ASTM B637-23

Standard Specification for Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service

ABSTRACT
This specification covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for high-temperature service. Chemical analysis shall be performed on the alloy and shall conform to the chemical composition requirement in carbon, manganese, silicon, phosphorus, sulfur, chromium, cobalt, molybdenum, columbium, tantalum, titanium, aluminum, zirconium, boron, iron, copper, and nickel. The material shall follow recommended annealing treatment, solution treatment, stabilizing treatment, and precipitation hardening treatment. Tension testing, hardness testing and stress-rupture testing shall be performed on the material and shall comply to the required tensile strength, yield strength, elongation, reduction in area, and Brinell hardness.
SCOPE
1.1 This specification2 covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for moderate or high temperature service (Table 1).  
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, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Nov-2023
• ICS: 77.150.40 - Nickel and chromium products
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.07 - Refined Nickel and Cobalt and Their Alloys

Relations

• Replaces: ASTM B637-18 - Standard Specification for Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service
• Effective Date: 01-Dec-2023
• Referred By: ASTM F38-18 - Standard Test Methods for Creep Relaxation of a Gasket Material
• Effective Date: 01-Dec-2023
• Referred By: ASTM F1276-23 - Standard Test Method for Creep Relaxation of Laminated Composite Gasket Materials
• Effective Date: 01-Dec-2023
• Referred By: ASTM F2281-04(2017) - Standard Specification for Stainless Steel and Nickel Alloy Bolts, Hex Cap Screws, and Studs, for Heat Resistance and High Temperature Applications
• Effective Date: 01-Dec-2023
• Referred By: ASTM A1014/A1014M-16(2021) - Standard Specification for Precipitation-Hardening Bolting (UNS N07718) for High Temperature Service
• Effective Date: 01-Dec-2023
• Referred By: ASTM F1508-96(2021) - Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas, and Liquid Services
• Effective Date: 01-Dec-2023
• Referred By: ASTM F1370-92(2019)e1 - Standard Specification for Pressure-Reducing Valves for Water Systems, Shipboard
• Effective Date: 01-Dec-2023
• Referred By: ASTM F1511-18(2023) - Standard Specification for Mechanical Seals for Shipboard Pump Applications
• Effective Date: 01-Dec-2023
• Referred By: ASTM B670-07(2018) - Standard Specification for Precipitation-Hardening Nickel Alloy (UNS N07718) Plate, Sheet, and Strip for High-Temperature Service
• Effective Date: 01-Dec-2023

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B637 − 23
Standard Specification for
Precipitation-Hardening and Cold Worked Nickel Alloy Bars,
Forgings, and Forging Stock for Moderate or High
1
Temperature Service
This standard is issued under the fixed designation B637; 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.
1. Scope* Check Analysis Limits for Nickel, Nickel Alloys and
2 Cobalt Alloys
1.1 This specification covers hot- and cold-worked
B899 Terminology Relating to Non-ferrous Metals and Al-
precipitation-hardenable nickel alloy rod, bar, forgings, and
loys
forging stock for moderate or high temperature service (Table
E8/E8M Test Methods for Tension Testing of Metallic Ma-
1).
terials
1.2 The values stated in inch-pound units are to be regarded
E29 Practice for Using Significant Digits in Test Data to
as standard. The values given in parentheses are mathematical
Determine Conformance with Specifications
conversions to SI units that are provided for information only
E139 Test Methods for Conducting Creep, Creep-Rupture,
and are not considered standard.
and Stress-Rupture Tests of Metallic Materials
1.3 This standard does not purport to address all of the
E140 Hardness Conversion Tables for Metals Relationship
safety concerns, if any, associated with its use. It is the Among Brinell Hardness, Vickers Hardness, Rockwell
responsibility of the user of this standard to become familiar
Hardness, Superficial Hardness, Knoop Hardness, Sclero-
with all hazards including those identified in the appropriate scope Hardness, and Leeb Hardness
Safety Data Sheet (SDS) for this product/material as provided
E1473 Test Methods for Chemical Analysis of Nickel,
by the manufacturer, to establish appropriate safety, health, Cobalt, and High-Temperature Alloys
and environmental practices, and determine the applicability
3. Terminology
of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
3.1 Definitions:
dance with internationally recognized principles on standard-
3.1.1 For definitions of terms used in this specification, refer
ization established in the Decision on Principles for the
to Terminology B899.
Development of International Standards, Guides and Recom-
4. Ordering Information
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4.1 It is the responsibility of the purchaser to specify all
requirements that are necessary for material ordered under this
2. Referenced Documents
specification. Examples of such requirements include, but are
3
not limited to, the following:
2.1 ASTM Standards:
4.1.1 Alloy (Table 1).
B880 Specification for General Requirements for Chemical
4.1.2 Condition (temper or cold worked) (Tables 2 and 3
and 6.1).
4.1.3 Shape—Rod or bar (round, rectangle, square,
1
This specification is under the jurisdiction of ASTM Committee B02 on
hexagon, octagon).
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
4.1.3.1 Forging (sketch or drawing).
Current edition approved Dec. 1, 2023. Published December 2023. Originally
4.1.4 Dimensions, including length.
approved in 1970. Last previous edition addition approved in 2018 as B637 – 18.
4.1.5 Quantity (mass or number of pieces).
DOI: 10.1520/B0637-23.
2
4.1.6 Forging Stock—Specify if material is stock for reforg-
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SB-637 in Section II of that Code.
ing.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1.7 Finish.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4.1.8 Samples for Product (Check) Analysis—Whether
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. samples for product (check) analysis shall be furnished (9.2).
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B637 − 23
A
TABLE 1 Chemical Requirements
Element Composition Limits, %
UNS UNS UNS UNS UNS UNS UNS UNS
N07022 N07208 N07252 N07001 N07500 N07740 N07750 N07718
Carbon 0.010 0.04–0.08 0.10–0.20 0.03–0.10 0.15 0.005–0.08 0.08 0.08
Manganese 0.5 0.3 0.50 1.00 0.75
...

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: B637 − 18 B637 − 23
Standard Specification for
Precipitation-Hardening and Cold Worked Nickel Alloy Bars,
Forgings, and Forging Stock for Moderate or High
1
Temperature Service
This standard is issued under the fixed designation B637; 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.
1. Scope*
2
1.1 This specification covers hot- and cold-worked precipitation-hardenable nickel alloy rod, bar, forgings, and forging stock for
moderate or high temperature service (Table 1).
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, health, and environmental
practices, and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
B899 Terminology Relating to Non-ferrous Metals and Alloys
E8/E8M Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E139 Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness,
Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
3. Terminology
3.1 Definitions:
1
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 Nov. 1, 2018Dec. 1, 2023. Published December 2018December 2023. Originally approved in 1970. Last previous edition addition approved in
20162018 as B637B637 – 18. –16. DOI: 10.1520/B0637-18.10.1520/B0637-23.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SB-637 in Section II of that Code.
3
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’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B637 − 23
A
TABLE 1 Chemical Requirements
Element Composition Limits, %
UNS UNS UNS UNS UNS
UNS UNS N07252 N07001 N07500 UNS N07750 N07718
N07022 N07208 (Formerly (Formerly (Formerly N07740 (Formerly (Formerly
Grade 689) Grade 685) Grade 684) Grade 688) Grade 718)
Carbon 0.010 max 0.04–0.08 0.10–0.20 0.03–0.10 0.15 max 0.005–0.08 0.08 max 0.08 max
Carbon 0.010 0.04–0.08 0.10–0.20 0.03–0.10 0.15 0.005–0.08 0.08 0.08
Manganese 0.5 max 0.3 max 0.50 max 1.00 max 0.75 max 1.00 max 1.00 max 0.35 max
Manganese 0.5 0.3 0.50 1.00 0.75 1.00 1.00 0.35
Silicon 0.08 max 0.15 max 0.50 max 0.75 max 0.75 max 1.00 max 0.50 max 0.35 max
Silicon 0.08 0.15 0.50 0.75 0.75 1.00 0.50 0.35
Phosphorus 0.025 max 0.015 max 0.015 max 0.030 max 0.015 max 0.030 max . 0.015 max
Phosphorus 0.025 0.015 0.015 0.030 0.015 0.030 . 0.015
Sulfur 0.015 max 0.015 max 0.015 max 0.030 max 0.015 max 0.030 m
...