ASTM A456/A456M-08(2023)
Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings

Standard No.

ASTM A456/A456M-08(2023)

Release Date

2023

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM A456/A456M-08(2023)

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 A456 – 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. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM A456/A456M-08(2023) 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

ASTM A456/A456M-08(2023) history

• 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