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AISI 431 Stainless Steel vs. S82012 Stainless Steel

Both AISI 431 stainless steel and S82012 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is S82012 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 15 to 17
40
Fatigue Strength, MPa 430 to 610
480
Poisson's Ratio 0.28
0.28
Rockwell C Hardness 26
27
Shear Modulus, GPa 77
78
Shear Strength, MPa 550 to 840
550
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
800
Tensile Strength: Yield (Proof), MPa 710 to 1040
560

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 400
420
Maximum Temperature: Mechanical, °C 850
950
Melting Completion (Liquidus), °C 1510
1430
Melting Onset (Solidus), °C 1450
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
11
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.2
2.4
Embodied Energy, MJ/kg 31
35
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 16
24
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
290
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
790
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 50
29
Strength to Weight: Bending, points 27 to 36
25
Thermal Diffusivity, mm2/s 7.0
3.9
Thermal Shock Resistance, points 28 to 43
23

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.050
Chromium (Cr), % 15 to 17
19 to 20.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 78.2 to 83.8
71.3 to 77.9
Manganese (Mn), % 0 to 1.0
2.0 to 4.0
Molybdenum (Mo), % 0
0.1 to 0.6
Nickel (Ni), % 1.3 to 2.5
0.8 to 1.5
Nitrogen (N), % 0
0.16 to 0.26
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.0050