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STKM20A

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STKM19C SNCM220
#STKM20A

Description

China CNS STKM20A China Taiwan Structural steel and STKM20A Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: STKM20A
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel STKM20A CNS China China Taiwan Structural steel
STKM15C
STKM16A
STKM16C
STKM17A
STKM17C
STKM18A
STKM18B
STKM18C
STKM19A
STKM19C

Chemical composition(mass fraction)(wt.%) of the STKM20A

C(％) Si(％) Mn(％) P(％) S(％)
Max 0.25 0.55 Max 1.60 0.04 0.04

Mechanical Properties of steel grade STKM20A

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)
559 (≥) 711 (≥) 14 33 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade STKM20A

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
13 - -     0.22 -  
842 678 - 42.3 144   -  
884 - 22 31.2   412 412

Heat Treatment of steel grade STKM20A

Heat treated : 1924°C - 1878°C

Technological Curves of steel grade STKM20A

Cross Reference Table (Equivalent Grade) of STKM20A

Grade Standard Country Application
STKM20A CNS China China Taiwan Structural steel
STKM19C SNCM220
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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