ASTM B637 - 12e1

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

    Active Standard ASTM B637 | Developed by Subcommittee: B02.07

    Book of Standards Volume: 02.04


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    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 maxA

    1.0 maxA

    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

    remainderB

    Copper

    0.5 max

    0.1 max

    ...

    0.50 max

    0.15 max

    0.50 max

    0.30 max

    Nickel

    remainderB

    remainderB

    remainderB

    remainderB

    remainderB

    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

    remainderB

     

     

     

    Copper

    ...

    0.50 max

    1.5–3.0

    ...

     

     

     

    Zirconium

    ...

    0.050 max

    ...

    ...

     

     

     

    Vanadium

    ...

    0.10 max†

    ...

    ...

     

     

     

    Nickel

    remainderB

    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


    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/B0637-12E01

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