ASTM A319-71(2020)

Annotation of standard text ASTM A319-71(2020) :

This specification covers gray iron castings exposed to elevated temperatures for non-pressure containing parts such as grate bars, stoker links, stoker parts, oil still furnace parts, firebox parts, ingot molds, glass molds, caustic pots, and metal melting pots. The three classes of gray iron covered here are: Class I, possessing superior thermal shock resistance; Class II, possessing average thermal shock resistance and moderately good tensile strength; and Class III, possessing a higher tensile strength than either Classes I or II. It is the intention of this specification to classify the irons in accordance with their carbon content equivalent, wherein the equation for its calculation is given herein.


Keywords:
chemical composition, elevated temperature, gray iron, iron castings, non-pressure containing, tensile strength ,, ICS Number Code 77.140.80 (Iron and steel castings)