ASTM A456/A456M-08(2013) PDF

Scope: 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 A4568201;–8201;64 (1970)).

1.3 This specification is not intended to cover continuous grain flow crankshafts (see Specification A983/A983M); however, Specification A986/A986M may be used for this purpose.
Note 1—Specification A668/A668M is a product specification which may be used for slab-forged crankshaft forgings that are usually twisted in order to set the crankpin angles, or for barrel forged crankshafts where the crankpins are machined in the appropriate configuration from a cylindrical forging.

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.

ASTM A456/A456M-08(2013) Referenced Document

ASTM A275/A275M Standard Test Method for Magnetic Particle Examination of Steel Forgings
ASTM A668/A668M Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use
ASTM A966/A966M Standard Test Method for Magnetic Particle Examination of Steel Forgings Using Alternating Current
ASTM A983/A983M Standard Specification for Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines
ASTM A986/A986M Standard Specification for Magnetic Particle Examination of Continuous Grain Flow Crankshaft Forgings
ASTM E1417/E1417M Standard Practice for Liquid Penetrant Testing

2023 ASTM A456/A456M-08(2023) Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings
2008 ASTM A456/A456M-08(2018) Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings
2008 ASTM A456/A456M-08(2013) Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings
2008 ASTM A456/A456M-08 Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings
1999 ASTM A456/A456M-99(2003) Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings
1999 ASTM A456/A456M-99 Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings