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S31730 Stainless Steel vs. AWS E33-31

Both S31730 stainless steel and AWS E33-31 are iron alloys. They have 67% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is AWS E33-31.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 40
29
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
81
Tensile Strength: Ultimate (UTS), MPa 540
810

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1430
1380
Melting Onset (Solidus), °C 1390
1330
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Base Metal Price, % relative 24
36
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 4.6
6.0
Embodied Energy, MJ/kg 63
86
Embodied Water, L/kg 180
260

Common Calculations

PREN (Pitting Resistance) 30
44
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
28
Strength to Weight: Bending, points 18
24
Thermal Shock Resistance, points 12
19

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17 to 19
31 to 35
Copper (Cu), % 4.0 to 5.0
0.4 to 0.8
Iron (Fe), % 52.4 to 61
24.7 to 34.8
Manganese (Mn), % 0 to 2.0
2.5 to 4.0
Molybdenum (Mo), % 3.0 to 4.0
1.0 to 2.0
Nickel (Ni), % 15 to 16.5
30 to 32
Nitrogen (N), % 0 to 0.045
0.3 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.9
Sulfur (S), % 0 to 0.010
0 to 0.010