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EN 1.4615 Stainless Steel vs. SAE-AISI 8740 Steel

Both EN 1.4615 stainless steel and SAE-AISI 8740 steel are iron alloys. They have 70% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4615 stainless steel and the bottom bar is SAE-AISI 8740 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
170 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 50
11 to 23
Fatigue Strength, MPa 190
270 to 350
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 360
370 to 400
Tensile Strength: Ultimate (UTS), MPa 500
580 to 670
Tensile Strength: Yield (Proof), MPa 200
380 to 570

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 840
410
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.5
Embodied Energy, MJ/kg 40
20
Embodied Water, L/kg 140
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 99
390 to 850
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
20 to 24
Strength to Weight: Bending, points 18
20 to 22
Thermal Diffusivity, mm2/s 4.1
10
Thermal Shock Resistance, points 11
17 to 20

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 14 to 16
0.4 to 0.6
Copper (Cu), % 2.0 to 4.0
0
Iron (Fe), % 63.1 to 72.5
96.5 to 97.7
Manganese (Mn), % 7.0 to 9.0
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.8
0.2 to 0.3
Nickel (Ni), % 4.5 to 6.0
0.4 to 0.7
Nitrogen (N), % 0.020 to 0.060
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040