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S38815 Stainless Steel vs. SAE-AISI T8 Steel

Both S38815 stainless steel and SAE-AISI T8 steel are iron alloys. They have 67% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is S38815 stainless steel and the bottom bar is SAE-AISI T8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
78
Tensile Strength: Ultimate (UTS), MPa 610
780 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Melting Completion (Liquidus), °C 1360
1730
Melting Onset (Solidus), °C 1310
1670
Specific Heat Capacity, J/kg-K 500
420
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 19
45
Density, g/cm3 7.5
9.0
Embodied Carbon, kg CO2/kg material 3.8
10
Embodied Energy, MJ/kg 54
160
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 18
30
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 22
24 to 66
Strength to Weight: Bending, points 21
21 to 41
Thermal Shock Resistance, points 15
24 to 66

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0 to 0.030
0.75 to 0.85
Chromium (Cr), % 13 to 15
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 0.75 to 1.5
0 to 0.25
Iron (Fe), % 56.1 to 67
69.3 to 75.4
Manganese (Mn), % 0 to 2.0
0.2 to 0.4
Molybdenum (Mo), % 0.75 to 1.5
0.4 to 1.0
Nickel (Ni), % 13 to 17
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 5.5 to 6.5
0.2 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0
13.3 to 14.8
Vanadium (V), % 0
1.8 to 2.4