15CrMoG high pressure alloy tube

15CrMoG high-pressure alloy tube is a steel widely used in the electric power industry. It has high thermal strength when used at 500℃-550℃. When the operating temperature is higher than 550 °C, its thermal strength performance is significantly reduced.

15CrMoG chemical composition:

C	Si	Mn	P	S	Cr	Mo
0.12～0.18	0.15～0.40	0.40～0.70	≤0.025	≤0.025	0.80～1.20	0.45～0.60

Alloy tube size and tolerance

Deviation level	Standardized outer diameter tolerance
D1	±1.5%，minimum±0.75 mm
D2	±1.0%。minimum±0.50 mm
D3	±0.75%．minimum±0.30 mm
D4	±0.50%。minimum±0.10 mm

The same type of steel in foreign countries includes 15XM from the former Soviet Union, American grades T12, P12, Japanese grades STBA22, STPA22 and German grades 13CrMo44, etc.

Usually 15CrMoG steel is mainly used for high and medium pressure pipes and steam guide pipes with steam parameters of 510 °C, and heat exchanger tubes with a tube wall temperature of 550 °C.

---