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STR21

Favorite Datasheet
STR616 STR409
#STR21

Description

Korea KS D 3732 (2002), STR21 Specialsteel Heat - resisting steel plates and sheets and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: STR21
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel STR21 Ferrite KS Korea Heat - resisting steel plates and sheets

Chemical composition(mass fraction)(wt.%) of the STR21

C Si Mn P S Cr Ni Mo N Al
≤0.10 ≤1.50 ≤1.00 ≤0.04 ≤0.03 17.00 -21.00 ≤0.60 ≤ ≥ ≤ ≥ 2.00 -4.00

Mechanical Properties of steel grade STR21

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)
512 (≥) 777 (≥) 42 11 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical Properties of steel grade STR21

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 - -     0.43 -  
145 597 - 23.3 144   -  
325 - 14 31.2   333 431

Heat Treatment of steel grade STR21

Heat treated : 1561°C - 1218°C

Technological Curves of steel grade STR21

Relevant standard of STR21

D 3732 (2002) Heat - resisting steel plates and sheets D-3732-(2002).pdf
STR616 STR409
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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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