ASTM A503/A503M-01(2001)e1

Standard Specification for Ultrasonic Examination of Forged Crankshafts

SCOPE
1.1 This is an acceptance specification for the ultrasonic inspection of forged steel crankshafts having main bearing journals or crankpins 4 in. [100 mm] or larger in diameter.
1.2 This specification covers the testing equipment required and the test procedure to be followed, and it defines the critical and noncritical areas and limits of acceptance.
1.3 This specification is intended to cover both continuous grain flow (CGF) crankshafts for medium and high speed diesel engines as well as solid (slab) forged crankshafts for other applications.
1.4 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as the standard. Within the text and tables, the SI units are shown in brackets. The values stated in each system shall 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 inch-pound units shall be used.
1.6This 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Mar-2001
• ICS: 21.120.10 - Shafts
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.06 - Steel Forgings and Billets

Relations

• Replaces: ASTM A503/A503M-01 - Standard Specification for Ultrasonic Examination of Forged Crankshafts
• Effective Date: 10-Mar-2001
• Replaced By: ASTM A503/A503M-01(2006) - Standard Specification for Ultrasonic Examination of Forged Crankshafts
• Effective Date: 01-Mar-2006
• Referred By: ASTM A983/A983M-06(2021) - Standard Specification for Continuous Grain Flow Forged Carbon and Alloy Steel Crankshafts for Medium Speed Diesel Engines
• Effective Date: 10-Mar-2001

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
e1
Designation: A 503/A 503M – 01 (Reapproved 2001)
Standard Specification for
Ultrasonic Examination of Forged Crankshafts
This standard is issued under the fixed designationA 503/A 503M; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Keywords were added editorially in September 2001.
1. Scope ANSI B46.1, Surface Texture
1.1 This is an acceptance specification for the ultrasonic
3. Terminology
inspection of forged steel crankshafts having main bearing
3.1 Definitions:
journals or crankpins 4 in. [100 mm] or larger in diameter.
3.1.1 continuous grain flow crankshafts—produced by a
1.2 This specification covers the testing equipment required
process in which the solidification centerline of the original
and the test procedure to be followed, and it defines the critical
ingotorstartingstockismaintainedthroughthemainbearings,
and noncritical areas and limits of acceptance.
webs, crankpins, and flanges of the finished crankshaft, usually
1.3 This specification is intended to cover both continuous
by means of closed die forging.
grain flow (CGF) crankshafts for medium and high speed
3.1.2 solid (slab) forged crankshafts—made from open die
diesel engines as well as solid (slab) forged crankshafts for
forgings such that the grain flow in the webs is essentially
other applications.
parallel to the major axis of the forging and the crankpins are
1.4 The values stated in either inch-pound units or SI
offset from the forging centerline by machining. They may be
(metric) units are to be regarded separately as the standard.
set in the correct orientation by a hot twisting operation.
Within the text and tables, the SI units are shown in brackets.
Thevaluesstatedineachsystemshallbeusedindependentlyof
4. Ordering Information
the other. Combining values from the two systems may result
4.1 It is necessary that the crankshaft be identified as being
in nonconformance with the specification.
either continuous grain flow or solid (slab) forged.
1.5 Unless the order specifies the applicable “M” specifica-
4.2 Unless otherwise specified by means of supplementary
tion designation, the inch-pound units shall be used.
ordering information, the test methods and acceptance criteria
1.6 This standard does not purport to address all of the
for the appropriate crankshaft type shall be used.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Apparatus and Personnel Requirements
priate safety and health practices and determine the applica-
5.1 The apparatus and personnel requirements shall be in
bility of regulatory limitations prior to use.
accordance with Practice A 388/A 388M. For standardization
purposes, it is recommended that final acceptance be based on
2. Referenced Documents
the use of 2–5 MHz transducers.
2.1 ASTM Standards:
A 388/A 388M Practice for Ultrasonic Examination of
6. Critical Sections
Heavy Steel Forgings
6.1 Thedivisionofacrankshaftintothreevolumetriczones,
E 428 Practice for Fabrication and Control of Steel Refer-
as shown in Fig. 1 and Fig. 2, for the purpose of ultrasonic
ence Blocks Used in Ultrasonic Inspection
4 examination evaluation is applicable to both solid (slab) forged
2.2 American National Standard:
and continuous grain flow crankshafts.
6.2 The major critical sections shown as Zone 1 in Fig. 1
include the heavily loaded areas of the crankpins, webs, and
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys, and is the direct responsibility of Subcommittee
main bearings.
A01.06 on Steel Forgings and Billets.
6.3 The minor critical sections shown as Zone 2 in Fig. 1
Current edition approved March 10, 2001. Published March 2001. Originally
includethebalanceofthesurfaceareasofthemainbearingand
published as A 503–64. Last previous edition A 503/A 503M–99.
Annual Book of ASTM Standards, Vol 01.05. crankpin journals and adjacent fillets, flanges, and gear fit
Annual Book of ASTM Standards, Vol 03.03.
areas.
Available from American National Standards Institute, 11 W. 42nd St., 13th
Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
e1
A 503/A 503M – 01 (2001)
FIG. 1 Crankshaft UT Acceptance Zones
FIG. 3 Distance to Indication as Percentage of Cross-section
8.3 The crankshaft shall be scanned as shown in Fig. 2.
FIG. 2 Scanning Directions
9. Acceptance Criteria
9.1 Acceptance Zones:
6.4 The balance of the crankshaft as shown in Fig. 1,
9.1.1 For acceptance purposes, the crankshaft shall be
including
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