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S82012 Stainless Steel vs. S82031 Stainless Steel

Both S82012 stainless steel and S82031 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is S82012 stainless steel and the bottom bar is S82031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
39
Fatigue Strength, MPa 480
490
Poisson's Ratio 0.28
0.28
Rockwell C Hardness 27
27
Shear Modulus, GPa 78
78
Shear Strength, MPa 550
540
Tensile Strength: Ultimate (UTS), MPa 800
780
Tensile Strength: Yield (Proof), MPa 560
570

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 420
430
Maximum Temperature: Mechanical, °C 950
980
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.4
2.8
Embodied Energy, MJ/kg 35
39
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 24
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
280
Resilience: Unit (Modulus of Resilience), kJ/m3 790
820
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
28
Strength to Weight: Bending, points 25
24
Thermal Diffusivity, mm2/s 3.9
3.9
Thermal Shock Resistance, points 23
22

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.050
Chromium (Cr), % 19 to 20.5
19 to 22
Copper (Cu), % 0 to 1.0
0 to 1.0
Iron (Fe), % 71.3 to 77.9
68 to 78.3
Manganese (Mn), % 2.0 to 4.0
0 to 2.5
Molybdenum (Mo), % 0.1 to 0.6
0.6 to 1.4
Nickel (Ni), % 0.8 to 1.5
2.0 to 4.0
Nitrogen (N), % 0.16 to 0.26
0.14 to 0.24
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 0.8
Sulfur (S), % 0 to 0.0050
0 to 0.0050