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SAE-AISI T4 Steel vs. S30815 Stainless Steel

Both SAE-AISI T4 steel and S30815 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T4 steel and the bottom bar is S30815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
680

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Melting Completion (Liquidus), °C 1810
1400
Melting Onset (Solidus), °C 1750
1360
Specific Heat Capacity, J/kg-K 410
490
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 55
17
Density, g/cm3 9.4
7.7
Embodied Carbon, kg CO2/kg material 8.5
3.3
Embodied Energy, MJ/kg 130
47
Embodied Water, L/kg 120
160

Common Calculations

PREN (Pitting Resistance) 37
24
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 24 to 64
25
Strength to Weight: Bending, points 20 to 39
22
Thermal Diffusivity, mm2/s 5.4
4.0
Thermal Shock Resistance, points 24 to 64
15

Alloy Composition

Carbon (C), % 0.7 to 0.8
0.050 to 0.1
Cerium (Ce), % 0
0.030 to 0.080
Chromium (Cr), % 3.8 to 4.5
20 to 22
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 66.3 to 72.3
62.8 to 68.4
Manganese (Mn), % 0.1 to 0.4
0 to 0.8
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 0 to 0.3
10 to 12
Nitrogen (N), % 0
0.14 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.4
1.4 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 0.8 to 1.2
0