*GB/T 223.1-1981 Determination of carbon content in iron,steel and alloy
*GB/T 223.4-1988 Methods for chemical analysis of iron, steel and alloy--The volumetric method for determination of manganese content by ammonium nitrate oxidation
*GB/T 223.6-1994 Methods for chemical analysis of iron,steel and alloy The neutralization titrimetric method for the determination of boron content
*GB/T 228-2002 Metallic materials--Tensile testing at ambient temperature
*GB/T 229-1994 Metallic materials-Charpy notch impact test
*GB/T 230-1991 Metallic materials－Rockwell hardness test
*GB/T 231.1-2002 Metallic materials--Brinell hardness test--Part 1:Test method
*GB/T 231.2-2002 Metallic Brinell hardness test--Part 2:Verification and calibration of hardness testers
*GB/T 231.3-2002 Metalic Brinell hardness test--Part 3:Calibration of hardness reference blocks
*GB/T 232-1999 Metallic materials--Bend test
*GB/T 1172-1999 Conversion of hardness and strength for ferrous metal
*GB/T 1979-2001 STANDARD diagrams for macrostructure and defect of structural steels
*GB/T 3077-1999 Alloy structure steels
*GB 7144-1999 Coloured cylinder mark for gases
*GB 8335-1998 Special threads for gas cylinders
*GB/T 8336-1998 Special thread gauges for gas cylinders
*GB/T 9251-1997 Method for hydraulic test of gas cylinders
*GB/T 9252-2001 Method for cycling test of gas cylinders
*GB/T 12137-2002 Method for leakage test of gas cylinders
*GB/T 12606-1999 Steel tubes--The testing method of magnetic flux leakage
*GB/T 13298-1991 Metal－Inspection method of microstructure
*GB/T 13299-1991 Steel. Determination of microstructure
*GB/T 13440-1992 Method for flattening test of seamless gas cylinders
*GB/T 5385-1994 Method of acceleration test for motorcycles and mopeds
*GB 18047-2000 Compressed natural gas as vehicle fuel
*GB 18248-2000 Seamless steel tubes for gas cylinder
*JB 4730-1994 Nondestructive testing of pressure vessels
*YB/T 5148-1993 Metal-methods for estimating the average grain size