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ASTM A456/A456M-99

Historical Revision

Standard Specification for Magnetic Particle Examination of Large Crankshaft<brk/> Forgings

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1.1 This is an acceptance specification for the magnetic particle inspection of forged steel crankshafts having main bearing journals or crankpins 4 in. [200 mm] or larger in diameter.

1.2 There are three classes, with acceptance standards of increasing severity:

1.2.1 Class 1.

1.2.2 Class 2 (originally the sole acceptance standard of Specification A456).

1.2.3 Class 3 (formerly covered in Supplementary Requirement S1 of Specification A456-64 (1970)).

1.3 This specification is not written to cover diesel locomotive crankshafts specifically, but Class 2 or 3 may be applied if manufacturer and ultimate user agree to its use.

Note-Specification A668/A 688M is a product specification which may be used for crankshaft forgings.

1.4 The values stated in either inches or SI (metric) units are to be regarded separately as the standard. Within the text and figures, the SI units are shown in brackets. 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.

1.5 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch units.


SDO ASTM: ASTM International
Document Number A456
Publication Date Sept. 10, 1999
Language en - English
Page Count 4
Revision Level 99
Supercedes
Committee A01.06
Publish Date Document Id Type View
May 1, 2024 A0456_A0456M-24 Revision
Oct. 1, 2008 A0456_A0456M-08 Revision
Sept. 10, 1999 A0456_A0456M-99 Revision
March 15, 2023 A0456_A0456M-08R23 Reaffirmation
March 1, 2018 A0456_A0456M-08R18 Reaffirmation
April 1, 2013 A0456_A0456M-08R13 Reaffirmation
Oct. 1, 2003 A0456_A0456M-99R03 Reaffirmation