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S38815 Stainless Steel vs. SAE-AISI A9 Steel

Both S38815 stainless steel and SAE-AISI A9 steel are iron alloys. They have 71% 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 A9 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
770 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 370
280
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1310
1410
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 19
7.0
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.8
4.7
Embodied Energy, MJ/kg 54
70
Embodied Water, L/kg 140
82

Common Calculations

PREN (Pitting Resistance) 18
10
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
28 to 73
Strength to Weight: Bending, points 21
24 to 46
Thermal Shock Resistance, points 15
25 to 66

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0 to 0.030
0.45 to 0.55
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
87 to 90.5
Manganese (Mn), % 0 to 2.0
0 to 0.5
Molybdenum (Mo), % 0.75 to 1.5
1.3 to 1.8
Nickel (Ni), % 13 to 17
1.3 to 1.8
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 5.5 to 6.5
1.0 to 1.2
Sulfur (S), % 0 to 0.020
0 to 0.030
Vanadium (V), % 0
0.8 to 1.4