Standard Specification for Automotive Malleable Iron Castings
This specification covers standards for castings of ferritic, pearlitic, tempered pearlitic, and tempered martensitic grades of malleable iron used in automotive products and industries. Castings shall be heat treated and shall be of Grades M3210, M4504, M5003, M5503, M7002, and M8501. Materials shall conform to the specified hardness range. Materials shall follow specified microstructure requirements based on distribution of temper-carbon nodules in the metal matrix. All grades shall have a minimum concentration of spheroidal primary carbides in the microstructure.
1.1 This specification covers castings of ferritic, pearlitic, tempered pearlitic, and tempered martensitic grades of malleable iron used in the products of the automotive and allied industries. Castings shall be heat treated to meet this specification.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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