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S82031 Stainless Steel vs. S31803 Stainless Steel

Both S82031 stainless steel and S31803 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 94% 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 S82031 stainless steel and the bottom bar is S31803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
29
Fatigue Strength, MPa 490
370
Poisson's Ratio 0.28
0.27
Rockwell C Hardness 27
27
Shear Modulus, GPa 78
80
Shear Strength, MPa 540
460
Tensile Strength: Ultimate (UTS), MPa 780
710
Tensile Strength: Yield (Proof), MPa 570
500

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 430
430
Maximum Temperature: Mechanical, °C 980
1060
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1400
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 13
17
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
3.6
Embodied Energy, MJ/kg 39
49
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 27
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
180
Resilience: Unit (Modulus of Resilience), kJ/m3 820
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
25
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 3.9
4.3
Thermal Shock Resistance, points 22
20

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.030
Chromium (Cr), % 19 to 22
21 to 23
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 68 to 78.3
63.7 to 71.9
Manganese (Mn), % 0 to 2.5
0 to 2.0
Molybdenum (Mo), % 0.6 to 1.4
2.5 to 3.5
Nickel (Ni), % 2.0 to 4.0
4.5 to 6.5
Nitrogen (N), % 0.14 to 0.24
0.080 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.0050
0 to 0.020