AISI 312 (S31200) Stainless Steel
Duplex Stainless Steels
Property Overview
Density7.7g/cm³
Elastic Modulus200GPa
Tensile Strength780MPa
Yield Strength510MPa
Brinell Hardness250HB
Maximum Service Temperature1100°C
Chemical Composition
C
0 to 0.030%
CR
24 to 26%
NI
5.5 to 6.5%
MO
1.2 to 2.0%
MN
0 to 2.0%
SI
0 to 1.0%
N
0.14 to 0.2%
P
0 to 0.045%
S
0 to 0.030%
FE
62.2 to 69.2%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
28 %
Fatigue Strength
370 MPa
Poisson's Ratio
0.27
Reduction in Area
56 %
Shear Modulus
80 GPa
Shear Strength
510 MPa
Tensile Strength: Ultimate (UTS)
780 MPa
Tensile Strength: Yield (Proof)
510 MPa
Hardness
Brinell Hardness
250
Rockwell C Hardness
27
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
450 °C
Maximum Temperature: Mechanical
1100 °C
Melting Completion (Liquidus)
1430 °C
Melting Onset (Solidus)
1390 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
16 W/m-K
Thermal Diffusivity
4.3 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
21 points
Electrical
Electrical Conductivity: Equal Volume
2.1 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Calculated
PREN (Pitting Resistance)
33
Resilience: Ultimate (Unit Rupture Work)
190 MJ/m 3
Resilience: Unit (Modulus of Resilience)
640 kJ/m 3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
28 points
Strength to Weight: Bending
24 points
Environmental
Base Metal Price
17 % relative
Embodied Carbon
3.4 kg CO 2 /kg material
Embodied Energy
48 MJ/kg
Embodied Energy
48 MJ/kg 20 x 10 3 BTU/lb
Embodied Water
170 L/kg
Embodied Water
170 L/kg 20 gal/lb
Registered Designations & Aliases
312AISI 312AISI 312 (S31200) Stainless SteelS31200
Standards
ASTM A182 ASTM A182: Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A240 ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications