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SAE-AISI 6150 Steel vs. S31730 Stainless Steel

Both SAE-AISI 6150 steel and S31730 stainless 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 SAE-AISI 6150 steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 350
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 15 to 23
40
Fatigue Strength, MPa 300 to 750
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 400 to 730
370
Tensile Strength: Ultimate (UTS), MPa 630 to 1200
540
Tensile Strength: Yield (Proof), MPa 420 to 1160
200

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
990
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 12 to 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.0
4.6
Embodied Energy, MJ/kg 28
63
Embodied Water, L/kg 51
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
170
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3590
99
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 43
19
Strength to Weight: Bending, points 21 to 32
18
Thermal Shock Resistance, points 20 to 38
12

Alloy Composition

Carbon (C), % 0.48 to 0.53
0 to 0.030
Chromium (Cr), % 0.8 to 1.1
17 to 19
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 96.7 to 97.7
52.4 to 61
Manganese (Mn), % 0.7 to 0.9
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.010
Vanadium (V), % 0.15 to 0.3
0