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S31730 Stainless Steel vs. SAE-AISI 8630 Steel

Both S31730 stainless steel and SAE-AISI 8630 steel are iron alloys. They have 59% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is SAE-AISI 8630 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
160 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
12 to 24
Fatigue Strength, MPa 170
260 to 350
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 370
340 to 410
Tensile Strength: Ultimate (UTS), MPa 540
540 to 680
Tensile Strength: Yield (Proof), MPa 200
360 to 560

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 990
410
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 24
2.6
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 4.6
1.5
Embodied Energy, MJ/kg 63
20
Embodied Water, L/kg 180
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 99
340 to 840
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
19 to 24
Strength to Weight: Bending, points 18
19 to 22
Thermal Shock Resistance, points 12
18 to 23

Alloy Composition

Carbon (C), % 0 to 0.030
0.28 to 0.33
Chromium (Cr), % 17 to 19
0.4 to 0.6
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 52.4 to 61
96.8 to 97.9
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 3.0 to 4.0
0.15 to 0.25
Nickel (Ni), % 15 to 16.5
0.4 to 0.7
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040