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SAE-AISI 1040 Steel vs. EN 1.4378 Stainless Steel

Both SAE-AISI 1040 steel and EN 1.4378 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1040 steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13 to 20
14 to 34
Fatigue Strength, MPa 220 to 340
340 to 550
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 350 to 390
510 to 680
Tensile Strength: Ultimate (UTS), MPa 570 to 640
760 to 1130
Tensile Strength: Yield (Proof), MPa 320 to 530
430 to 970

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
910
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
12
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 1.4
2.7
Embodied Energy, MJ/kg 18
39
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 96
150 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 270 to 760
470 to 2370
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20 to 23
28 to 41
Strength to Weight: Bending, points 19 to 21
24 to 31
Thermal Shock Resistance, points 18 to 20
16 to 23

Alloy Composition

Carbon (C), % 0.37 to 0.44
0 to 0.080
Chromium (Cr), % 0
17 to 19
Iron (Fe), % 98.6 to 99.03
61.2 to 69
Manganese (Mn), % 0.6 to 0.9
11.5 to 14.5
Nickel (Ni), % 0
2.3 to 3.7
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030