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ASTM A983/A983M-04

(Specification)

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

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

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.

General Information

Status
Historical
Publication Date
29-Feb-2004
ICS
27.020 - Internal combustion engines
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.06 - Steel Forgings and Billets
Current Stage
Ref Project

Relations

Replaced By
ASTM A983/A983M-05 - Standard Specification for Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines
Effective Date
01-Oct-2005

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ASTM A983/A983M-04 - Standard Specification for Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel EnginesASTM A983/A983M-04 - Standard Specification for Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines
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ASTM A983/A983M-04 - Standard Specification for Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A 983/A 983M – 04
Standard Specification for
Continuous Grain Flow Forged Carbon and Alloy Steel
1
Crankshafts for Medium Speed Diesel Engines
This standard is issued under the fixed designationA 983/A 983M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (ε) indicates an editorial change since the last revision or reapproval.
1. Scope* E 45 Practice for Determining the Inclusion Content of
Steel
1.1 This specification covers continuous grain flow forged
E 112 Test Methods for Determining Average Grain Size
carbon and alloy steel crankshafts for medium speed diesel and
E 340 Test Method for Macro Etching Metals and Alloys
natural gas engines.
2.2 Other Standards:
1.2 The steel used in the manufacture of the forgings is
3
AWS D1.1 Structural Welding Code
required to be vacuum degassed.
4
DIN 50 602
1.3 Provision is made for treatment of designated surfaces
5
JIS G 0555
of the crankshaft to provide enhanced fatigue strength, or wear
resistance, or both.
3. Ordering Information
1.4 The values stated in either inch-pound units or SI
3.1 In addition to the ordering requirements of Specification
(metric) units are to be regarded separately as standards.
A 788, the following items should be included:
Within the text and tables the SI units are shown in brackets.
3.2 Whether surface hardening in designated areas is re-
The values stated in each system are not exact equivalents,
quired, referencing Supplementary Requirements S10, S11, or
therefore each system must be used independently of the other.
S12, and providing the necessary instructions.
Combining values from the two systems may result in noncon-
3.3 For crankshafts designed to include welded counter-
formance with the specification.
weightsthepurchasermayspecifyanalternateweldingcodeto
1.5 Unless the order specifies the applicable “M” specifica-
AWS D1.1 Structural Welding Code.
tion designation, the material shall be furnished to the inch-
3.4 For alternate tensile and hardness test requirements
pound units.
specify Supplementary Requirement S2.
1.6 Except as specifically required in this specification, all
provisions of Specification A 788 apply.
4. Materials and Manufacture
4.1 Melting Practice:
2. Referenced Documents
2 4.1.1 The steel making section of Specification A 788 shall
2.1 ASTM Standards:
apply together with mandatory vacuum degassing.
A 370 Test Methods and Definitions for MechanicalTesting
4.1.2 Supplementary Requirement S1 may be used if non-
of Steel Products
metallic inclusion rating of the steel is required.
A 503 Specification for Ultrasonic Examination of Forged
4.2 Forging:
Crankshafts
4.2.1 The use of bar from starting stock produced by slitting
A 788 Specification for Steel Forgings, General Require-
a rectangular section is not permitted.
ments
4.2.2 The procedure used in forging the crankshaft shall
A 966/A 966M Test Method for Magnetic Particle Exami-
ensure that the centerline of the starting forged or rolled bar
nation of Steel Forgings Using Alternate Current
will follow the centerline contour of the main bearings, webs,
A 986/A 986M Specification for Magnetic Particle Exami-
and crankpins of the crankshaft.
nation of Continuous Grain Flow Crankshaft Forgings
4.2.3 The grain flow present between adjacent main bearing
journals, webs, and the intervening crankpin shall be demon-
strated for the first article testing of a new crankshaft design by
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
A01.06 on Steel Forgings and Billets.
3
Current edition approved March 1, 2004. Published April 2004. Originally Available from American Welding Society, 550 NW Le Jeune Rd., Miami, FL
approved in 1998. Last previous edition approved in 2001 A 983/A 983M–01. 33126.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Verlag Stahleisen mbh, Postfach 8229, D-4000 Dusseldorf,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Germany.
5
Standards volume information, refer to the standard’s Document Summary page on Available from Japanese Standards Association, 1-24 Akasaka 4, Minato-Ku,
the ASTM website. Tokyo 107, Japan.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
A 983/A 983M – 04
a given forging facility. This need not be repeated for other Table1forthechosengrade,andtherequirementsagreedupon
crankshafts of the same design that differ fro
...

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This specification deals with continuous grain flow carbon and alloy steel crankshaft forgings intended for medium speed diesel and natural gas engines. The steel used in the manufacture of the forgings is required to be vacuum degassed. Heat treatment, which may be done either before or after rough machining, shall consist of normalizing followed by tempering at a subcritical temperature, or austenitizing, liquid quenching and subcritical tempering. Charpy impact and tensile tests, which shall be performed at a frequency of one test per heat treatment load, shall be used to evaluate tensile strength, yield strength, elongation, reduction of area, and Brinell hardness requirements of forgings. Chemical composition requirements shall also be examined by heat analysis. Grain size tests and non-destructive magnetic particle examinations shall be conducted as well. When required by the purchaser, crankshafts may be surface hardened in designated areas for the purposes of enhanced wear resistance and fatigue strength.
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1.1 This specification covers continuous grain flow forged carbon and alloy steel crankshafts for medium speed diesel and natural gas engines.  
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1.6 Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch-pound units.  
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5.1 This test method was developed to assess the performance of an engine oil to control engine wear and deposits under heavy-duty operating conditions selected to accelerate soot generation, valve train wear, and deposit formation in a turbocharged, aftercooled four-stroke-cycle diesel engine equipped with exhaust gas recirculation hardware.  
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Section  
Scope  
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6  
Test Engine Configuration  
6.1  
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Oil Heat Exchanger, Adapter Blocks, Block Off Plate  
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1.1 This specification covers preformed expansion joint fillers made from closed-cell polypropylene foam materials having suitable compressibility, recovery from compression, nonextruding, and weather-resistant characteristics.  
1.1.1 Type I, closed-cell polypropylene foam.  
1.2 These joint fillers are intended for use in concrete pavements in full-depth joints. There are several variations in size with typical thicknesses of 1/2 in. (12.7 mm), 3/4 in. (19.05 mm), and 1 in. (25.4 mm); typical widths of 31/2 in. (88.9 mm), 4 in. (101.6 mm), 5 in. (127 mm), 6 in. (152.5 mm), 7 in. (177.8 mm), 8 in. (203.2 mm), or 48 in. (1.2 m) sheet; and typical lengths of 5 ft (1.52 m) and 10 ft (3.05 m).  
1.3 The values stated in inch-pound units are to be regarded as the standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

  • Technical specification
    2 pages
    English language
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  • Technical specification
    2 pages
    English language
    sale 15% off