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S38815 Stainless Steel vs. SAE-AISI A8 Steel

Both S38815 stainless steel and SAE-AISI A8 steel are iron alloys. They have 69% of their average alloy composition in common. There are 20 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 S38815 stainless steel and the bottom bar is SAE-AISI A8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Tensile Strength: Ultimate (UTS), MPa 610
700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Melting Completion (Liquidus), °C 1360
1480
Melting Onset (Solidus), °C 1310
1430
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 19
8.5
Density, g/cm3 7.5
7.9
Embodied Carbon, kg CO2/kg material 3.8
2.3
Embodied Energy, MJ/kg 54
31
Embodied Water, L/kg 140
73

Common Calculations

PREN (Pitting Resistance) 18
12
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
25 to 68
Strength to Weight: Bending, points 21
22 to 44
Thermal Shock Resistance, points 15
22 to 62

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0 to 0.030
0.5 to 0.6
Chromium (Cr), % 13 to 15
4.8 to 5.5
Copper (Cu), % 0.75 to 1.5
0 to 0.25
Iron (Fe), % 56.1 to 67
88.5 to 91.9
Manganese (Mn), % 0 to 2.0
0 to 0.5
Molybdenum (Mo), % 0.75 to 1.5
1.2 to 1.7
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
0.75 to 1.1
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0
1.0 to 1.5