27SiMn, alloy structural steel. Unified digital code: A10272

Standard: GB / T 3077-1999

[Main features]

This steel is superior to 30Mn2 steel, high hardenability, quenching in water, the critical diameter of 8 ~ 22mm, can be good cutting, plastic deformation and cold welding of medium; addition toughness of steel during heat treatment to reduce the small, but there is a very high strength and wear resistance, especially when there are high water quenching toughness; point, but the sensitivity of this great dialogue of steel, heat treatment has tendency to temper brittleness, and thermal sensitivity.

[Application Examples]

This steel is mainly used in the quenched state, required for the manufacture of high toughness and wear resistance of hot-stamping; also supply hot-rolled or normalized state in use, such as crawler tractors sales and so on.

27simn and the application of ordinary steel

1, fluid seamless steel pipes: GB8163-2008

2, boiler seamless steel pipe: GB3087-2008

3, high-pressure boiler seamless pipe: GB5310-2008 (ST45.8-ⅲ type)

4, chemical fertilizer equipment, high pressure seamless steel pipe: GB6479-2000

5, geological drilling seamless: YB235-70

6, oil drilling seamless: YB528-65

7, petroleum cracking seamless steel pipes: GB9948-88

8, oil drill collar dedicated seamless: YB691-70

9, automobile axle seamless steel pipes: GB3088-1999

10, the ship seamless steel pipes: GB5312-1999

     11, cold-drawn cold-rolled precision seamless steel pipe: GB3639-1999