A 959 Type 631 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A 959 Type 631

SAE A 959 Type 631

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This page is mainly introduced the A 959 Type 631 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A 959 Type 631,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
  • Steel Garde:A 959 Type 631
  • Type:Stainless Steels
  • Country:USA
  • Standard:SAE
  • Standard Number:
    ITEM Standard Number Descriptions
    1 A 959 (2011) Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
  • Metallographic Structure:Precipitation-Hardening
  • Application:Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.09
Mn   1.00
Si   1.00
P   0.04
S   0.03
Cr 16.00  18.00
Ni 6.50  7.75
Mo  
Al 0.75  1.50

Mechanical Properties

Tensile strength 464~393 σb/MPa
Yield Strength 257 σ 0.2 ≥/MPa
Elongation 82 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 840~587 -
HRC 30 -

Physical Properties

Thermal expansion 07-82 e-6/K
Thermal conductivity 89-56 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 9708-6109 째C
Density 7760-9196 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)
A 959 Type 631 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