Historical
ASTM A456/A456M-08
Standard Specification for Magnetic Particle Examination of Large Crankshaft
Forgings
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 this specification).
1.2.3 Class 3 (formerly covered in Supplementary Requirement S1 of Specification A 456 – 64 (1970)).
1.3 This specification is not intended to cover continuous grain flow crankshafts (see Specification A 983/A 983M Note 1—Specification A 668/A 668M
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.5 Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch units.
Content Provider
ASTM International [astm]
