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Description

Korea KS D 3577 (2007), STS321TB Specialsteel Stainless steel for boiler and heat exchanger tubes and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: STS321TB
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel STS321TB Austenite KS Korea Stainless steel for boiler and heat exchanger tubes

Chemical composition(mass fraction)(wt.%) of the STS321TB

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 STS321TB

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)
865 (≥) 874 (≥) 34 43 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 112

Physical Properties of steel grade STS321TB

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
34 - -     0.33 -  
255 678 - 31.3 312   -  
226 - 21 14.2   212 113

Heat Treatment of steel grade STS321TB

Heat treated : 1558°C - 1581°C

Technological Curves of steel grade STS321TB

Cross Reference Table (Equivalent Grade) of STS321TB

Grade Standard Country Application
STS321
STS321

Relevant standard of STS321TB

D 3577 (2007) Stainless steel for boiler and heat exchanger tubes D-3577-(2007).pdf

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