ASTM B637-12

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

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    1. Scope

    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 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.

    TABLE 1 Chemical Requirements

    ElementComposition Limits, %
    UNS N07022UNS N07208UNS N07252
    (Formerly
    Grade 689)
    UNS N07001
    (Formerly
    Grade 685)
    UNS N07500
    (Formerly
    Grade 684)
    UNS N07750
    (Formerly
    Grade 688)
    UNS N07718
    (Formerly
    Grade 718)
    Carbon0.010 max0.040.080.100.200.030.100.15 max0.08 max0.08 max
    Manganese0.5 max0.3 max0.50 max1.00 max0.75 max1.00 max0.35 max
    Silicon0.08 max0.15 max0.50 max0.75 max0.75 max0.50 max0.35 max
    Phosphorus0.025 max0.015 max0.015 max0.030 max0.015 max...0.015 max
    Sulfur0.015 max0.015 max0.015 max0.030 max0.015 max0.01 max0.015 max
    Chromium20.021.418.520.518.0020.0018.0021.0015.0020.0014.0017.0017.021.0
    Cobalt1.0 max9.011.09.0011.0012.0015.0013.0020.001.00 maxA1.0 maxA
    Molybdenum15.517.48.09.09.0010.503.505.003.005.00...2.803.30
    Columbium
    (Nb) + tantalum
    ...............0.701.204.755.50
    Titanium...1.902.302.252.752.753.252.503.252.252.750.651.15
    Aluminum0.5 max1.381.650.751.251.201.602.503.250.401.000.200.80
    Zirconium...0.020 max...0.020.12.........
    Boron0.006 max0.0030.0100.0030.010.0030.010.0030.01...0.006 max
    Iron1.8 max1.5 max5.00 max2.00 max4.00 max5.009.00remainderB
    Copper0.5 max0.1 max...0.50 max0.15 max0.50 max0.30 max
    NickelremainderBremainderBremainderBremainderBremainderB70.00 min50.055.0
    Tantalum0.2 max0.1 max...............
    Columbium (Niobium)...0.2 max...............
    Tungsten0.8 max0.5 max...............
    UNS N07080
    (Formerly
    Grade 80A)
    UNS N07752UNS N09925UNS N07725
    Carbon0.10 max0.0200.0600.03 max0.03 max
    Manganese1.00 max1.00 max1.0 max0.35 max
    Silicon1.00 max0.50 max0.5 max0.20 max
    Phosphorus ...0.008 max0.03 max0.015 max
    Sulfur0.015 max0.003 max0.03 max0.010 max
    Chromium18.0021.0014.5017.0019.522.519.0022.50
    Cobalt...0.050 max......
    Molybdenum......2.53.57.009.50
    Columbium
    (Nb) + tantalum
    ...0.701.200.5 max (Nb only)2.754.00
    Titanium1.802.702.252.751.92.401.001.70
    Aluminum0.501.800.401.000.10.50.35 max
    Boron...0.007 max......
    Iron3.00 max5.009.0022.0 minremainderB
    Copper...0.50 max1.53.0...
    Zirconium...0.050 max......
    Vanadium...70.0 min......
    NickelremainderB70.0 min42.046.055.059.0

    A If determined.

    B The element shall be determined arithmetically by difference.

    Chromium content was corrected editorially.


    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


    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/B0637-12

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