STR3 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STR3

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KS STR3

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This page is mainly introduced the STR3 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STR3,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Heat - resisting steel bars

Cross Reference Table(Equivalent Materials):

Material Standard Country
STR31 KS Korea
STR310 KS Korea
STR35 KS Korea
STR36 KS Korea
STR37 KS Korea
STR38 KS Korea
STR309 KS Korea
STR330 KS Korea

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.35  0.45
Si 1.80  2.50
Mn   0.60
P   0.03
S   0.03
Cr 10.00  12.00
Ni   0.60
Mo 0.70  1.30
N  
Cu   0.30

Mechanical Properties

Tensile strength 795~883 σb/MPa
Yield Strength 780 σ 0.2 ≥/MPa
Elongation 52 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 284~628 -
HRC 30 -

Physical Properties

Thermal expansion 40-82 e-6/K
Thermal conductivity 51-95 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 0253-3908 째C
Density 3959-6065 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m
     

Heat Treatment Regime

Annealing

Quenching

Tempering

Normalizing

Q & T

Size Availability

Steel Grade Specification Processing range(mm)
STR3 Stainless Steels Round Bar and Hollow Bar Φ1 to Φ2000
Square and Flat Steel Φ10 to Φ100
Plate and Sheet 0.08-800(Thickness)*10-1500(Width)*Length
Tube or Pipe OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
Coil and Strip Steel THK:0.1mm Width:1500mm
Forged Ring/Cylindrical/Disk

Technical specification/standard for download

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