ASTM B444-04

    Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloys (UNS N06625) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219) Pipe and Tube

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    1. Scope

    1.1 This specification covers nickel-chromium-molybdenum-columbium alloys (UNS N06625 and UNS N06852) and nickel-chromium-molybdenum-silicon alloy (UNS N06219)* in the form of cold-worked seamless pipe and tube. The general requirements for pipe and tube are covered by Specification B 829.

    1.1.1 UNS N06625 products are furnished in two grades of different heat-treated conditions:

    Grade 1 (annealed)

    Material is normally employed in service temperatures up to 1100°F (593°C).

    Grade 2 (solution annealed)

    Material is normally employed in service temperatures above 1100°F (593°C) when resistance to creep and rupture is required. Note 1

    Hot-working or reannealing may change properties significantly, depending on working history and temperatures.

    1.1.2 Alloys UNS N06219 and UNS N06852 are supplied in the solution annealed condition only.

    1.2 The following precautionary caveat pertains only to the test methods portion, Section , of this specification: 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 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

    B829 Specification for General Requirements for Nickel and Nickel Alloys Seamless Pipe and Tube


    ICS Code

    ICS Number Code 77.150.40 (Nickel and chromium products)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/B0444-04

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