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  • ASTM
    A456/A456M-08(2013) Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings
    Edition: 2013
    $103.58
    Unlimited Users per year

Description of ASTM-A456 2013

ASTM A456 / A456M - 08(2013)

Standard Specification for Magnetic Particle Examination of Large Crankshaft Forgings

Active Standard ASTM A456 / A456M | Developed by Subcommittee: A01.06

Book of Standards Volume: 01.05




ASTM A456 / A456M

Abstract

This test method deals with the acceptance criteria for the magnetic particle examination of forged steel crankshafts and forgings having large main bearing journal or crankpin diameters. Covered here are three classes of forgings, which shall be evaluated under two areas of inspection, namely: major critical areas, and minor critical areas. During inspection, magnetic particle indications shall be classified as: surface indications, which include nonmetallic inclusions or stringers, open or twist cracks, flakes, or pipes; open or pinpoint indications; and non-open indications. Procedures for dimpling, depressing, inspection, and product marking are also mentioned.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. 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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

A275/A275M Practice for Magnetic Particle Examination of Steel Forgings

A668/A668M Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

A966/A966M Practice for Magnetic Particle Examination of Steel Forgings Using Alternating Current

A983/A983M Specification for Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines

A986/A986M Specification for Magnetic Particle Examination of Continuous Grain Flow Crankshaft Forgings

E1417 Practice for Liquid Penetrant Testing


Keywords

acceptance criteria; barrel forged crankshaft; crankshaft forgings; magnetic particle examination; nondestructive examination; slab forged crankshaft;


ICS Code

ICS Number Code 77.140.85 (Iron and steel forgings)


DOI: 10.1520/A0456_A0456M-08R13

ASTM International is a member of CrossRef.

ASTM A456 / A456M

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