XM-31 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of XM-31

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UNS XM-31

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This page is mainly introduced the XM-31 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of XM-31,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
S21400
  • Steel Garde:XM-31
  • Type:Stainless Steels
  • Country:USA
  • Standard:UNS
  • Standard Number:
    ITEM Standard Number Descriptions
    1 SAE J 405 (1998) Chemical compositions of SAE wrought stainless steels
  • Metallographic Structure:Austenite
  • Application:Chemical compositions of SAE wrought stainless steels

Cross Reference Table(Equivalent Materials):

Material Standard Country
S21400 AISI USA
A 240 S21400 SAE USA
A 580 S21400 SAE USA
S21400 AISI USA
SA-240 S21400 AMS USA

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.12
Si 0.30  1.00
Mn 14.5  16.0
P   0.045
S   0.03
Cr 17.0  18.5
Ni   1.00
N   0.35

Mechanical Properties

Tensile strength 005~918 σb/MPa
Yield Strength 619 σ 0.2 ≥/MPa
Elongation 10 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 234~597 -
HRC 30 -

Physical Properties

Thermal expansion 45-76 e-6/K
Thermal conductivity 66-86 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 8620-9866 째C
Density 8918-1039 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)
XM-31 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