ASTM A986/A986M-2001(2006)
连续晶粒流动曲轴锻件的磁粒子检验标准规范

Standard Specification for Magnetic Particle Examination of Continuous Grain Flow Crankshaft Forgings

标准号

ASTM A986/A986M-2001(2006)

发布日期

2001年

实施日期

废止日期

无

中国标准分类号

H26

国际标准分类号

77.140.85 (Iron and steel forgings)

发布单位

US-ASTM

适用范围

1.1 This specification covers the magnetic particle examination of forged continuous grain flow (CGF) crankshafts intended for medium speed diesel engines.

1.2 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.

1.3 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.

1.4 Specification A 983/A 983M is a product specification that covers the manufacture of CGF crankshafts.

1.5 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.