ASTM A319 is a gray cast iron material used in non-pressure vessel components in high temperature environments. The standard was developed by the American Society for Testing and Materials (ASTM), first published in 1971, and reaffirmed in 2001.
Scope of application and characteristics
The ASTM A319 standard is applicable to three grades of gray cast iron, which are suitable for non-pressure vessel components that operate in high-temperature environments, such as grate bars, grate linkages, grate components, fuel furnace components, fire box components, ingot molds, glass molds, caustic pots, and metal melting pots. These cast irons perform well in environments with temperatures up to 1400°F (760°C), but this does not mean that all three grades of gray cast iron are suitable for the entire temperature range. Some grades are only suitable for long-term service at lower temperatures unless the stress is low.
class breakdown
Grey cast iron is divided into three grades:
Grade I: excellent resistance to thermal shock.
Grade II: Average heat shock resistance and medium to good tensile strength (tensile strength is usually greater than 30,000 psi or 207 MPa).
Grade III: Higher tensile strength than grades I and II (tensile strength may be as high as 40,000 psi or 276 MPa).
Manufacturing process and physical requirements
The ASTM A319 standard does not specify the smelting process, which is left to the discretion of the foundry. The standard also references other standards, such as ASTM A48, which detail the specifications for gray cast iron, including hardness, tensile strength, yield strength, impact toughness, and other mechanical properties testing standards
