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Normas ASTM – AENOR
ASTM A962/A962M-07b

ASTM A962/A962M-07b

Standard Specification for Common Requirements for Steel Fasteners or Fastener Materials, or Both, Intended for Use at Any Temperature from Cryogenic to the Creep Range

Fecha:
2010-12-31 /Historical
Superseeded by:
Abstract:

This specification covers a group of common requirements that shall apply to carbon, alloy, and stainless steel fasteners or fastener materials, or both. These materials are intended for use at any temperature from cryogenic to the creep range. Requirements for the melting process and quality control procedures for ingot cast and strand cast products are detailed. Bars and fasteners shall be produced in accordance with the product specification. The chemical composition, as to heat and product analyses, shall conform to the limits of the product specification. Bars, fasteners, bolting materials, and specimen machined from fasteners shall meet the mechanical requirements which shall be determined by the following tests: (1) proof load test by mandrel/tension or compression methods, (2) cone proof load test, (3) impact test, and (4) hardness test. Assembly for the proof load and cone proof tests are illustrated. The depth of decarburization shall be determined by metallographic etching and if needed, microhardness testing.

Scope:

1.1 This specification covers a group of common requirements that shall apply to carbon, alloy and stainless steel fasteners or fastener materials, or both, under any of the following ASTM Specifications (or under any other ASTM Specifications that invoke this specification or portions thereof):

Title of SpecificationsASTM DesignationAlloy-Steel and Stainless Steel Bolting Materials for High-Temperature ServiceA 193/A 193MCarbon and Alloy Steel Nuts for Bolts for High Pressure and High-Temperature ServiceA 194/A 194MAlloy Steel Bolting Materials for Low-Temperature ServiceA 320/A 320MAlloy-Steel Turbine-Type Bolting Material Specially Heat Treated for High-Temperature ServiceA 437/A 437MHigh-Temperature Bolting Materials With Expansion Coefficients Comparable to Austenitic Stainless Steels A 453/A 453MAlloy-Steel Bolting Materials for Special Applications A 540/A 540MPrecipitation-Hardening Bolting Material (UNSN07718) for High Temperature ServiceA 1014/A 1014M

1.2 In case of conflict the requirements of the individual product specification shall prevail over those of this specification.

1.3 Additional requirements may be specified by mutual agreement between the purchaser and supplier.

1.4 Values stated in either inch-pound or SI units (metric) are to be regarded separately. The SI units are shown in brackets within the text and tables. The values stated in each system are not exact equivalents, therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. Inch-pound units shall apply unless the "M" designation of the product specification is specified in the order.

Keywords:
austenitic stainless steel; bolts, steel; fasteners, steel; nuts, steel; pressure vessel service; steel bars, alloy; steel bars, carbon; steel bars, stainless; steel bolting materials; stainless steel bolting materials; temperature service applications, high; temperature service applications, low; turbine materials
56,93
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