Mechanical Properties and Chemical Composition of 27siMn Seamless Steel Tube
Steel group
sequence
number
Unified number
Word code
Grade
Chemical composition (mass fraction) (%)
C
Si
Mn
Cr
Mo
Ni
B
V
other
siMn
8
A1O272
27siMn
O. 24～O. 32
1.10 to 1.40
1.10 to 1.40
Steel group
sequence
number
Brand
Specimen
blank
size
/mm
Heat treatment
Mechanical properties
Annealed steel or high temperature tempered supply state Brinell hardness HBSl00/3000
≤
Quenching
Backfire
Tensile strength ób/MPa
Yield point
Ós/MPa
Elongation after fracture δ5 (%)
Section shrinkage ¢ (%)
Shock absorption work Aku2/J
Heating temperature/°C
Coolant
heating
temperature
/°C
Coolant
First quench
Second quench
≥
SiMn
27SiMn
25
920
water
450
Water, oil
980
835
12
40
39
217
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