27SiMn

27SiMn Structural Steel to GB/T 11251 (2009)

27SiMn - Specification & Application

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

Structural and constructional steels

Chemical composition(wt.%) of 27SiMn grade: to GB/T 11251 (2009)

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.24 0.32
Si 1.10 1.40
Mn 1.10 1.40
P - 0.035
S - 0.035
Cu - 0.30
Cr - 0.30
Ni - 0.30
Mo - 0.15

27SiMn - Detail

27SiMn

Mechanical properties of grade 27SiMn GB/T 11251 (2009)

Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
355 (≥) 529 (≥) 12 41 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 123

Physical properties of grade 27SiMn GB/T 11251 (2009)

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
341 (≥) 795 (≥) 12 22 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 332
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
123 272 143

Equivalent Grade

1 27SiMn 2 27SiMn

Equivalent Products

Product shapes we supply:

We can customize the production of 27SiMn grade, contact us for the best solution.
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