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SAE-AISI T15 Steel vs. S31730 Stainless Steel

Both SAE-AISI T15 steel and S31730 stainless steel are iron alloys. They have 62% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T15 steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 830 to 2240
540

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1690
1430
Melting Onset (Solidus), °C 1640
1390
Specific Heat Capacity, J/kg-K 430
470
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 43
24
Density, g/cm3 8.7
8.0
Embodied Carbon, kg CO2/kg material 16
4.6
Embodied Energy, MJ/kg 250
63
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 27
30
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 26 to 71
19
Strength to Weight: Bending, points 22 to 43
18
Thermal Shock Resistance, points 26 to 70
12

Alloy Composition

Carbon (C), % 1.5 to 1.6
0 to 0.030
Chromium (Cr), % 3.8 to 5.0
17 to 19
Cobalt (Co), % 4.8 to 5.3
0
Copper (Cu), % 0 to 0.25
4.0 to 5.0
Iron (Fe), % 67.5 to 73.5
52.4 to 61
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 0 to 1.0
3.0 to 4.0
Nickel (Ni), % 0 to 0.3
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 11.8 to 13
0
Vanadium (V), % 4.5 to 5.3
0