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STS321HTF

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STS321HTB STS321TB
#STS321

Description

Korea KS D 3587 (1991), STS321HTF Specialsteel Steel tubes for fired heater and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: STS321HTF
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel STS321HTF Austenite KS Korea Steel tubes for fired heater

Chemical composition(mass fraction)(wt.%) of the STS321HTF

C Si Mn P S Cr Ni Mo N Ti
≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 17.00 -19.00 9.00 -13.00 ≤ ≥ ≤ ≥ 5×C％ - ≥

Mechanical Properties of steel grade STS321HTF

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)
486 (≥) 829 (≥) 32 44 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical Properties of steel grade STS321HTF

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
21 - -     0.44 -  
156 261 - 13.3 312   -  
937 - 22 12.2   132 132

Heat Treatment of steel grade STS321HTF

Heat treated : 1687°C - 1145°C

Technological Curves of steel grade STS321HTF

Cross Reference Table (Equivalent Grade) of STS321HTF

Grade Standard Country Application
STS321
STS321

Relevant standard of STS321HTF

D 3587 (1991) Steel tubes for fired heater D-3587-(1991).pdf
STS321HTB STS321TB
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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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