ASTM A503/A503M-15(2020)

ASTM A503/A503M-15(2020) is a technical specification published by ASTM International. Its full title is "Standard Specification for Ultrasonic Examination of Forged Crankshafts". This standard covers: ABSTRACT This specification deals with the acceptance specifications for the ultrasonic examination of forged steel crankshafts. This practice is applicable to both solid (slab) forged and continuous grain flow crankshafts. Specimens shall be divided into three volumetric zones, namely: the major critical sections (Zone 1), which includes the heavily loaded areas of the crankpins, webs, and main bearings; the minor critical sections (Zone 2), which includes the balance of the surface areas of the main bearing and crankpin journals and adjacent fillets, flanges, and gear fit areas; and Zone 3, which includes the balance of the crankshaft, and the remaining sections of the webs. The crankshafts shall be examined after heat treatment, but before machining geometric features such as chamfers and oil holes. Acceptance zones and criteria for both types of crankshafts are discussed briefly. 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 standard. Within the text and tables, the SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.5 Unless the order specifies the applicable “M” specification designation, the inch-pound units shall be used. 1.6 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. 1.7 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.

ABSTRACT This specification deals with the acceptance specifications for the ultrasonic examination of forged steel crankshafts. This practice is applicable to both solid (slab) forged and continuous grain flow crankshafts. Specimens shall be divided into three volumetric zones, namely: the major critical sections (Zone 1), which includes the heavily loaded areas of the crankpins, webs, and main bearings; the minor critical sections (Zone 2), which includes the balance of the surface areas of the main bearing and crankpin journals and adjacent fillets, flanges, and gear fit areas; and Zone 3, which includes the balance of the crankshaft, and the remaining sections of the webs. The crankshafts shall be examined after heat treatment, but before machining geometric features such as chamfers and oil holes. Acceptance zones and criteria for both types of crankshafts are discussed briefly. 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 standard. Within the text and tables, the SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.5 Unless the order specifies the applicable “M” specification designation, the inch-pound units shall be used. 1.6 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. 1.7 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.

ASTM A503/A503M-15(2020) is classified under the following ICS (International Classification for Standards) categories: 21.120.10 - Shafts. The ICS classification helps identify the subject area and facilitates finding related standards.

ASTM A503/A503M-15(2020) has the following relationships with other standards: It is inter standard links to ASTM A388/A388M-23, ASTM A788/A788M-19, ASTM A788/A788M-18b, ASTM A788/A788M-18a, ASTM A788/A788M-18, ASTM A788/A788M-17a, ASTM A788/A788M-17, ASTM A788/A788M-16a, ASTM A788/A788M-15, ASTM A788/A788M-14a, ASTM A788/A788M-14, ASTM A788/A788M-13, ASTM E428-08(2013), ASTM A788/A788M-11, ASTM A388/A388M-11. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ASTM A503/A503M-15(2020) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.