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S31730 Stainless Steel vs. SAE-AISI T4 Steel

Both S31730 stainless steel and SAE-AISI T4 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 S31730 stainless steel and the bottom bar is SAE-AISI T4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 540
800 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Melting Completion (Liquidus), °C 1430
1810
Melting Onset (Solidus), °C 1390
1750
Specific Heat Capacity, J/kg-K 470
410
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 24
55
Density, g/cm3 8.0
9.4
Embodied Carbon, kg CO2/kg material 4.6
8.5
Embodied Energy, MJ/kg 63
130
Embodied Water, L/kg 180
120

Common Calculations

PREN (Pitting Resistance) 30
37
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 19
24 to 64
Strength to Weight: Bending, points 18
20 to 39
Thermal Shock Resistance, points 12
24 to 64

Alloy Composition

Carbon (C), % 0 to 0.030
0.7 to 0.8
Chromium (Cr), % 17 to 19
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 4.0 to 5.0
0 to 0.25
Iron (Fe), % 52.4 to 61
66.3 to 72.3
Manganese (Mn), % 0 to 2.0
0.1 to 0.4
Molybdenum (Mo), % 3.0 to 4.0
0.4 to 1.0
Nickel (Ni), % 15 to 16.5
0 to 0.3
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.030
Tungsten (W), % 0
17.5 to 19
Vanadium (V), % 0
0.8 to 1.2