This standard specifies the general heating technical requirements for steel free forgings. This standard applies to the pre-forging heating of cold, hot and semi-hot steel ingots (billets) of carbon steel and alloy steel.
JB/T 6052-2005 history
2005JB/T 6052-2005 General specifications for heating up of steel free forgings
1992JB/T 6052-1992 General technical requirements for steel free forging heating