ASTM B637

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.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. 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).

TABLE 1 Chemical Requirements


Element	Composition Limits, %
	UNS N07022	UNS N07208	UNS N07252 (Formerly Grade 689)	UNS N07001 (Formerly Grade 685)	UNS N07500 (Formerly Grade 684)	UNS N07750 (Formerly Grade 688)	UNS N07718 (Formerly Grade 718)
Carbon	0.010 max	0.04???0.08	0.10???0.20	0.03???0.10	0.15 max	0.08 max	0.08 max
Manganese	0.5 max	0.3 max	0.50 max	1.00 max	0.75 max	1.00 max	0.35 max
Silicon	0.08 max	0.15 max	0.50 max	0.75 max	0.75 max	0.50 max	0.35 max
Phosphorus	0.025 max	0.015 max	0.015 max	0.030 max	0.015 max	...	0.015 max
Sulfur	0.015 max	0.015 max	0.015 max	0.030 max	0.015 max	0.01 max	0.015 max
Chromium	20.0???21.4	18.5???20.5	18.00???20.00	18.00???21.00	15.00???20.00	14.00???17.00	17.0???21.0
Cobalt	1.0 max	9.0???11.0	9.00???11.00	12.00???15.00	13.00???20.00	1.00 max^A	1.0 max^A
Molybdenum	15.5???17.4	8.0???9.0	9.00???10.50	3.50???5.00	3.00???5.00	...	2.80???3.30
Columbium (Nb) + tantalum	...	...	...	...	...	0.70???1.20	4.75???5.50
Titanium	...	1.90???2.30	2.25???2.75	2.75???3.25	2.50???3.25	2.25???2.75	0.65???1.15
Aluminum	0.5 max	1.38???1.65	0.75???1.25	1.20???1.60	2.50???3.25	0.40???1.00	0.20???0.80
Zirconium	...	0.020 max	...	0.02???0.12	...	...	...
Boron	0.006 max	0.003???0.010	0.003???0.01	0.003???0.01	0.003???0.01	...	0.006 max
Iron	1.8 max	1.5 max	5.00 max	2.00 max	4.00 max	5.00???9.00	remainder^B
Copper	0.5 max	0.1 max	...	0.50 max	0.15 max	0.50 max	0.30 max
Nickel	remainder^B	remainder^B	remainder^B	remainder^B	remainder^B	70.00 min	50.0???55.0
Tantalum	0.2 max	0.1 max	...	...	...	...	...
Columbium (Niobium)	...	0.2 max	...	...	...	...	...
Tungsten	0.8 max	0.5 max	...	...	...	...	...
	UNS N07080 (Formerly Grade 80A)	UNS N07752	UNS N09925	UNS N07725
Carbon	0.10 max	0.020???0.060	0.03 max	0.03 max
Manganese	1.00 max	1.00 max	1.0 max	0.35 max
Silicon	1.00 max	0.50 max	0.5 max	0.20 max
Phosphorus	...	0.008 max	0.03 max	0.015 max
Sulfur	0.015 max	0.003 max	0.03 max	0.010 max
Chromium	18.00???21.00	14.50???17.00	19.5???22.5???	19.00???22.50???
Cobalt	...	0.050 max	...	...
Molybdenum	...	...	2.5???3.5	7.00???9.50
Columbium (Nb) + tantalum	...	0.70???1.20	0.5 max (Nb only)	2.75???4.00
Titanium	1.80???2.70	2.25???2.75	1.9???2.40	1.00???1.70
Aluminum	0.50???1.80	0.40???1.00	0.1???0.5	0.35 max
Boron	...	0.007 max	...	...
Iron	3.00 max	5.00???9.00	22.0 min	remainder^B
Copper	...	0.50 max	1.5???3.0	...
Zirconium	...	0.050 max	...	...
Vanadium	...	0.10 max???	...	...
Nickel	remainder^B	70.0 min	42.0???46.0	55.0???59.0

^A If determined.

^B The element shall be determined arithmetically by difference.

??? Chromium content was corrected editorially.

??? Vanadium content was corrected editorially

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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
E8 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
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys

Keywords

bar; billet; forging; N07001; N07022; N07208; N07080; N07252; N07500; N07718; N07725; N07750; N07752; N09925; ICS Number Code 9925; 77.150.40 (Nickel and chromium products)

ICS Code

DOI: 10.1520/B0637-12E01

ASTM International is a member of CrossRef.

ASTM B637 (Nonferrous Metal Standards and Nonferrous Alloy Standards)

Citing ASTM Standards

[Back to Top]

ASTM B637 - 12e1

ASTM B637 - 12e1 Standard Specification for Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service

ASTM B637 (Nonferrous Metal Standards and Nonferrous Alloy Standards)