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S82012 Stainless Steel vs. S32550 Stainless Steel

Both S82012 stainless steel and S32550 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 85% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S82012 stainless steel and the bottom bar is S32550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
21
Fatigue Strength, MPa 480
400
Poisson's Ratio 0.28
0.27
Rockwell C Hardness 27
28
Shear Modulus, GPa 78
80
Shear Strength, MPa 550
540
Tensile Strength: Ultimate (UTS), MPa 800
860
Tensile Strength: Yield (Proof), MPa 560
620

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 950
1100
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
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
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
3.8
Embodied Energy, MJ/kg 35
53
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 24
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
160
Resilience: Unit (Modulus of Resilience), kJ/m3 790
940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
31
Strength to Weight: Bending, points 25
26
Thermal Diffusivity, mm2/s 3.9
4.4
Thermal Shock Resistance, points 23
23

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.040
Chromium (Cr), % 19 to 20.5
24 to 27
Copper (Cu), % 0 to 1.0
1.5 to 2.5
Iron (Fe), % 71.3 to 77.9
57.2 to 67
Manganese (Mn), % 2.0 to 4.0
0 to 1.5
Molybdenum (Mo), % 0.1 to 0.6
2.9 to 3.9
Nickel (Ni), % 0.8 to 1.5
4.5 to 6.5
Nitrogen (N), % 0.16 to 0.26
0.1 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.0050
0 to 0.030