1. Material: 12Cr1MoVG, corresponding to national standard GB5310, material 12Cr1MoVG, use: high-pressure boiler seamless pipe

2. Material: 15CrMoG, corresponding to the national standard GB5310, the material is 15CrMoG, the use is high-pressure boiler pipe, the corresponding American standard is A213/A335, the material is T12/P12, the use is boiler seamless steel pipe, corresponding to the German standard DIN17175, the material is 13CrMo44, the use is resistant Hot steel seamless steel pipe. The corresponding European standard is EN10216-2, the material is 13CrMo4-5, use: pressure pipe, HS code is 7304599090.

3. Material: 1Cr5Mo, corresponding to the national standard is GB9948 or GB6479, material 1Cr5Mo, use, seamless steel pipe for high-pressure boilers, corresponding to the American standard A213/A335, material: T5/P5, use, seamless steel pipe for boilers, corresponding to the German standard EN10216-2, material X11CrMo5, use, pressure-bearing pipe, HS code is 7304599090.