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SAE-AISI T4 Steel vs. S32950 Stainless Steel

Both SAE-AISI T4 steel and S32950 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 22 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 T4 steel and the bottom bar is S32950 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
780

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1810
1430
Melting Onset (Solidus), °C 1750
1390
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 21
16
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 55
17
Density, g/cm3 9.4
7.7
Embodied Carbon, kg CO2/kg material 8.5
3.4
Embodied Energy, MJ/kg 130
47
Embodied Water, L/kg 120
180

Common Calculations

PREN (Pitting Resistance) 37
37
Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 24 to 64
28
Strength to Weight: Bending, points 20 to 39
24
Thermal Diffusivity, mm2/s 5.4
4.3
Thermal Shock Resistance, points 24 to 64
21

Alloy Composition

Carbon (C), % 0.7 to 0.8
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
26 to 29
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 66.3 to 72.3
60.3 to 69.4
Manganese (Mn), % 0.1 to 0.4
0 to 2.0
Molybdenum (Mo), % 0.4 to 1.0
1.0 to 2.5
Nickel (Ni), % 0 to 0.3
3.5 to 5.2
Nitrogen (N), % 0
0.15 to 0.35
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.2 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 0.8 to 1.2
0