ASTM A503/A503M-99

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

• Replaced By: ASTM A503/A503M-01 - Standard Specification for Ultrasonic Examination of Forged Crankshafts
• Effective Date: 10-Mar-2001
• 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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 503/A 503M – 99 An American National Standard
Standard Specification for
Ultrasonic Examination of Forged Crankshafts
This standard is issued under the fixed designation A 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.
1. Scope 3.1.1 continuous grain flow crankshafts—produced by a
process in which the solidification centerline of the original
1.1 This is an acceptance specification for the ultrasonic
ingot or starting stock is maintained through the main bearings,
inspection of forged steel crankshafts having main bearing
webs, crankpins, and flanges of the finished crankshaft, usually
journals or crankpins 4 in. [100 mm] or larger in diameter.
by means of closed die forging.
1.2 This specification covers the testing equipment required
3.1.2 solid (slab) forged crankshafts—made from open die
and the test procedure to be followed, and it defines the critical
forgings such that the grain flow in the webs is essentially
and noncritical areas and limits of acceptance.
parallel to the major axis of the forging and the crankpins are
1.3 This specification is intended to cover both continuous
offset from the forging centerline by machining. They may be
grain flow (CGF) crankshafts for medium and high speed
set in the correct orientation by a hot twisting operation.
diesel engines as well as solid (slab) forged crankshafts for
other applications.
4. Ordering Information
1.4 The values stated in either inch-pound units or SI
4.1 It is necessary that the crankshaft be identified as being
(metric) units are to be regarded separately as the standard.
either continuous grain flow or solid (slab) forged.
Within the text and tables, the SI units are shown in brackets.
4.2 Unless otherwise specified by means of supplementary
The values stated in each system shall be used independently of
ordering information, the test methods and acceptance criteria
the other. Combining values from the two systems may result
for the appropriate crankshaft type shall be used.
in nonconformance with the specification.
1.5 Unless the order specifies the applicable “M” specifica-
5. Apparatus and Personnel Requirements
tion designation, the inch-pound units shall be used.
5.1 The apparatus and personnel requirements shall be in
1.6 This standard does not purport to address all of the
accordance with Practice A 388/A 388M. For standardization
safety concerns, if any, associated with its use. It is the
purposes, it is recommended that final acceptance be based on
responsibility of the user of this standard to establish appro-
the use of 2–5 MHz transducers.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
6. Critical Sections
6.1 The division of a crankshaft into three volumetric zones,
2. Referenced Documents
as shown in Fig. 1 and Fig. 2, for the purpose of ultrasonic
2.1 ASTM Standards:
examination evaluation is applicable to both solid (slab) forged
A 388/A 388M Practice for Ultrasonic Examination of
2 and continuous grain flow crankshafts.
Heavy Steel Forgings
6.2 The major critical sections shown as Zone 1 in Fig. 1
E 428 Practice for Fabrication and Control of Steel Refer-
3 include the heavily loaded areas of the crankpins, webs, and
ence Blocks Used in Ultrasonic Inspection
4 main bearings.
2.2 American National Standard:
6.3 The minor critical sections shown as Zone 2 in Fig. 1
ANSI B46.1, Surface Texture
include the balance of the surface areas of the main bearing and
3. Terminology crankpin journals and adjacent fillets, flanges, and gear fit
areas.
3.1 Definitions:
6.4 The balance of the crankshaft as shown in Fig. 1,
including the remaining sections of the webs, is included in
Zone 3.
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
Stainless Steel and Related Alloys, and is the direct responsibility of Subcommittee
7. Calibration of Ultrasonic Equipment on Crankshaft
A01.06 on Steel Forgings and Billets.
Current edition approved Sept. 10, 1999. Published November 1999. Originally
7.1 For solid (slab) forged crankshafts, the sensitivity of the
published as A 503–64. Last previous edition A 503–75(1994).
instrument shall be adjusted so that the thickness to be
Annual Book of ASTM Standards, Vol 01.05.
examined will give a full-scale back reflection. Such calibra-
Annual Book of ASTM Standards, Vol 03.03.
Available from American National Standards Institute, 11 W. 42nd St., 13th
tions shall be done in an
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