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Description

China GB GB/T 11251 (2009), GB/T 17396 (2009), GB/T 3077 (1999), GB/T 3078 (2008), GB/T 8162 (2008), 27SiMn Specialsteel Structural and constructional steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 27SiMn
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 27SiMn GB China Structural and constructional steels

Chemical composition(mass fraction)(wt.%) of the 27SiMn

C Si Mn P S Cu Cr Ni Mo
0.24 -0.32 1.10 -1.40 1.10 -1.40 ≤0.035 ≤0.035 ≤0.30 ≤0.30 ≤0.30 ≤0.15

Mechanical Properties of steel grade 27SiMn

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
497 (≥) 951 (≥) 32 13 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade 27SiMn

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
23 - -     0.32 -  
961 531 - 13.3 441   -  
668 - 13 22.2   111 231

Heat Treatment of steel grade 27SiMn

Heat treated : 1538°C - 1458°C

Technological Curves of steel grade 27SiMn

Relevant standard of 27SiMn

GB/T 11251 (2009) Hot-rolled alloy structural steel plates GB-T-11251-(2009).pdf
GB/T 17396 (2009) Hot-rolled seamless steel tubes for hydraulic pillar service GB-T-17396-(2009).pdf
GB/T 3077 (1999) Alloy structure steels GB-T-3077-(1999).pdf
GB/T 3078 (2008) Quality structural steel cold drawn bars GB-T-3078-(2008).pdf
GB/T 8162 (2008) Seamless steel tubes for structural purposes GB-T-8162-(2008).pdf

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