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ASTM A859/A859M-95(1999)

Historical Reaffirmation

Standard Specification for Age-Hardening Alloy Steel Forgings for Pressure Vessel Components

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1.1 This specification covers requirements for low-carbon age-hardening nickel-copper-chromium-molybdenum-columbium alloy steel forgings for pressure vessel components.

1.2 Forgings under this specification are available in two classes as follows:

1.2.1 Class 1 -Normalized-and-precipitation-heat-treated, providing a minimum yield strength of 55 ksi [380 MPa] and a minimum tensile strength of 65 ksi [450 MPa].

1.2.2 Class 2 -Quenched-and-precipitation-heat-treated, providing a minimum yield strength of 65 ksi [450 MPa] and a minimum tensile strength of 75 ksi [MPa].

1.3 Although the material is readily weldable, welding procedures are of fundamental importance and must be such as not to affect adversely the properties of the material, especially in the heat-affected zone. It is presupposed that welding procedures will be suitable for the material being welded.

1.4 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.

1.5 The values stated in either inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

1.6 This specification is expressed in both inch-pound and SI units. However, unless the order specifies the applicable "M" specification designation [SI units], the material shall be furnished to inch-pound units.


SDO ASTM: ASTM International
Document Number A859
Publication Date Sept. 10, 1999
Language en - English
Page Count 4
Revision Level 95(1999)
Supercedes
Committee A01.06
Publish Date Document Id Type View
Nov. 1, 2023 A0859_A0859M-23 Revision
March 1, 2019 A0859_A0859M-04R19E01 Revision
March 1, 2004 A0859_A0859M-04 Revision
Sept. 10, 2002 A0859_A0859M-02 Revision
Oct. 1, 2014 A0859_A0859M-04R14 Reaffirmation
April 1, 2009 A0859_A0859M-04R09 Reaffirmation
Sept. 10, 1999 A0859_A0859M-95R99 Reaffirmation