ASTM B639-02(2013)
(Specification)Standard Specification for Precipitation Hardening Cobalt-Containing Alloys (UNS R30155 and UNS R30816) Rod, Bar, Forgings, and Forging Stock for High-Temperature Service
Standard Specification for Precipitation Hardening Cobalt-Containing Alloys (UNS R30155 and UNS R30816) Rod, Bar, Forgings, and Forging Stock for High-Temperature Service
ABSTRACT
This specification covers hot- and cold-worked precipitation hardenable cobalt-containing alloys (UNS R30155 and UNS R30816) rod, bar, forgings, and forging stock for high temperature service. The material shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, columbium, tantalum, iron, cobalt, and nitrogen. The materials shall conform to the required tensile and hardness properties such namely tensile strength, yield strength, alongation and Brinell hardness. The alloys shall also conform to the required stress-rupture properties. Dimensions such as diameter, thickness, or width, out-of-round, corners, cut lengths, straightness for cold-worked and hot-worked rod and bar shall be measured.
SCOPE
1.1 This specification covers hot- and cold-worked precipitation hardenable cobalt-containing alloys (UNS R30155 and UNS R30816) rod, bar, forgings, and forging stock for high-temperature service.
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 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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Designation:B639 −02(Reapproved 2013)
Standard Specification for
Precipitation Hardening Cobalt-Containing Alloys (UNS
R30155 and UNSR30816) Rod, Bar, Forgings, and Forging
Stock for High-Temperature Service
This standard is issued under the fixed designation B639; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Cobalt, and High-Temperature Alloys
1.1 This specification covers hot- and cold-worked precipi-
3. Terminology
tation hardenable cobalt-containing alloys (UNS R30155 and
UNS R30816) rod, bar, forgings, and forging stock for high- 3.1 Definitions of Terms Specific to This Standard:
3.1.1 bar, n—material of rectangular (flats), hexagonal,
temperature service.
octagonal, or square solid section in straight lengths.
1.2 The values stated in inch-pound units are to be regarded
3.1.2 rod, n—material of round solid section furnished in
as standard. The values given in parentheses are mathematical
straight lengths.
conversions to SI units that are provided for information only
and are not considered standard.
4. Ordering Information
1.3 This standard does not purport to address all of the
4.1 It is the responsibility of the purchaser to specify all
safety concerns, if any, associated with its use. It is the
requirements that are necessary for material ordered under this
responsibility of the user of this standard to become familiar
specification. Examples of such requirements include, but are
with all hazards including those identified in the appropriate
not limited to, the following:
Material Safety Data Sheet (MSDS) for this product/material
4.1.1 Alloy Name or UNS Number (see Table 1).
as provided by the manufacturer, to establish appropriate
4.1.2 ASTM Designation, including year of issue.
safety and health practices, and determine the applicability of
4.1.3 Condition (temper) (Table 4).
regulatory limitations prior to use.
4.1.4 Section—Rod or bar (round, rectangle, square,
2. Referenced Documents
hexagon, octagon).
4.1.4.1 Forging (sketch or drawing).
2.1 ASTM Standards:
4.1.5 Dimensions, including length.
B880Specification for General Requirements for Chemical
4.1.6 Quantity (mass or number of pieces).
Check Analysis Limits for Nickel, Nickel Alloys and
4.1.7 Forging stock—Specify if material is stock for reforg-
Cobalt Alloys
ing.
E8Test Methods for Tension Testing of Metallic Materials
4.1.8 Finish.
E29Practice for Using Significant Digits in Test Data to
4.1.9 Certification—State if certification or a report of test
Determine Conformance with Specifications
results is required (Section 15).
E139Test Methods for Conducting Creep, Creep-Rupture,
4.1.10 Samples for Product (Check) Analysis—Whether
and Stress-Rupture Tests of Metallic Materials
samplesforproduct(check)analysisshouldbefurnished(9.2).
E1473Test Methods for Chemical Analysis of Nickel,
4.1.11 Purchaser Inspection—If the purchaser wishes to
witness the tests or inspection of material at the place of
This specification is under the jurisdiction of ASTM Committee B02 on manufacture,thepurchaseordermustsostateindicatingwhich
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
tests or inspections are to be witnessed (Section 13).
B02.07 on Refined Nickel and Cobalt and Their Alloys.
*New designation established in accordance with Practices E527 and SAE
5. Chemical Composition
J1086. Practice for Numbering Metals and Alloys (UNS).
Current edition approved Feb. 1, 2013. Published February 2013. Originally
5.1 The material shall conform to the chemical composition
approved in 1970. Last previous edition approved in 2008 as B639–02 (2008).
limits specified in Table 1.
DOI: 10.1520/B0639-02R13.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2 If a product (check) analysis is performed by the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
purchaser, the material shall conform to the product (check)
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. analysis variations per Specification B880.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B639−02(2013)
TABLE 1 Chemical Requirements
Element Composition Limits, % Composition Limits, %
UNS R30155 (Formerly UNS R30816 (Formerly
Grade 661) Grade 671)
Carbon 0.08 to 0.16 0.32 to 0.42
Manganese 1.00 to 2.00 1.00 to 2.00
Silicon 1.00 max 1.00 max
Phosphorus 0.040 max 0.040 max
Sulfur 0.030 max 0.030 max
Chromium 20.00 to 22.50 19.00 to 21.00
Nickel 19.00 to 21.00 19.00 to 21.00
Molybdenum 2.50 to 3.50 3.50 to 4.50
Tungsten 2.00 to 3.00 3.50 to 4.50
Columbium + tantalum 0.75 to 1.25 3.50 to 4.50
A
Iron remainder 5.00 max
Cobalt 18.50 to 21.00 40.00 min
Nitrogen 0.20 max .
A
Element shall be determined arithmetically by difference.
A
TABLE 2 Tensile and Hardness Requirements
Elongation in 2 in. Reduction Brinell
Tensile Strength, Yield Strength (0.2 %
Alloy Heat Treatment or 50.8 mm or 4 D, of Area, Hardness,
min, psi (MPa) offset), min, psi (MPa)
min, % min, % min
R30155 solution + precipitation harden 110 000 (760) 50 000 (345) 30 30 192
R30816 solution + precipitation harden 130 000 (895) 60 000 (415) 20 20 248
A
The supplier shall demonstrate that the material will meet fully heat-treated properties after full heat treatment in accordance with Table 4.
A
TABLE 3 Stress-Rupture Requirements
Test Temperature, °F Elongation in 2 in. or 50.8
B
Alloy Heat Treatment Stress, psi (MPa) Minimum, h
(°C) mm, or 4D,min,%
R30155 solution + precipitation harden 1350 (732) 24 000 (165) 100 10
R30816 solution + precipitation harden 1350 (732) 38 000 (260) 100 8
A
The supplier shall demonstrate that material will meet fully heat-treated properties after full heat treatment in accordance with Table 4.
B
Test specimens meeting minimum requirements may be overloaded to produce rupture in a reasonable and practical time period.
A
TABLE 4 Heat Treatment TABLE 5 Permissible Variations in Diameter or Distance Between
Parallel Surfaces of Cold-Worked Rod and Bar
Recommended Solution
Alloy Precipitation Hardening Treatment
Treatment
Permissible Variations from
R30155 2125 to 2175°F (1162 to 1475 to 1525°F (801 to 829°C)
A
Specified Dimension, in. (mm)
Specified Dimension, in. (mm)
1190°C) hold 30 min, hold 4 h, air cool or furnace
+−
minimum, water quench cool
Rods:
R30816 2130 to 2170°F (1165 to 1390 to 1410°F (754 to 765°C)
1 3
1187°C), hold 1 h, water hold 12 h, air cool or furnace ⁄16 to ⁄16 (1.59 to 4.76), excl 0 0.002 (0.051)
3 1
quench cool
⁄16 to ⁄2 (4.76 to 12.70), excl 0 0.003 (0.076)
1 15
⁄2 to ⁄16 (12.70 to 23.81), incl 0.001 (0.025) 0.002 (0.051)
A
The purchaser shall designate on the purchase order or inquiry any partial stage
15 15
Over ⁄16 to 1 ⁄16 (23.81 to 49.2), 0.0015 (0.038) 0.003 (0.076)
of heat treatment required on the material to be shipped.
incl
15 1
Over 1 ⁄16 to 2 ⁄2 (49.2 to 63.5), incl 0.002 (0.051) 0.004 (0.102)
Bars:
1 3
⁄16 to ⁄16 (1.59 to 4.76), excl 0 0.002 (0.051)
3 1
⁄16 to ⁄2 (4.76 to 12.7), excl 0 0.003 (0.076)
A
Dimensions apply to the diameter of rods, to the distance between parallel
6. Mechanical Requirements
surfaces of hexagonal, octagonal, and square bar, and separately to the width and
thickness of rectangular bar.
6.1 Tensile and Hardness Requirements—The material shall
conformtotherequirementsfortensileandhardnessproperties
in Table 2.
6.2 Stress-Rupture Requirements—The material shall con-
form to the requirements for stress-rupture properties in Table
7.1.1 Out-of-Round—Cold-worked and hot-worked rod, all
3.
sizes, in straight lengths, shall not be out-of-round by more
thanonehalfthetotalpermissiblevariationsindiametershown
7. Dimensions and Permissible Variations
in Table 5 and Table 6, except for hot-worked rod ⁄2 in. (12.7
7.1 Diameter, Thickness, or Width—The permissible varia- mm) and under, which may be out-of-round by the total
tionsfromthespecifieddimensionsofcold-workedrodan
...
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