标准号:IS 9321-1979
发布日期:1980/3/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard covers the material requirements for alloy cast iron valve seat inserts for internal combustion engines.1.2 The various materials covered by this standard are not recommended for use for applications where the exhaust temperature exceeds 600°C.