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SAE-AISI 6150 Steel vs. S31254 Stainless Steel

Both SAE-AISI 6150 steel and S31254 stainless steel are iron alloys. They have 56% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 6150 steel and the bottom bar is S31254 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 350
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 15 to 23
40
Fatigue Strength, MPa 300 to 750
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Shear Strength, MPa 400 to 730
490
Tensile Strength: Ultimate (UTS), MPa 630 to 1200
720
Tensile Strength: Yield (Proof), MPa 420 to 1160
330

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1090
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 46
14
Thermal Expansion, µm/m-K 12 to 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
28
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.0
5.5
Embodied Energy, MJ/kg 28
74
Embodied Water, L/kg 51
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
240
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3590
270
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 43
25
Strength to Weight: Bending, points 21 to 32
22
Thermal Diffusivity, mm2/s 13
3.8
Thermal Shock Resistance, points 20 to 38
15

Alloy Composition

Carbon (C), % 0.48 to 0.53
0 to 0.020
Chromium (Cr), % 0.8 to 1.1
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 96.7 to 97.7
51.4 to 56.3
Manganese (Mn), % 0.7 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
6.0 to 6.5
Nickel (Ni), % 0
17.5 to 18.5
Nitrogen (N), % 0
0.18 to 0.22
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.010
Vanadium (V), % 0.15 to 0.3
0