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EN 1.7378 Steel vs. S40975 Stainless Steel

Both EN 1.7378 steel and S40975 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 32 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 1.7378 steel and the bottom bar is S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
22
Fatigue Strength, MPa 330
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Shear Strength, MPa 430
290
Tensile Strength: Ultimate (UTS), MPa 700
460
Tensile Strength: Yield (Proof), MPa 490
310

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 460
710
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
26
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.3
2.0
Embodied Energy, MJ/kg 33
28
Embodied Water, L/kg 61
95

Common Calculations

PREN (Pitting Resistance) 5.8
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
93
Resilience: Unit (Modulus of Resilience), kJ/m3 630
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25
17
Strength to Weight: Bending, points 22
17
Thermal Diffusivity, mm2/s 10
7.0
Thermal Shock Resistance, points 20
17

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0.0015 to 0.0070
0
Carbon (C), % 0.050 to 0.1
0 to 0.030
Chromium (Cr), % 2.2 to 2.6
10.5 to 11.7
Iron (Fe), % 94.6 to 96.1
84.4 to 89
Manganese (Mn), % 0.3 to 0.7
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
0.5 to 1.0
Nitrogen (N), % 0 to 0.010
0 to 0.030
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.15 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.050 to 0.1
0 to 0.75
Vanadium (V), % 0.2 to 0.3
0