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SAE-AISI O7 Steel vs. EN 1.4378 Stainless Steel

Both SAE-AISI O7 steel and EN 1.4378 stainless 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 (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O7 steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 680 to 2110
760 to 1130

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1480
1390
Melting Onset (Solidus), °C 1430
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
12
Density, g/cm3 7.9
7.6
Embodied Carbon, kg CO2/kg material 2.3
2.7
Embodied Energy, MJ/kg 33
39
Embodied Water, L/kg 52
150

Common Calculations

PREN (Pitting Resistance) 3.6
23
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 74
28 to 41
Strength to Weight: Bending, points 22 to 46
24 to 31
Thermal Shock Resistance, points 23 to 70
16 to 23

Alloy Composition

Carbon (C), % 1.1 to 1.3
0 to 0.080
Chromium (Cr), % 0.35 to 0.85
17 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92.9 to 97.6
61.2 to 69
Manganese (Mn), % 0 to 1.0
11.5 to 14.5
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 0.3
2.3 to 3.7
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.0 to 2.0
0
Vanadium (V), % 0 to 0.4
0