SUS 321 HTF chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS 321 HTF

JIS SUS 321 HTF

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This page is mainly introduced the SUS 321 HTF chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS 321 HTF,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Steel tubes for fired heater

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.08
Si   1.00
Mn   2.00
P   0.045
S   0.03
Cr 17.00  19.00
Ni 9.00  13.00
Mo  
N  
Ti 5×C% 

Mechanical Properties

Tensile strength 076~490 σb/MPa
Yield Strength 657 σ 0.2 ≥/MPa
Elongation 63 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 501~593 -
HRC 30 -

Physical Properties

Thermal expansion 99-37 e-6/K
Thermal conductivity 07-24 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 0554-1502 째C
Density 5977-8541 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)
SUS 321 HTF 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