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See Chinese contents: JB/T 5000.8-2007 JB/T 5000.8-2007: Heavy mechanical general techniques and standards. Part 8: Forging
This Part of the JB/T 5000 specifies the ultrasonic, magnetic-powder and penetration testing methods and quality grades of forged steel. This Part applies to non-destructive testing of forged steel for heavy machinery. Non-destructive testing methods as specified in this Part may involve hazardous materials, operations and equipment, so the non-destructive testing personnel shall comply with relevant safety and health regulations.
