ASTM A 986/A 986M Standard Specification for Magnetic Particle Examination of Continuous Grain Flow Crankshaft Forgings
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ASTM A 986/A 986M Document Information:
Title
Standard Specification for Magnetic Particle Examination of Continuous Grain Flow Crankshaft Forgings
ASTM International
Publication Date:
Sep 10, 2001
Scope:
This specification covers the magnetic particle examination of forged continuous grain flow (CGF) crankshafts intended for medium speed diesel engines.
For the purpose of magnetic particle indication assessment, the crankshaft is divided into four zones of decreasing operational stress. Acceptance criteria have been set for each zone.
The engines to which these crankshafts are fitted are commonly used for diesel electric locomotives, marine propulsion, and power generation. Engines fueled by natural gas also fall into this medium speed category.
Specification A 983/A 983M is a product specification that covers the manufacture of CGF crankshafts.
The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
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