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S38815 Stainless Steel vs. SAE-AISI 8740 Steel

Both S38815 stainless steel and SAE-AISI 8740 steel are iron alloys. They have 64% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 8740 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 34
11 to 23
Fatigue Strength, MPa 230
270 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 410
370 to 400
Tensile Strength: Ultimate (UTS), MPa 610
580 to 670
Tensile Strength: Yield (Proof), MPa 290
380 to 570

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Maximum Temperature: Mechanical, °C 860
410
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1310
1420
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.6
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.8
1.5
Embodied Energy, MJ/kg 54
20
Embodied Water, L/kg 140
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 220
390 to 850
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
20 to 24
Strength to Weight: Bending, points 21
20 to 22
Thermal Shock Resistance, points 15
17 to 20

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 13 to 15
0.4 to 0.6
Copper (Cu), % 0.75 to 1.5
0
Iron (Fe), % 56.1 to 67
96.5 to 97.7
Manganese (Mn), % 0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 0.75 to 1.5
0.2 to 0.3
Nickel (Ni), % 13 to 17
0.4 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 5.5 to 6.5
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.040