ASTM A983/A983M-04

Standard Specification for Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines

STANDARD published on 1.3.2004

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The information about the standard:

Designation standards: ASTM A983/A983M-04
Note: WITHDRAWN
Publication date standards: 1.3.2004
SKU: NS-5165
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Annotation of standard text ASTM A983/A983M-04 :

Keywords:

crankshafts, continuous grain flow, medium speed diesel engines, steel forgings, surface hardening, ICS Number Code 27.020 (Internal combustion engines)

Additional information

1. Scope

1.1 This specification covers continuous grain flow forged carbon and alloy steel crankshafts for medium speed diesel and natural gas engines.

1.2 The steel used in the manufacture of the forgings is required to be vacuum degassed.

1.3 Provision is made for treatment of designated surfaces of the crankshaft to provide enhanced fatigue strength, or wear resistance, or both.

1.4 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standards. Within the text and tables the SI units are shown in brackets. The values stated in each system are not exact equivalents, therefore each system must 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-pound units.

1.6 Except as specifically required in this specification, all provisions of Specification A 788 apply.

2. Referenced Documents

A370-24a	Standard Test Methods and Definitions for Mechanical Testing of Steel Products (Includes all amendments and changes 10/29/2024).
A503/A503M-25	Standard Specification for Ultrasonic Examination of Forged Crankshafts
A788/A788M-25a	Standard Specification for Steel Forgings, General Requirements (Includes all amendments and changes 5/12/2025).
A966/A966M-15(2025)	Standard Practice for Magnetic Particle Examination of Steel Forgings Using Alternating Current
A986/A986M-01(2026)	Standard Specification for Magnetic Particle Examination of Continuous Grain Flow Crankshaft Forgings
E45-25	Standard Test Methods for Determining the Inclusion Content of Steel
E112-25	Standard Test Methods for Determining Average Grain Size
E340-23	Standard Practice for Macroetching Metals and Alloys
AWS D1.1

JIS G 0555	Microscopic Testing Method for the Non-Metallic Inclusions in Steel Available from Japanese Standards Association (JSA), Mita MT Bldg., 3-13-12 Mita, Minato-ku, Tokyo 108-0073, Japan, http://www.jsa.or.jp.

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