ASTM B872-06(2016)

Standard Specification for Precipitation-Hardening Nickel Alloys Plate, Sheet, and Strip

ABSTRACT
This specification covers rolled precipitation hardenable UNS N09908, N09925, and N07725 nickel-iron-chromium-columbium-titanium-aluminum alloy plates, sheets, and strips in annealed condition. These materials are used as sheathing for superconductor cables, tooling for the fabrication of such cables and for other applications that require materials with low coefficients of expansion. Precipitation heat treatments for the materials entail heating to a specified temperature, holding at that temperature and then air or furnace cooling.
SCOPE
1.1 This specification covers rolled precipitation hardenable nickel-iron-chromium-columbium (Nb)-titanium-aluminum alloy (N09908) plate, sheet, and strip in the annealed condition (temper). This alloy is used as sheathing for super conductor cables, as tooling for fabrication of such cables, and for other applications requiring a material with low coefficient-of-expansion properties.  
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 Safety Data Sheet (SDS) 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.

General Information

• Status: Historical
• Publication Date: 31-May-2016
• ICS: 77.140.20 - Stainless steels
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.07 - Refined Nickel and Cobalt and Their Alloys

Relations

• Replaces: ASTM B872-06(2011) - Standard Specification for Precipitation-Hardening Nickel Alloys Plate, Sheet, and Strip
• Effective Date: 01-Jun-2016
• Replaced By: ASTM B872-19 - Standard Specification for Precipitation-Hardening Nickel Alloys Plate, Sheet, and Strip
• Effective Date: 01-Nov-2019
• Referred By: ASTM B906-22 - Standard Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip
• Effective Date: 01-Jun-2016

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B872 −06 (Reapproved 2016)
Standard Specification for
Precipitation-Hardening Nickel Alloys Plate, Sheet, and
Strip
This standard is issued under the fixed designation B872; 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 3. Terminology
3.1 Definitions of Terms Specific to This Standard:
1.1 This specification covers rolled precipitation hardenable
3.1.1 The terms given in Table 1 shall apply.
nickel-iron-chromium-columbium(Nb)-titanium-aluminumal-
loy (N09908) plate, sheet, and strip in the annealed condition
4. Ordering Information
(temper). This alloy is used as sheathing for super conductor
cables, as tooling for fabrication of such cables, and for other
4.1 Orders for material under this specification should
applications requiring a material with low coefficient-of-
include the following information:
expansion properties.
4.1.1 Alloy—Name or UNS number (see Table 2).
1.2 The values stated in inch-pound units are to be regarded
4.1.2 ASTM designation and year of issue.
as standard. The values given in parentheses are mathematical
4.1.3 Condition—See 6.1 and Appendix X1.
conversions to SI units that are provided for information only
4.1.4 Finish—See Appendix X1.
and are not considered standard.
4.1.5 Dimensions—Thickness, width, and length.
1.3 This standard does not purport to address all of the 4.1.6 Quantity.
safety concerns, if any, associated with its use. It is the
4.1.7 Optional Requirements:
responsibility of the user of this standard to become familiar
4.1.7.1 Sheet and Strip—Whether to be furnished in coil, in
with all hazards including those identified in the appropriate
cut straight lengths, or in random straight lengths.
Safety Data Sheet (SDS) for this product/material as provided
4.1.7.2 Strip—Whethertobefurnishedwithcommercialslit
by the manufacturer, to establish appropriate safety and health
edge, square edge, or round edge.
practices, and determine the applicability of regulatory limi-
4.1.7.3 Plate—Whether to be furnished specially flattened
tations prior to use.
(see 7.7); also how plate is to be cut (see 7.2.1 and 7.3.2).
4.1.8 Fabrication Details—Not mandatory but helpful to
2. Referenced Documents
the manufacturer:
2.1 ASTM Standards: 4.1.8.1 Welding or Brazing—Process to be employed.
E8Test Methods for Tension Testing of Metallic Materials
4.1.8.2 Plate—Whether material is to be hot-formed.
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 (see Section 15).
E228Test Method for Linear Thermal Expansion of Solid
4.1.10 Samples for Product (Check) Analysis—Whether
Materials With a Push-Rod Dilatometer
samples should be furnished (see 5.2).
E1473Test Methods for Chemical Analysis of Nickel, Co-
4.1.11 Purchaser Inspection—If the purchaser wishes to
balt and High-Temperature Alloys
witness the tests or inspection of material at the place of
manufacture,thepurchaseordermustsostateindicatingwhich
tests or inspections are to be witnessed (see Section 13).
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
5. Chemical Composition
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved June 1, 2016. Published June 2016. Originally
5.1 The material shall conform to the requirements as to
approved in 1996. Last previous edition approved in 2011 as B872–11. DOI:
chemical composition prescribed in Table 2.
10.1520/B0872-06R16.
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 [e-mail]. 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 prescribed in Table 2.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B872−06 (2016)
TABLE 1 Product Description
7.4.2 Straightness for coiled strip material is subject to
Product Thickness, in. (mm) Width agreement between the manufacturer and the purchaser.
A B
3 1
Hot-rolled plate ⁄16 to 2 ⁄4 (4.8 to 57.2) (Table 4) Table 6 and
7.5 Edges:
Table 7
C
Cold-rolled sheet 0.010 to 0.250 (0.25 to 6.4), incl Table 8 7.5.1 When finished edges of strip are specified in the
(Table 5)
contract or purchase order, the following descriptions shall
C
Cold-rolled strip 0.005 to 0.250 (0.13 to 6.4), incl Table 8
apply:
(Table 5)
7.5.1.1 Square-edge strip shall be supplied with finished
A
3 1
Material ⁄16 to ⁄4in.(4.8to6.4mm),incl,inthicknessmaybefurnishedassheet
edges, with sharp, square corners, and without bevel or
or plate provided the material meets the specification requirements for the
condition ordered.
rounding.
B
Hot-rolled plate, in widths 10 in. (250 mm) and under, may be furnished as
7.5.1.2 Round-edge strip shall be supplied with finished
hot-finished rectangles with sheared or cut edges provided the mechanical
edges, semicircular in form, and the diameter of the circle
property requirements of this specification are met.
C
Material under 48 in. (1219 mm) in width may be furnished as sheet or strip
forming the edge being equal to the strip thickness.
provided the material meets the specification requirements for the condition
7.5.1.3 When no description of any required form of strip
ordered.
edge is given, it shall be understood that edges such as those
resulting from slitting or shearing will be acceptable.
7.5.1.4 Sheet shall have sheared or slit edges.
6. Mechanical and Other Requirements
7.5.1.5 Plate shall have sheared or cut (machined, abrasive-
6.1 Tensile Properties—The material after precipitation cut, powder-cut, or inert-arc-cut) edges, as specified.
hardening shall conform to the tensile properties prescribed in
7.6 Squareness (Sheet)—For sheets of all thicknesses, the
Table 3.
angle between adjacent sides shall be 90 6 0.15° ( ⁄16 in. in 24
6.2 Coeffıcient of Thermal Expansion: in.) (1.6 mm in 610 mm).
6.2.1 The mean coefficient of thermal expansion from 77°F
7.7 Flatness—Standard flatness tolerances for plate shall
−6
(25°C) to 1292°F (700°C) shall not exceed 7.8×10 in./
conformtotherequirementsprescribedinTable10.“Specially
−6
in./°F (14.0×10 cm/cm/°C).
flattened” plate, when so specified, shall have permissible
6.2.2 The inflection temperature shall not exceed 572°F
variations in flatness as agreed upon between the manufacturer
(300°C).
and purchaser.
7. Dimensions and Permissible Variations
8. Workmanship, Finish, and Appearance
7.1 Thickness and Weight:
8.1 The material shall be uniform in quality and temper,
7.1.1 Plate—The permissible variation under the specified
smooth, commercially straight or flat, and free of injurious
thickness and permissible excess in overweight shall not
imperfections.
exceed the amounts prescribed in Table 4.
7.1.1.1 For use with Table 4, plate shall be assumed to
9. Sampling
3 3
weigh 0.292 lb/in. (8.08 g/cm ).
9.1 Lot—Definition:
7.1.2 Sheet and Strip—The permissible variations in thick-
9.1.1 A lot for chemical analysis shall consist of one heat.
ness of sheet and strip shall be as prescribed in Table 5. The
9.1.2 A lot for tension testing shall consist of all material
thickness of strip and sheet shall be measured with the
3 from the same heat, nominal thickness, and condition.
micrometer spindle ⁄8in. (9.5 mm) or more from either edge
9.1.2.1 Where material cannot be identified by heat, a lot
for material 1 in. (25.4 mm) or over in width and at any place
shallconsistofnotmorethan500lb(227kg)ofmaterialinthe
on the strip under 1 in. in width.
same thickness and condition, except for plates weighing over
7.2 Width or Diameter:
500 lb, in which case only one specimen shall be taken.
7.2.1 Plate—The permissible variations in width of rectan-
9.2 Test Material Selection:
gular plates and diameter of circular plates shall be as
9.2.1 Chemical Analysis—Representative samples shall be
prescribed in Table 6 and Table 7.
taken during pouring or subsequent processing.
7.2.2 Sheet and Strip—The permissible variations in width
9.2.1.1 Product (Check) Analysis shall be wholly the re-
for sheet and strip shall be as prescribed in Table 8.
sponsibility of the purchaser.
7.3 Length:
9.2.2 Tension and Coeffıcient of Thermal Expansion
7.3.1 Sheet and strip of all sizes may be ordered to cut
Testing—Samples of the material to provide test specimens for
lengths, in which case a variation of ⁄8 in. (3.2 mm) over the
tension and coefficient of thermal expansion testing shall be
specified length shall be permitted.
taken from such locations in each lot as to be representative of
7.3.2 Permissible variations in length of rectangular plate
that lot.
shall be as prescribed in Table 9.
7.4 Straightness: 10. Number of Tests
7.4.1 The edgewise curvature (depth of chord) of flat sheet,
10.1 Chemical Analysis—One test per lot.
strip, and plate shall not exceed 0.05 in. multiplied by the
10.2 Tension—One test per lot.
length of the product in feet (0.04 mm multiplied by the length
of the product in centimetres). 10.3 Coeffıcient of Thermal Expansion—One test per lot.
B872−06 (2016)
TABLE 2 Chemical Requirements
Product (Check) Analysis
Composition Limits, % Composition Limits, % Composition Limits, % Variations, Under min or
Element
N09908 N09925 N07725 Over max, of the Specified
Limit of Element
Nickel 47.0 min 42.0 min 55.0 min 0.35
51.0 max 46.0 max 59.0 max 0.35
Chromium 3.75 min 19.5 min 19.0 min 0.10
4.5 max 22.5 max 22.5 max 0.10
A A
Iron remainder 22.0 min remainder .
Manganese, max 1.0 1.0 0.35 0.03
Carbon, max 0.03 0.03 0.03 0.01
Copper . 1.5 min . 0.03
0.5 max 3.0 max .
Silicon, max 0.5 0.5 0.20 0.03
Sulfur, max 0.005 0.03 0.010 0.003
Aluminum 0.75 min 0.1 min . 0.10
1.25 max 0.5 max 0.35 max 0.10
Titanium 1.20 min 1.9 min 1.00 min 0.05
1.80 max 2.40 max 1.70 max 0.05
Columbium (Nb) 2.7 min . 2.75 min 0.10
3.3 max 0.5 max 4.00 max 0.15
Phosphorus 0.015 max 0.03 0.015 0.005
Boron 0.012 max . . 0.005
Cobalt 0.5 max . . 0.03
Molybdenum . 2.5 min 7.00 min 0.15
... 3.5 max 9.50 max 0.15
A
Iron shall be determined arithmetically by difference.
A
TABLE 3 Tensile Properties for Plate, Sheet, and Strip
11.2 Tension test specimens shall be any of the standard or
Yield Strength Elongation in 2 in.
subsize specimens shown in Test Methods E8.
Nominal Thickness, Tensile Strength,
(0.2 % offset), or 50 mm (or 4D),
in. (mm) min, ksi (MPa)
min, ksi (MPa) min % 11.3 In the event of disagreement, referee specimens shall
B
N09908
be as follows:
Up to 1.0 (25.4), incl 170 (1172) 120 (827) 12
11.3.1 Full thickness of the material machined to the form
Over 1.0 to 2.25 170 (1172) 120 (827) 10
(25.4 to 57.2), incl and dimensions shown for the sheet-type specimen in Test
C
N09925
Methods E8 for material under ⁄2 in. (12.7 mm) in thickness.
Up to 1.0 (25.4), incl 140 (965) 105 (724) 18
11.3.2 The largest possible round specimen shown in Test
Over 1.0 to 2.25 140 (965) 105 (724) 18
(25.4 to 57.2), incl Methods E8 for material ⁄2 in. (12.7 mm) and over.
D
N07725
11.4 Coefficient of thermal expansion test specimens may
Up to 1.0 (25.4), incl 150 (1034) 120 (827) 20
Over 1.0 to 2.25 150 (1034) 120 (827) 20
be taken from material in the annealed condition following the
(25.4 to 57.2), incl
final hot rolling, or in the annealed condition following any
A
Material shall be supplied in the annealed condition (temper). The manufacturer
subsequent cold rolling. The coefficient of thermal expansion
shall demonstrate that annealed material is capable of meeting the properties
test specimens shall be given the age hardening heat treatment
prescribed in Table 3 after precipitation heat treatment.
B
Precipitation heat treatment for N09908 shall consist of heating to 1292°F
prescribed in Table 3 prior to testing.
(700°C), holding at temperature for 50 h, and then air cooling.
C
Precipitation heat treatment for N09925 consists of 1365°F (740°C), hold at
12. Test Methods
temperature for 6 to 9 h, furnace cool to 1150°F (621°C), hold until total
precipitation heat treatment time has reached 18 h, air cool or faster.
12.1 The chemical composition, mechanical, and other
D
Precipitation heat treatment for N07725 consists of 1350°F (732°C) for 8 h
properties of the material as enumerated in this specification
followed by furnace cooling to 1500 to 1200°F (621 to 649°C), holding 8 h, and air
cooling. shall be determined, in case of disagreement, in accordance
with the following methods:
Test ASTM Designation
Chemical analysis E1473
11. Specimen Preparation
Tension E8
11.1 Tension test specimens shall be taken from material in
Rounding procedure E29
Coefficient of Thermal Expansion E228
the annealed condition (temper). The specimen shall be trans-
verse to the direction of rolling when width will permit. The 12.2 For purposes of determining compliance with the
test specimen shall be precipitation heat treated (see Table 3) specified limits for requirements of the properties listed in the
prior to testing. following table, an observed value or a calculated value shall
B872−06 (2016)
TABLE 4 Permissible Variations in Thickness and Overweight of Rectangular Plates
NOTE 1—All plates shall be ordered to thickness and not to weight per square foot (centimetre). No plates shall vary more than 0.01 in. (0.25 mm)
A
under the thickness ordered, and the overweight of each lot in each shipment shall not exceed the amount in the table. Spot grinding is permitted to
remove surface imperfections, such spots not to exceed 0.01 in. (0.25 mm) under the specified thickness.
B,C
Permissible Excess in Average Weight per Square Foot of Plates for Widths Given in Inches (Millimetres) Expressed in Percent-
age of Nominal Weights
Specified Thickness,
48 to 60 60 to 72 72 to 84 84 to 96 96 to 108 108 to 120 120 to 132 132 to 144 144 to 160
in. (mm)
Under 48
(1220 to (1520 to (1830 to (2130 to (2440 to (2740 to (3050 to (3350 to (3660 to
(1220)
1520), excl 1830), excl 2130), excl 2440), excl 2740), excl 3050), excl 3350), excl 3660), excl 4070), incl
3 5
⁄16 to ⁄16 (4.8 to 7.9), excl 9.0 10.5 12.0 13.5 15.0 16.5 18.0 . . .
5 3
⁄16 to ⁄8 (7.9 to 9.5), excl 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0 . .
3 7
⁄8 to ⁄16 (9.5 to 11.1), exc
...

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.
Designation: B872 − 06 (Reapproved 2011) B872 − 06 (Reapproved 2016)
Standard Specification for
Precipitation-Hardening Nickel Alloys Plate, Sheet, and
Strip
This standard is issued under the fixed designation B872; 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.
1. Scope
1.1 This specification covers rolled precipitation hardenable nickel-iron-chromium-columbium (Nb)-titanium-aluminum alloy
(N09908) plate, sheet, and strip in the annealed condition (temper). This alloy is used as sheathing for super conductor cables, as
tooling for fabrication of such cables, and for other applications requiring a material with low coefficient-of-expansion properties.
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)(SDS) 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:
E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E228 Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 The terms given in Table 1 shall apply.
4. Ordering Information
4.1 Orders for material under this specification should include the following information:
4.1.1 Alloy—Name or UNS number (see Table 2).
4.1.2 ASTM designation and year of issue.
4.1.3 Condition—See 6.1 and Appendix X1.
4.1.4 Finish—See Appendix X1.
4.1.5 Dimensions—Thickness, width, and length.
4.1.6 Quantity.
4.1.7 Optional Requirements:
4.1.7.1 Sheet and Strip—Whether to be furnished in coil, in cut straight lengths, or in random straight lengths.
4.1.7.2 Strip—Whether to be furnished with commercial slit edge, square edge, or round edge.
4.1.7.3 Plate—Whether to be furnished specially flattened (see 7.7); also how plate is to be cut (see 7.2.1 and 7.3.2).
4.1.8 Fabrication Details—Not mandatory but helpful to the manufacturer:
4.1.8.1 Welding or Brazing—Process to be employed.
This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on Refined
Nickel and Cobalt and Their Alloys.
Current edition approved June 1, 2011June 1, 2016. Published June 2011June 2016. Originally approved in 1996. Last previous edition approved in 20062011 as
B872 – 06.B872 – 11. DOI: 10.1520/B0872-06R11.10.1520/B0872-06R16.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’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
B872 − 06 (2016)
TABLE 1 Product Description
Product Thickness, in. (mm) Width
A B
3 1
Hot-rolled plate ⁄16 to 2 ⁄4 (4.8 to 57.2) (Table 4) Table 6 and
Table 7
C
Cold-rolled sheet 0.010 to 0.250 (0.25 to 6.4), incl Table 8
(Table 5)
C
Cold-rolled strip 0.005 to 0.250 (0.13 to 6.4), incl Table 8
(Table 5)
A 3 1
Material ⁄16 to ⁄4 in. (4.8 to 6.4 mm), incl, in thickness may be furnished as sheet
or plate provided the material meets the specification requirements for the
condition ordered.
B
Hot-rolled plate, in widths 10 in. (250 mm) and under, may be furnished as
hot-finished rectangles with sheared or cut edges provided the mechanical
property requirements of this specification are met.
C
Material under 48 in. (1219 mm) in width may be furnished as sheet or strip
provided the material meets the specification requirements for the condition
ordered.
4.1.8.2 Plate—Whether material is to be hot-formed.
4.1.9 Certification—State if certification or a report of test results is required (see Section 15).
4.1.10 Samples for Product (Check) Analysis—Whether samples should be furnished (see 5.2).
4.1.11 Purchaser Inspection—If the purchaser wishes to witness the tests or inspection of material at the place of manufacture,
the purchase order must so state indicating which tests or inspections are to be witnessed (see Section 13).
5. Chemical Composition
5.1 The material shall conform to the requirements as to chemical composition prescribed 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 prescribed in Table 2.
6. Mechanical and Other Requirements
6.1 Tensile Properties—The material after precipitation hardening shall conform to the tensile properties prescribed in Table 3.
6.2 Coeffıcient of Thermal Expansion:
− 6
6.2.1 The mean coefficient of thermal expansion from 77°F (25°C) to 1292°F (700°C) shall not exceed 7.8 × 10 in./in./°F
−6
(14.0 × 10 cm/cm/°C).
6.2.2 The inflection temperature shall not exceed 572°F (300°C).
7. Dimensions and Permissible Variations
7.1 Thickness and Weight:
7.1.1 Plate—The permissible variation under the specified thickness and permissible excess in overweight shall not exceed the
amounts prescribed in Table 4.
3 3
7.1.1.1 For use with Table 4, plate shall be assumed to weigh 0.292 lb/in. (8.08 g/cm ).
7.1.2 Sheet and Strip—The permissible variations in thickness of sheet and strip shall be as prescribed in Table 5. The thickness
of strip and sheet shall be measured with the micrometer spindle ⁄8 in. (9.5 mm) or more from either edge for material 1 in. (25.4
mm) or over in width and at any place on the strip under 1 in. in width.
7.2 Width or Diameter:
7.2.1 Plate—The permissible variations in width of rectangular plates and diameter of circular plates shall be as prescribed in
Table 6 and Table 7.
7.2.2 Sheet and Strip—The permissible variations in width for sheet and strip shall be as prescribed in Table 8.
7.3 Length:
7.3.1 Sheet and strip of all sizes may be ordered to cut lengths, in which case a variation of ⁄8 in. (3.2 mm) over the specified
length shall be permitted.
7.3.2 Permissible variations in length of rectangular plate shall be as prescribed in Table 9.
7.4 Straightness:
7.4.1 The edgewise curvature (depth of chord) of flat sheet, strip, and plate shall not exceed 0.05 in. multiplied by the length
of the product in feet (0.04 mm multiplied by the length of the product in centimetres).
7.4.2 Straightness for coiled strip material is subject to agreement between the manufacturer and the purchaser.
7.5 Edges:
7.5.1 When finished edges of strip are specified in the contract or purchase order, the following descriptions shall apply:
7.5.1.1 Square-edge strip shall be supplied with finished edges, with sharp, square corners, and without bevel or rounding.
B872 − 06 (2016)
TABLE 2 Chemical Requirements
Product (Check) Analysis
Composition Limits, % Composition Limits, % Composition Limits, % Variations, Under min or
Element
N09908 N09925 N07725 Over max, of the Specified
Limit of Element
Nickel 47.0 min 42.0 min 55.0 min 0.35
51.0 max 46.0 max 59.0 max 0.35
Chromium 3.75 min 19.5 min 19.0 min 0.10
4.5 max 22.5 max 22.5 max 0.10
A A
Iron remainder 22.0 min remainder .
Manganese, max 1.0 1.0 0.35 0.03
Carbon, max 0.03 0.03 0.03 0.01
Copper . 1.5 min . 0.03
0.5 max 3.0 max .
Silicon, max 0.5 0.5 0.20 0.03
Sulfur, max 0.005 0.03 0.010 0.003
Aluminum 0.75 min 0.1 min . 0.10
1.25 max 0.5 max 0.35 max 0.10
Titanium 1.20 min 1.9 min 1.00 min 0.05
1.80 max 2.40 max 1.70 max 0.05
Columbium (Nb) 2.7 min . 2.75 min 0.10
3.3 max 0.5 max 4.00 max 0.15
Phosphorus 0.015 max 0.03 0.015 0.005
Boron 0.012 max . . 0.005
Cobalt 0.5 max . . 0.03
Molybdenum . 2.5 min 7.00 min 0.15
... 3.5 max 9.50 max 0.15
A
Iron shall be determined arithmetically by difference.
A
TABLE 3 Tensile Properties for Plate, Sheet, and Strip
Yield Strength Elongation in 2 in.
Nominal Thickness, Tensile Strength,
(0.2 % offset), or 50 mm (or 4D),
in. (mm) min, ksi (MPa)
min, ksi (MPa) min %
B
N09908
Up to 1.0 (25.4), incl 170 (1172) 120 (827) 12
Over 1.0 to 2.25 170 (1172) 120 (827) 10
(25.4 to 57.2), incl
C
N09925
Up to 1.0 (25.4), incl 140 (965) 105 (724) 18
Over 1.0 to 2.25 140 (965) 105 (724) 18
(25.4 to 57.2), incl
D
N07725
Up to 1.0 (25.4), incl 150 (1034) 120 (827) 20
Over 1.0 to 2.25 150 (1034) 120 (827) 20
(25.4 to 57.2), incl
A
Material shall be supplied in the annealed condition (temper). The manufacturer
shall demonstrate that annealed material is capable of meeting the properties
prescribed in Table 3 after precipitation heat treatment.
B
Precipitation heat treatment for N09908 shall consist of heating to 1292°F
(700°C), holding at temperature for 50 h, and then air cooling.
C
Precipitation heat treatment for N09925 consists of 1365°F (740°C), hold at
temperature for 6 to 9 h, furnace cool to 1150°F (621°C), hold until total
precipitation heat treatment time has reached 18 h, air cool or faster.
D
Precipitation heat treatment for N07725 consists of 1350°F (732°C) for 8 h
followed by furnace cooling to 1500 to 1200°F (621 to 649°C), holding 8 h, and air
cooling.
7.5.1.2 Round-edge strip shall be supplied with finished edges, semicircular in form, and the diameter of the circle forming the
edge being equal to the strip thickness.
7.5.1.3 When no description of any required form of strip edge is given, it shall be understood that edges such as those resulting
from slitting or shearing will be acceptable.
7.5.1.4 Sheet shall have sheared or slit edges.
7.5.1.5 Plate shall have sheared or cut (machined, abrasive-cut, powder-cut, or inert-arc-cut) edges, as specified.
7.6 Squareness (Sheet)—For sheets of all thicknesses, the angle between adjacent sides shall be 90 6 0.15° ( ⁄16 in. in 24 in.)
(1.6 mm in 610 mm).
7.7 Flatness—Standard flatness tolerances for plate shall conform to the requirements prescribed in Table 10. “Specially
flattened” plate, when so specified, shall have permissible variations in flatness as agreed upon between the manufacturer and
purchaser.
B872 − 06 (2016)
TABLE 4 Permissible Variations in Thickness and Overweight of Rectangular Plates
NOTE 1—All plates shall be ordered to thickness and not to weight per square foot (centimetre). No plates shall vary more than 0.01 in. (0.25 mm)
A
under the thickness ordered, and the overweight of each lot in each shipment shall not exceed the amount in the table. Spot grinding is permitted to
remove surface imperfections, such spots not to exceed 0.01 in. (0.25 mm) under the specified thickness.
B,C
Permissible Excess in Average Weight per Square Foot of Plates for Widths Given in Inches (Millimetres) Expressed in Percent-
age of Nominal Weights
Specified Thickness,
48 to 60 60 to 72 72 to 84 84 to 96 96 to 108 108 to 120 120 to 132 132 to 144 144 to 160
in. (mm)
Under 48
(1220 to (1520 to (1830 to (2130 to (2440 to (2740 to (3050 to (3350 to (3660 to
(1220)
1520), excl 1830), excl 2130), excl 2440), excl 2740), excl 3050), excl 3350), excl 3660), excl 4070), incl
3 5
⁄16 to ⁄16 (4.8 to 7.9), excl 9.0 10.5 12.0 13.5 15.0 16.5 18.0 . . .
5 3
⁄16 to ⁄8 (7.9 to 9.5), excl 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0 . .
3 7
⁄8 to ⁄16 (9.5 to 11.1), excl 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0 19.5
7 1
⁄16 to ⁄2 (11.1 to 12.7), excl 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0
1 5
⁄2 to ⁄8 (12.7 to 15.9), excl 5.0 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5
5 3
⁄8 to ⁄4 (15.9 to 19.1), excl 4.5 5.5 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0
⁄4 to 1 (19.1 to 25.4), excl 4.0 4.5 5.5 6.0 7.0 7.5 9.0 10.5 12.0 13.5
1 to 2 ⁄4 (25.4 to 57.2), incl 5.0 5.0 5.5 6.5 7.0 8.0 8.5 10.0 11.5 13.0
A
The term “lot” applied to this table means all of the plates of each group width and each group thickness.
B
The permissible overweight for lots of circular and sketch plates shall be 25 % greater than the amounts given in this table.
C
The weight of individual plates shall not exceed the nominal weight by more than 1 ⁄4 times the amount given in this table and Table Footnote B.
TABLE 5 Permissible Variations in Thickness of Sheet and Strip
NOTE 1—Permissible variations, plus and minus, in thickness, in. (mm), for widths given in in. (mm).
Sheet
Hot-Rolled Cold-Rolled
Specified Thickness, in. (mm)
Over 48 to 60 (1220 to 1520), Over 48 to 60 (1220 to
A A
48 (1220) and Under 48 (1220) and Under
A A
incl 1520), incl
0.018 to 0.025 (0.46 to 0.64), incl 0.003 (0.08) 0.004 (0.10) 0.002 (0.05) 0.003 (0.08)
Over 0.025 to 0.034 (0.64 to 0.86), incl 0.004 (0.10) 0.005 (0.13) 0.003 (0.08) 0.004 (0.10)
Over 0.034 to 0.043 (0.86 to 1.1), incl 0.005 (0.13) 0.006 (0.15) 0.004 (0.10) 0.005 (0.13)
Over 0.043 to 0.056 (1.1 to 1.4), incl 0.005 (0.13) 0.006 (0.15) 0.004 (0.10) 0.005 (0.13)
Over 0.056 to 0.070 (1.4 to 1.8), incl 0.006 (0.15) 0.007 (0.18) 0.005 (0.13) 0.006 (0.15)
Over 0.070 to 0.078 (1.8 to 2.0), incl 0.007 (0.18) 0.008 (0.20) 0.006 (0.15) 0.007 (0.18)
Over 0.078 to 0.093 (2.0 to 2.4), incl 0.008 (0.20) 0.009 (0.23) 0.007 (0.18) 0.008 (0.20)
Over 0.093 to 0.109 (2.4 to 2.8), incl 0.009 (0.23) 0.010 (0.25) 0.007 (0.18) 0.009 (0.23)
Over 0.109 to 0.125 (2.8 to 3.2), incl 0.010 (0.25) 0.012 (0.31) 0.008 (0.20) 0.010 (0.25)
Over 0.125 to 0.140 (3.2 to 3.6), incl 0.012 (0.31) 0.014 (0.36) 0.008 (0.20) 0.010 (0.25)
Over 0.140 to 0.171 (3.6 to 4.3), incl 0.014 (0.36) 0.016 (0.41) 0.009 (0.23) 0.012 (0.31)
Over 0.171 to 0.187 (4.3 to 4.8), incl 0.015 (0.38) 0.017 (0.43) 0.010 (0.25) 0.013 (0.33)
Over 0.187 to 0.218 (4.8 to 5.5), incl 0.017 (0.43) 0.019 (0.48) 0.011 (0.28) 0.015 (0.38)
Over 0.218 to 0.234 (5.5 to 5.9), incl 0.018 (0.46) 0.020 (0.51) 0.01
...