ASTM B446-03(2008)e1
(Specification)Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy (UNS N06650)* Rod and Bar
Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy (UNS N06650)* Rod and Bar
ABSTRACT
This specification covers nickel-chromium-molybdenum-columbium (UNS N06625), nickel-chromium-molybdenum-silicon alloy (UNS N06219), and nickel-chromium-molybdenum-tungsten alloy (UNS N06650) in the form of hot-worked rod and bar and cold-worked rod. The matreial shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, columbium, tantalum, cobalt, molybdenum, iorn, aluminum, titanium, copper, nickel, tungsten, and nitrogen. The materials shall conform to the the heat treatment and room temperature tensile properties such as tensile strength, yield strength, and elongation. Dimensions of the alloys such as diameter, thickness, or width, length and straightness shall also be determined.
SCOPE
1.1 This specification covers nickel-chromium-molybdenum-columbium (UNS N06625), nickel-chromium-molybdenum-silicon alloy (UNS N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy (UNS N06650)* in the form of hot-worked rod and bar and cold-worked rod in the conditions shown in Table 1.
1.1.1 UNS N06625 products are furnished in two grades of different heat-treated conditions:
1.1.1.1 Grade 1 (Annealed)—Material is normally employed in service temperatures up to 1100°F (593°C).
1.1.1.2 Grade 2 (Solution Annealed)—Material is normally employed in service temperatures above 1100°F (593°C) when resistance to creep and rupture is required.
Note 1—Hot-working or reannealing may change properties significantly, depending on working history and temperatures.
1.1.2 Alloys UNS N06219 and UNS N06650 are supplied in solution annealed condition only.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 The following precautionary caveat pertains only to the test methods portion, Section 12, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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´1
Designation:B446 −03(Reapproved 2008)
Standard Specification for
Nickel-Chromium-Molybdenum-Columbium Alloy (UNS
N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS
N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy
(UNS N06650) Rod and Bar
This standard is issued under the fixed designation B446; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
ε NOTE—Table 1 was corrected editorially in October 2010.
1. Scope those identified in the appropriate Material Safety Data Sheet
(MSDS) for this product/material as provided by the
1.1 This specification covers nickel-chromium-
manufacturer, to establish appropriate safety and health
molybdenum-columbium (UNS N06625), nickel-chromium-
practices, and determine the applicability of regulatory limi-
molybdenum-silicon alloy (UNS N06219), and Nickel-
tations prior to use.
Chromium-Molybdenum-Tungsten Alloy (UNS N06650)* in
the form of hot-worked rod and bar and cold-worked rod in the
2. Referenced Documents
conditions shown in Table 1.
1.1.1 UNS N06625 products are furnished in two grades of 2.1 ASTM Standards:
B443 Specification for Nickel-Chromium-Molybdenum-
different heat-treated conditions:
1.1.1.1 Grade 1 (Annealed)—Material is normally em- Columbium Alloy(UNS N06625) and Nickel-Chromium-
Molybdenum-SiliconAlloy (UNS N06219) Plate, Sheet,
ployed in service temperatures up to 1100°F (593°C).
1.1.1.2 Grade 2 (Solution Annealed)—Material is normally and Strip
B880 Specification for General Requirements for Chemical
employed in service temperatures above 1100°F (593°C) when
resistance to creep and rupture is required. Check Analysis Limits for Nickel, Nickel Alloys and
Cobalt Alloys
NOTE 1—Hot-working or reannealing may change properties
E8 Test Methods for Tension Testing of Metallic Materials
significantly, depending on working history and temperatures.
E29 Practice for Using Significant Digits in Test Data to
1.1.2 AlloysUNSN06219andUNSN06650aresuppliedin
Determine Conformance with Specifications
solution annealed condition only.
E1473 Test Methods for Chemical Analysis of Nickel,
1.2 The values stated in inch-pound units are to be regarded
Cobalt, and High-Temperature Alloys
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
3. Terminology
and are not considered standard.
3.1 Definitions of Terms Specific to This Standard:
1.3 The following precautionary caveat pertains only to the
3.1.1 bar, n—material of rectangular (flats) or square solid
test methods portion, Section 12, of this specification:This
section up to and including 10 in. (254 mm) in width and ⁄8 in.
standard does not purport to address all of the safety concerns,
(3.2 mm) and over in thickness in straight lengths.
if any, associated with its use. It is the responsibility of the user
3.1.1.1 Discussion—Hot-worked rectangular bar in widths
of this standard to become familiar with all hazards including
10 in. (254 mm) and under may be furnished as hot-rolled plate
with sheared or cut edges in accordance with Specification
B443, provided the mechanical property requirements of this
This specification is under the jurisdiction of ASTM Committee B02 on specification are met.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved March 1, 2008. Published March 2008. Originally
approved in 1966. Last previous edition approved in 2003 as B446– 03. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/B0446-03R08E01. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
* New designation (UNS N06650) was established in accordance with Practice Standards volume information, refer to the standard’s Document Summary page on
E527 and SAE J 1086, Practice for Numbering Metals and Alloys (UNS). the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
B446−03 (2008)
TABLE 1 Conditions for Hot-Worked Rod and Bar and Cold- TABLE 4 Permissible Variations in Diameter or Distance Between
A
Worked Rod Parallel Surfaces of Hot-Worked Rod and Bar
Tensile Yield Elongation
Permissible Variations from
Diameter or Distance
Strength Strength in 2 in. or
Specified Dimensions, in.
Specified Dimension,
Between Parallel Surfaces,
min, ksi (0.2 % offset), 50 mm or A
(mm)
in. (mm)
in. (mm)
(MPa) min, ksi (MPa) 4D,min,%
Plus Minus
B
UNS N06625 Grade 1 (Annealed)
Rod and bar, hot-worked:
Up to 4 (102), incl 120 60 30
1 (25.4) and under 0.016 (0.41) 0.016 (0.41)
Over 4 (102) to 10 (254), 110 50 25
Over 1 (25.4) to 2 (50.8), incl 0.031 (0.79) 0.016 (0.41)
incl
C
Over 2 (50.8) to 4 0.047 (1.19) 0.031 (0.79)
UNS N06625 Grade 2 (Solution Annealed)
(101.6), incl
All sizes 100 40 30
Over 4 (101.6) 0.125 (3.18) 0.063 (1.60)
UNS N06219 All (Solution Annealed)
Rod, rough-turned or
All sizes 96 (660) † 39 (270) 50
ground:
UNS N06650 All (Solution Annealed)
Under 1 (25.4) 0.005 (0.13) 0.005 (0.13)
All sizes 116 (800) 58 (400) 45
1 (25.4) and over 0.031 (0.79) 0
A
Forging quality is furnished to chemical requirements and surface inspection
B
Forging quantity rod:
only. No tensile properties are required. Forging stock is typically supplied in the
Under 1 (25.4) 0.005 (0.13) 0.005 (0.13)
hot worked condition, (see X1.1.5).
1 (25.4) and over 0.031 (0.79) 0
B
Annealed 1600°F (871°C) minimum.
A
C
Solution annealed at 2000°F (1093°C) minimum, with or without subsequent Dimensions apply to diameter of rods, to distance between parallel surfaces of
squares, and separately to width and thickness of rectangles.
stabilization anneal at 1800°F (982°C) minimum to increase resistance to
B
sensitization. Spot grinding is permitted to remove minor surface imperfections. The depth of
these spot ground areas shall not exceed 3 % of the diameter of the rod.
† MPa was corrected editorially.
TABLE 2 Chemical Requirements
Composition
Limits, %
Element performance of material ordered under this specification.
N06625 N06219 N06650
Examples of such requirements include, but are not limited to,
Carbon 0.10 max 0.05 max 0.03 max
the following:
Manganese 0.50 max 0.50 max 0.50 max
Silicon 0.50 max 0.70-1.10 0.50 max 4.1.1 ASTM designation,
Phosphorus 0.015 max 0.020 max 0.020 max
4.1.2 UNS number,
Sulfur 0.015 max 0.010 max 0.010 max
4.1.3 Section—Rod (round) or bar (square or rectangular),
Chromium 20.0 min 18.0-22.0 19.0-21.0
4.1.4 Dimensions, including length,
23.0 max . .
Columbium + tantalum 3.15 min . 0.05-0.50
4.1.5 Condition (see 1.1.1, 1.1.2, and appendix),
4.15 max .
4.1.5.1 If neither grade of N06625 is specified, Grade 1 will
Cobalt (if determined) 1.0 max 1.0 max 1.0 max
Molybdenum 8.0 min 7.0-9.0 9.5-12.5 be supplied,
10.0 max . .
4.1.6 Finish (Section 8),
Iron 5.0 max 2.0-4.0 12.0-16.0
4.1.7 Quantity—Feet (or metres) or number of pieces,
Aluminum 0.40 max 0.50 max 0.05-0.50
Titanium 0.40 max 0.50 max .
4.1.8 Certification—State if certification is required (see
Copper . 0.50 max 0.30 max
Section 15),
A
Nickel 58.0 min Bal. Bal.
4.1.9 Samples for Product (Check) Analysis—State whether
Tungsten . . 0.50-2.50
Nitrogen . . 0.05-0.20
samples for product (check) analysis should be furnished (see
A
Element shall be determined arithmetically by difference. 5.2), and
4.1.10 Product Marking (see Section 16)—State product
marking requirements.
TABLE 3 Permissible Variations in Diameter of Cold-Worked Rod
4.1.11 Purchaser Inspection (see Section 13)—If purchaser
Permissible Variations from Specified
wishes to witness tests or inspection of material at place of
Specified Dimension,
Dimension, in. (mm)
manufacture, the purchase order must so state, indicating
in. (mm)
Plus Minus
which test or inspections are to be witnessed.
1 3
⁄16 (1.6) to ⁄16 (4.8), excl 0 0.002 (0.05)
3 1
⁄16 (4.8) to ⁄2 (12.7), excl 0 0.003 (0.08)
1 15 5. Chemical Composition
⁄2 (12.7) to ⁄16 (23.8), incl 0.001 (0.03) 0.002 (0.05)
15 15
Over ⁄16 (23.8) to 1 ⁄16 (49.2), incl 0.0015 (0.04) 0.003 (0.08)
5.1 The material shall conform to the composition limits
15 1
Over 1 ⁄16 (49.2) to 2 ⁄2 (63.5), incl 0.002 (0.05) 0.004 (0.10)
specified in Table 2.
5.2 If a product (check) analysis is performed by the
purchaser, the material shall conform to the product (check)
analysis variations in Specification B880.
3.1.2 rod, n—material of round solid section furnished in
straight lengths.
6. Mechanical Properties and Other Requirements
4. Ordering Information
6.1 Mechanical Properties—The material shall conform to
4.1 It is the responsibility of the purchaser to specify all the heat treatment and room temperature tensile properties
requirements that are necessary for the safe and satisfactory prescribed in Table 1.
´1
B446−03 (2008)
7. Dimensions and Permissible Variations 9.1.2 Alot for mechanical properties testing shall consist of
all material from the same heat, nominal diameter or thickness,
7.1 Diameter, Thickness, or Width—The permissible varia-
and condition.
tions from the specified dimensions of cold-worked rod shall
9.1.2.1 Where material cannot be identified by heat, a lot
be as prescribed in Table 3, and of hot-worked rod and bar as
shall consist of not more than 500 lb (227 kg) of material in the
prescribed in Table 4.
same size and condition except that a single piece weighing
7.2 Out-of-Round—Hot-worked rods and cold-worked rods
over 500 lb (227 kg) shall be considered as one lot.
(except“forgingquality”)allsizes,instraightlengths,shallnot
9.2 Test Material Selection:
be out-of-round by more than one half the total permissible
9.2.1 Chemical Analysis—Representative samples from
variations in diameter shown in Tables 3 and 4, except for
each lot shall be taken during pouring or subsequent process-
hot-worked rods ⁄2 in. (12.7 mm) in diameter and under, which
ing.
may be out-of-round by the total permissible variations in
diameter shown in Table 4. 9.2.1.1 Product (check) analysis shall be wholly the respon-
sibility of the purchaser.
7.3 Machining Allowances for Hot-Worked Materials—
9.2.2 Mechanical Properties—Samples of the material to
When the surfaces of hot-worked products are to be machined,
provide test specimens for mechanical properties shall be taken
the allowances prescribed in Table 5 are recommended for
from such locations in each lot as to be representative of that
normal machining operations.
lot.
7.4 Length—The permissible variations in length of cold-
worked and hot-worked rod and bar shall be as prescribed in
10. Number of Test
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:B446–03(Reapproved2008) Designation: B446 – 03 (Reapproved 2008)
Standard Specification for
Nickel-Chromium-Molybdenum-Columbium Alloy (UNS
N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS
N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy
(UNS N06650)*N06650) Rod and Bar
This standard is issued under the fixed designation B446; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
´ NOTE—Table 1 was corrected editorially in October 2010.
1. Scope
1.1 This specification covers nickel-chromium-molybdenum-columbium (UNS N06625), nickel-chromium-molybdenum-
silicon alloy (UNS N06219), and Nickel-Chromium-Molybdenum-TungstenAlloy (UNS N06650)* in the form of hot-worked rod
and bar and cold-worked rod in the conditions shown in Table 1.
1.1.1 UNS N06625 products are furnished in two grades of different heat-treated conditions:
1.1.1.1 Grade 1 (Annealed)—Material is normally employed in service temperatures up to 1100°F (593°C).
1.1.1.2 Grade 2 (Solution Annealed)—Material is normally employed in service temperatures above 1100°F (593°C) when
resistance to creep and rupture is required.
NOTE 1—Hot-working or reannealing may change properties significantly, depending on working history and temperatures.
1.1.2 Alloys UNS N06219 and UNS N06650 are supplied in solution annealed condition only.
1.2The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 The following precautionary caveat pertains only to the test methods portion, Section 12, of this specification: This standard
does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this
standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for
this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the
applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
B443 Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625) and Nickel-Chromium-
Molybdenum-Silicon Alloy (UNS N06219) Plate, Sheet, and Strip
B880 Specification for General Requirements for Chemical CheckAnalysis Limits for Nickel, NickelAlloys and CobaltAlloys
E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
ThisspecificationisunderthejurisdictionofASTMCommitteeB02onNonferrousMetalsandAlloysandisthedirectresponsibilityofSubcommitteeB02.07onRefined
Nickel and Cobalt and Their Alloys.
Current edition approved March 1, 2008. Published March 2008. Originally approved in 1966. Last previous edition approved in 2003 as B446 - 03. DOI:
10.1520/B0446-03R08E01.
* New designation (UNS N06650) was established in accordance with Practice E527 and SAE J 1086, Practice for Numbering Metals and Alloys (UNS).
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
´1
B446 – 03 (2008)
TABLE 1 Conditions for Hot-Worked Rod and Bar and Cold-
A
Worked Rod
Tensile Yield Elongation
Diameter or Distance
Strength Strength in 2 in. or
Between Parallel
min, ksi (0.2 % offset), 50 mm or
Surfaces, in. (mm)
(MPa) min, ksi (MPa) 4D,min,%
B
UNS N06625 Grade 1 (Annealed)
Up to 4 (102), incl 120 60 30
Over 4 (102) to 10 (254), 110 50 25
incl
C
UNS N06625 Grade 2 (Solution Annealed)
All sizes 100 40 30
UNS N06219 All (Solution Annealed)
All sizes 96 (600) 39 (270) 50
All sizes 96 (660) † 39 (270) 50
UNS N06650 All (Solution Annealed)
All sizes 116 (800) 58 (400) 45
A
Forging quality is furnished to chemical requirements and surface inspection
only. No tensile properties are required. Forging stock is typically supplied in the
hot worked condition, (see X1.1.5).
B
Annealed 1600°F (871°C) minimum.
C
Solution annealed at 2000°F (1093°C) minimum, with or without subsequent
stabilization anneal at 1800°F (982°C) minimum to increase resistance to sensi-
tization.
† MPa was corrected editorially.
3.1.1 bar, n—material of rectangular (flats) or square solid section up to and including 10 in. (254 mm) in width and ⁄8 in. (3.2
mm) and over in thickness in straight lengths.
3.1.1.1 Discussion—Hot-worked rectangular bar in widths 10 in. (254 mm) and under may be furnished as hot-rolled plate with
sheared or cut edges in accordance with Specification B443, provided the mechanical property requirements of this specification
are met.
3.1.2 rod, n—material of round solid section furnished in straight lengths.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for the safe and satisfactory
performance of material ordered under this specification. Examples of such requirements include, but are not limited to, the
following:
4.1.1 ASTM designation,
4.1.2 UNS number,
4.1.3 Section—Rod (round) or bar (square or rectangular),
4.1.4 Dimensions, including length,
4.1.5 Condition (see 1.1.1, 1.1.2, and appendix),
4.1.5.1 If neither grade of N06625 is specified, Grade 1 will be supplied,
TABLE 2 Chemical Requirements
Composition
Limits, %
Element
N06625 N06219 N06650
Carbon 0.10 max 0.05 max 0.03 max
Manganese 0.50 max 0.50 max 0.50 max
Silicon 0.50 max 0.70-1.10 0.50 max
Phosphorus 0.015 max 0.020 max 0.020 max
Sulfur 0.015 max 0.010 max 0.010 max
Chromium 20.0 min 18.0-22.0 19.0-21.0
23.0 max . .
Columbium + tantalum 3.15 min . 0.05-0.50
4.15 max .
Cobalt (if determined) 1.0 max 1.0 max 1.0 max
Molybdenum 8.0 min 7.0-9.0 9.5-12.5
10.0 max . .
Iron 5.0 max 2.0-4.0 12.0-16.0
Aluminum 0.40 max 0.50 max 0.05-0.50
Titanium 0.40 max 0.50 max .
Copper . 0.50 max 0.30 max
A
Nickel 58.0 min Bal. Bal.
Tungsten . . 0.50-2.50
Nitrogen . . 0.05-0.20
A
Element shall be determined arithmetically by difference.
´1
B446 – 03 (2008)
TABLE 3 Permissible Variations in Diameter of Cold-Worked Rod
Permissible Variations from Specified
Specified Dimension,
Dimension, in. (mm)
in. (mm)
Plus Minus
1 3
⁄16 (1.6) to ⁄16 (4.8), excl 0 0.002 (0.05)
3 1
⁄16 (4.8) to ⁄2 (12.7), excl 0 0.003 (0.08)
1 15
⁄2 (12.7) to ⁄16 (23.8), incl 0.001 (0.03) 0.002 (0.05)
15 15
Over ⁄16 (23.8) to 1 ⁄16 (49.2), incl 0.0015 (0.04) 0.003 (0.08)
15 1
Over 1 ⁄16 (49.2) to 2 ⁄2 (63.5), incl 0.002 (0.05) 0.004 (0.10)
TABLE 4 Permissible Variations in Diameter or Distance
Between Parallel Surfaces of Hot-Worked Rod and Bar
Permissible Variations from
Specified Dimensions, in.
Specified Dimension,
A (mm)
in. (mm)
Plus Minus
Rod and bar, hot-worked:
1 (25.4) and under 0.016 (0.41) 0.016 (0.41)
Over 1 (25.4) to 2 (50.8), incl 0.031 (0.79) 0.016 (0.41)
Over 2 (50.8) to 4 0.047 (1.19) 0.031 (0.79)
(101.6), incl
Over 4 (101.6) 0.125 (3.18) 0.063 (1.60)
Rod, rough-turned or
ground:
Under 1 (25.4) 0.005 (0.13) 0.005 (0.13)
1 (25.4) and over 0.031 (0.79) 0
B
Forging quantity rod:
Under 1 (25.4) 0.005 (0.13) 0.005 (0.13)
1 (25.4) and over 0.031 (0.79) 0
A
Dimensions apply to diameter of rods, to distance between parallel surfaces of
squares, and separately to width and thickness of rectangles.
B
Spot grinding is permitted to remove minor surface imperfections. The depth of
these spot ground areas shall not exceed 3 % of the diameter of the rod.
4.1.6 Finish (Section 8),
4.1.7 Quantity—Feet (or metres) or number of pieces,
4.1.8 Certification—State if certification is required (see Section 15),
4.1.9 Samples for Product (Check) Analysis—State whether samples for product (check) analysis should be furnished (see 5.2),
and
4.1.10 Product Marking (see Section 16)—State product marking requirements.
4.1.11 Purchaser Inspection (see Section 13)—If purchaser wishes to witness tests or inspection of material at place of
manufacture, the purchase order must so state, indicating which test or inspections are to be witnessed.
5. Chemical Composition
5.1 The material shall conform to the composition limits specified in Table 2.
5.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis
variations in Specification B880.
6. Mechanical Properties and Other Requirements
6.1 Mechanical Properties—The material shall conform to the heat treatment and room temperature tensile properties
prescribed in Table 1.
7. Dimensions and Permissible Variations
7.1 Diameter, Thickness, or Width—The permissible variations from the specified dimensions of cold-worked rod shall be as
prescribed in Table 3, and of hot-worked rod and bar as prescribed in Table 4.
7.2 Out-of-Round—Hot-worked rods and cold-worked rods (except “forging quality”) all sizes, in straight lengths, shall not be
out-of-round by more than one half the total permissible variations in diameter shown in Tables 3 and 4, except for hot-worked
rods ⁄2 in. (12.7 mm) in diameter and under, which may be out-of-round by the total permissible variations in diameter shown in
Table 4.
7.3 Machining Allowances for Hot-Worked Materials—When the surfaces of hot-worked products are to be machined, the
allowances prescribed in Table 5 are recommended for normal machining operations.
7.4 Length—The permissible variations in length of cold-worked and hot-worked rod and bar shall be as prescribed in Table
6.
´1
B446 – 03 (2008)
TABLE 5 Normal Machining Allowances for Hot-Worked Material
Finished-Machined Dimensions for Finishes As Normal Machining Allowance, in. (mm)
A
Indicated below, in. (mm) On Diameter, Distance Between For Rectangular Bar
For Rods Parallel Surfaces
of Square Bars
On Thickness On Width
B
Hot-worked:
7 1 1 1 3
Up to ⁄8 (22.2), incl ⁄8 (3.2) ⁄8 (3.2) ⁄8 (3.2) ⁄16 (4.8)
7 7 1 3 1 3
Over ⁄8 to 1 ⁄8 (22.2 to 47.6), incl ⁄8 (3.2) ⁄16 (4.8) ⁄8 (3.2) ⁄16 (4.8)
7 7 3 1 3
Over 1 ⁄8 to 2 ⁄8 (47.6 to 73.0), incl ⁄16 (4.8) ⁄4 (6.4) . . . ⁄16 (4.8)
7 13 1 3
Over 2 ⁄8 to 3 ⁄16 (73.0 to 96.8), incl ⁄4 (6.4) . . ⁄16 (4.8)
13 1 3
Over 3 ⁄16 (96.8) ⁄4 (6.4) . . ⁄8 (9.5)
C
Hot-worked rods, rough-turned or rough ground:
15 1
⁄16 to 4 (23.8 to 101.6), incl in diameter ⁄16 (1.6) . . .
Over 4 to 12 (101.6 to 304.8), incl in diameter ⁄8 (3.2) . . .
A
Dimensions apply to diameter of rods, to distance between parallel surfaces of square bar, and separately to width and thickness of rectangular bar.
B
The allowances for hot-worked material in Table 5 are recommended for rods machined in lengths of 3 ft (0.91 m) or less and for bars machined in lengths of2ft(0.61
m) or less. Hot-worked material to be machined in longer lengths should be specified showing the finished cross-sectional dimension and the length in which the material
will be machined in order that the manufacturer may supply material with sufficient oversize, including allowance for out-of-straightness.
C
Applicable to 3 ft (0.91 m) max length.
TABLE 6 Permissible Variations in Length of Rods and Bars
Random mill lengths:
A
Hot-worked
B
6 to 24 ft (1.83 to 7.31 m) long with not more than 25 weight % between 6 and 9 ft (1.83 and 2.74 m).
Cold-worked
6 to 20 ft (1.83 to 6.1 m) long with not more than 25 weight % between 6 and 10 ft (1.83 and 3.05 m).
Multiple lengths
Furnished in multiples of a specified unit length, within the length limits indicated above. For each multiple, an allowance of ⁄4 in. (6.4 mm) will be made for
cutting, unless otherwise specified. At the manufacturer’s option, individual specified unit lengths may be furnished.
Nominal lengths
A
Specified nominal lengths having a range of not less than 2 ft. (610 mm) with no short lengths allowed.
Cut lengths
A specified length to which all rods and bars will be cut with a permissible variation of plus ⁄8 in. (3.2 mm), minus 0 for sizes 8 in. (203 mm) and less in
diameter or distance between parallel surfaces. For larger sizes, the permissible variation shall be + ⁄4 in. (6.4 mm), −0.
A
For cold-worked rod under ⁄2 in. (12.7 mm) in diameter ordered to nominal or stock lengths with a 2-ft (610-mm) range, at least 93 % of such material shall be within
the range specified; the balance may be in shorter lengths but in no case shall lengths less than 4 ft (1220 mm) be furnished.
B
For hot-worked sections weighing over 25 lb/ft (37 kg/m) and for smooth forged products, all sections, short lengths down to 2 ft (610 mm) may be furnished.
7.4.1 Rods and bars ordered to random or nominal lengths will be furnished with either cropped or saw-cut ends; material
ordered to cut lengths will be furnished with square saw-cut or machined ends.
7.5 Straightness:
7.5.1 The permissible variations in straightness of cold-worked rod as determined by the departure from straightness shall be
as prescribed in Table 7.
7.5.2 Thepermissiblevariationsinstraightnessofhot-workedrodandbarasdeterminedbythedeparturefromstraightnessshall
be as specified in Table 8.
8. Workmanship, Finish and Appearance
8.1 The material shall be uniform in quality and condition, smooth, commercially straight or flat, and free of injurious
imperfections.
9. Sampling
9.1 Lot—Definition:
9.1.1 A lot for chemical analysis shall consist of one heat.
9.1.2 Alot for mechanical properties testing shall consist of all material from the same heat, nominal diameter or thickness, and
condition.
9.1.2.1 Where material cannot be identified by heat, a lot shall consist of not more than 500 lb (227 kg) of material in the same
size and conditi
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:B446–03(Reapproved2008) Designation: B446 – 03 (Reapproved 2008)
Standard Specification for
Nickel-Chromium-Molybdenum-Columbium Alloy (UNS
N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS
N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy
(UNS N06650)*N06650) Rod and Bar
This standard is issued under the fixed designation B446; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
´ NOTE—Table 1 was corrected editorially in October 2010.
1. Scope
1.1 This specification covers nickel-chromium-molybdenum-columbium (UNS N06625), nickel-chromium-molybdenum-
silicon alloy (UNS N06219), and Nickel-Chromium-Molybdenum-TungstenAlloy (UNS N06650)* in the form of hot-worked rod
and bar and cold-worked rod in the conditions shown in Table 1.
1.1.1 UNS N06625 products are furnished in two grades of different heat-treated conditions:
1.1.1.1 Grade 1 (Annealed) —Material is normally employed in service temperatures up to 1100°F (593°C).
1.1.1.2 Grade 2 (Solution Annealed)—Material is normally employed in service temperatures above 1100°F (593°C) when
resistance to creep and rupture is required.
NOTE 1—Hot-working or reannealing may change properties significantly, depending on working history and temperatures.
1.1.2 Alloys UNS N06219 and UNS N06650 are supplied in solution annealed condition only.
1.2The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 The following precautionary caveat pertains only to the test methods portion, Section 12, of this specification: This standard
does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this
standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for
this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the
applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
B443 Specification for Nickel-Chromium-Molybdenum-Columbium Alloy(UNS N06625) and Nickel-Chromium-
Molybdenum-SiliconAlloy (UNS N06219) Plate, Sheet, and Strip
B880 Specification for General Requirements for Chemical CheckAnalysis Limits for Nickel, NickelAlloys and CobaltAlloys
E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
ThisspecificationisunderthejurisdictionofASTMCommitteeB02onNonferrousMetalsandAlloysandisthedirectresponsibilityofSubcommitteeB02.07onRefined
Nickel and Cobalt and Their Alloys.
Current edition approved March 1, 2008. Published March 2008. Originally approved in 1966. Last previous edition approved in 2003 as B446 - 03. DOI:
10.1520/B0446-03R08E01.
* New designation (UNS N06650) was established in accordance with Practice E527 and SAE J 1086, Practice for Numbering Metals and Alloys (UNS).
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
´1
B446 – 03 (2008)
TABLE 1 Conditions for Hot-Worked Rod and Bar and Cold-
A
Worked Rod
Tensile Yield Elongation
Diameter or Distance
Strength Strength in 2 in. or
Between Parallel
min, ksi (0.2 % offset), 50 mm or
Surfaces, in. (mm)
(MPa) min, ksi (MPa) 4D,min,%
B
UNS N06625 Grade 1 (Annealed)
Up to 4 (102), incl 120 60 30
Over 4 (102) to 10 (254), 110 50 25
incl
C
UNS N06625 Grade 2 (Solution Annealed)
All sizes 100 40 30
UNS N06219 All (Solution Annealed)
All sizes 96 (600) 39 (270) 50
All sizes 96 (660) † 39 (270) 50
UNS N06650 All (Solution Annealed)
All sizes 116 (800) 58 (400) 45
A
Forging quality is furnished to chemical requirements and surface inspection
only. No tensile properties are required. Forging stock is typically supplied in the
hot worked condition, (see X1.1.5).
B
Annealed 1600°F (871°C) minimum.
C
Solution annealed at 2000°F (1093°C) minimum, with or without subsequent
stabilization anneal at 1800°F (982°C) minimum to increase resistance to sensi-
tization.
† MPa was corrected editorially.
3.1.1 bar, n—material of rectangular (flats) or square solid section up to and including 10 in. (254 mm) in width and ⁄8 in. (3.2
mm) and over in thickness in straight lengths.
3.1.1.1 Discussion—Hot-worked rectangular bar in widths 10 in. (254 mm) and under may be furnished as hot-rolled plate with
sheared or cut edges in accordance with Specification B443, provided the mechanical property requirements of this specification
are met.
3.1.2 rod, n—material of round solid section furnished in straight lengths.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for the safe and satisfactory
performance of material ordered under this specification. Examples of such requirements include, but are not limited to, the
following:
4.1.1 ASTM designation,
4.1.2 UNS number,
4.1.3 Section—Rod (round) or bar (square or rectangular),
4.1.4 Dimensions, including length,
4.1.5 Condition (see 1.1.1, 1.1.2, and appendix),
4.1.5.1 If neither grade of N06625 is specified, Grade 1 will be supplied,
TABLE 2 Chemical Requirements
Composition
Limits, %
Element
N06625 N06219 N06650
Carbon 0.10 max 0.05 max 0.03 max
Manganese 0.50 max 0.50 max 0.50 max
Silicon 0.50 max 0.70-1.10 0.50 max
Phosphorus 0.015 max 0.020 max 0.020 max
Sulfur 0.015 max 0.010 max 0.010 max
Chromium 20.0 min 18.0-22.0 19.0-21.0
23.0 max . .
Columbium + tantalum 3.15 min . 0.05-0.50
4.15 max .
Cobalt (if determined) 1.0 max 1.0 max 1.0 max
Molybdenum 8.0 min 7.0-9.0 9.5-12.5
10.0 max . .
Iron 5.0 max 2.0-4.0 12.0-16.0
Aluminum 0.40 max 0.50 max 0.05-0.50
Titanium 0.40 max 0.50 max .
Copper . 0.50 max 0.30 max
A
Nickel 58.0 min Bal. Bal.
Tungsten . . 0.50-2.50
Nitrogen . . 0.05-0.20
A
Element shall be determined arithmetically by difference.
´1
B446 – 03 (2008)
TABLE 3 Permissible Variations in Diameter of Cold-Worked Rod
Permissible Variations from Specified
Specified Dimension,
Dimension, in. (mm)
in. (mm)
Plus Minus
1 3
⁄16 (1.6) to ⁄16 (4.8), excl 0 0.002 (0.05)
3 1
⁄16 (4.8) to ⁄2 (12.7), excl 0 0.003 (0.08)
1 15
⁄2 (12.7) to ⁄16 (23.8), incl 0.001 (0.03) 0.002 (0.05)
15 15
Over ⁄16 (23.8) to 1 ⁄16 (49.2), incl 0.0015 (0.04) 0.003 (0.08)
15 1
Over 1 ⁄16 (49.2) to 2 ⁄2 (63.5), incl 0.002 (0.05) 0.004 (0.10)
TABLE 4 Permissible Variations in Diameter or Distance
Between Parallel Surfaces of Hot-Worked Rod and Bar
Permissible Variations from
Specified Dimensions, in.
Specified Dimension,
A (mm)
in. (mm)
Plus Minus
Rod and bar, hot-worked:
1 (25.4) and under 0.016 (0.41) 0.016 (0.41)
Over 1 (25.4) to 2 (50.8), incl 0.031 (0.79) 0.016 (0.41)
Over 2 (50.8) to 4 0.047 (1.19) 0.031 (0.79)
(101.6), incl
Over 4 (101.6) 0.125 (3.18) 0.063 (1.60)
Rod, rough-turned or
ground:
Under 1 (25.4) 0.005 (0.13) 0.005 (0.13)
1 (25.4) and over 0.031 (0.79) 0
B
Forging quantity rod:
Under 1 (25.4) 0.005 (0.13) 0.005 (0.13)
1 (25.4) and over 0.031 (0.79) 0
A
Dimensions apply to diameter of rods, to distance between parallel surfaces of
squares, and separately to width and thickness of rectangles.
B
Spot grinding is permitted to remove minor surface imperfections. The depth of
these spot ground areas shall not exceed 3 % of the diameter of the rod.
4.1.6 Finish (Section 8),
4.1.7 Quantity—Feet (or metres) or number of pieces,
4.1.8 Certification—State if certification is required (see Section 15),
4.1.9 Samples for Product (Check) Analysis—State whether samples for product (check) analysis should be furnished (see 5.2),
and
4.1.10 Product Marking (see Section 16)—State product marking requirements.
4.1.11 Purchaser Inspection (see Section 13)—If purchaser wishes to witness tests or inspection of material at place of
manufacture, the purchase order must so state, indicating which test or inspections are to be witnessed.
5. Chemical Composition
5.1 The material shall conform to the composition limits specified in Table 2.
5.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis
variations in Specification B880.
6. Mechanical Properties and Other Requirements
6.1 Mechanical Properties—The material shall conform to the heat treatment and room temperature tensile properties
prescribed in Table 1.
7. Dimensions and Permissible Variations
7.1 Diameter, Thickness, or Width—The permissible variations from the specified dimensions of cold-worked rod shall be as
prescribed in Table 3, and of hot-worked rod and bar as prescribed in Table 4.
7.2 Out-of-Round—Hot-worked rods and cold-worked rods (except “forging quality”) all sizes, in straight lengths, shall not be
out-of-round by more than one half the total permissible variations in diameter shown in Tables 3 and 4, except for hot-worked
rods ⁄2 in. (12.7 mm) in diameter and under, which may be out-of-round by the total permissible variations in diameter shown in
Table 4.
7.3 Machining Allowances for Hot-Worked Materials—When the surfaces of hot-worked products are to be machined, the
allowances prescribed in Table 5 are recommended for normal machining operations.
7.4 Length—The permissible variations in length of cold-worked and hot-worked rod and bar shall be as prescribed in Table
6.
´1
B446 – 03 (2008)
TABLE 5 Normal Machining Allowances for Hot-Worked Material
Finished-Machined Dimensions for Finishes As Normal Machining Allowance, in. (mm)
A
Indicated below, in. (mm) On Diameter, Distance Between For Rectangular Bar
For Rods Parallel Surfaces
of Square Bars
On Thickness On Width
B
Hot-worked:
7 1 1 1 3
Up to ⁄8 (22.2), incl ⁄8 (3.2) ⁄8 (3.2) ⁄8 (3.2) ⁄16 (4.8)
7 7 1 3 1 3
Over ⁄8 to 1 ⁄8 (22.2 to 47.6), incl ⁄8 (3.2) ⁄16 (4.8) ⁄8 (3.2) ⁄16 (4.8)
7 7 3 1 3
Over 1 ⁄8 to 2 ⁄8 (47.6 to 73.0), incl ⁄16 (4.8) ⁄4 (6.4) . . . ⁄16 (4.8)
7 13 1 3
Over 2 ⁄8 to 3 ⁄16 (73.0 to 96.8), incl ⁄4 (6.4) . . ⁄16 (4.8)
13 1 3
Over 3 ⁄16 (96.8) ⁄4 (6.4) . . ⁄8 (9.5)
C
Hot-worked rods, rough-turned or rough ground:
15 1
⁄16 to 4 (23.8 to 101.6), incl in diameter ⁄16 (1.6) . . .
Over 4 to 12 (101.6 to 304.8), incl in diameter ⁄8 (3.2) . . .
A
Dimensions apply to diameter of rods, to distance between parallel surfaces of square bar, and separately to width and thickness of rectangular bar.
B
The allowances for hot-worked material in Table 5 are recommended for rods machined in lengths of 3 ft (0.91 m) or less and for bars machined in lengths of2ft(0.61
m) or less. Hot-worked material to be machined in longer lengths should be specified showing the finished cross-sectional dimension and the length in which the material
will be machined in order that the manufacturer may supply material with sufficient oversize, including allowance for out-of-straightness.
C
Applicable to 3 ft (0.91 m) max length.
TABLE 6 Permissible Variations in Length of Rods and Bars
Random mill lengths:
A
Hot-worked
B
6 to 24 ft (1.83 to 7.31 m) long with not more than 25 weight % between 6 and 9 ft (1.83 and 2.74 m).
Cold-worked
6 to 20 ft (1.83 to 6.1 m) long with not more than 25 weight % between 6 and 10 ft (1.83 and 3.05 m).
Multiple lengths
Furnished in multiples of a specified unit length, within the length limits indicated above. For each multiple, an allowance of ⁄4 in. (6.4 mm) will be made for
cutting, unless otherwise specified. At the manufacturer’s option, individual specified unit lengths may be furnished.
Nominal lengths
A
Specified nominal lengths having a range of not less than 2 ft. (610 mm) with no short lengths allowed.
Cut lengths
A specified length to which all rods and bars will be cut with a permissible variation of plus ⁄8 in. (3.2 mm), minus 0 for sizes 8 in. (203 mm) and less in
diameter or distance between parallel surfaces. For larger sizes, the permissible variation shall be + ⁄4 in. (6.4 mm), −0.
A
For cold-worked rod under ⁄2 in. (12.7 mm) in diameter ordered to nominal or stock lengths with a 2-ft (610-mm) range, at least 93 % of such material shall be within
the range specified; the balance may be in shorter lengths but in no case shall lengths less than 4 ft (1220 mm) be furnished.
B
For hot-worked sections weighing over 25 lb/ft (37 kg/m) and for smooth forged products, all sections, short lengths down to 2 ft (610 mm) may be furnished.
7.4.1 Rods and bars ordered to random or nominal lengths will be furnished with either cropped or saw-cut ends; material
ordered to cut lengths will be furnished with square saw-cut or machined ends.
7.5 Straightness:
7.5.1 The permissible variations in straightness of cold-worked rod as determined by the departure from straightness shall be
as prescribed in Table 7.
7.5.2 Thepermissiblevariationsinstraightnessofhot-workedrodandbarasdeterminedbythedeparturefromstraightnessshall
be as specified in Table 8.
8. Workmanship, Finish and Appearance
8.1 The material shall be uniform in quality and condition, smooth, commercially straight or flat, and free of injurious
imperfections.
9. Sampling
9.1 Lot—Definition:
9.1.1 A lot for chemical analysis shall consist of one heat.
9.1.2 Alot for mechanical properties testing shall consist of all material from the same heat, nominal diameter or thickness, and
condition.
9.1.2.1 Where material cannot be identified by heat, a lot shall consist of not more than 500 lb (227 kg) of material in the same
size and conditio
...
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