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EN 1.4122 Stainless Steel vs. EN 1.7378 Steel

Both EN 1.4122 stainless steel and EN 1.7378 steel are iron alloys. They have 85% 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 1.4122 stainless steel and the bottom bar is EN 1.7378 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14
17
Fatigue Strength, MPa 260 to 360
330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 480 to 520
430
Tensile Strength: Ultimate (UTS), MPa 790 to 850
700
Tensile Strength: Yield (Proof), MPa 450 to 630
490

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 870
460
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
4.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
2.3
Embodied Energy, MJ/kg 33
33
Embodied Water, L/kg 120
61

Common Calculations

PREN (Pitting Resistance) 20
5.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 1000
630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 31
25
Strength to Weight: Bending, points 25 to 26
22
Thermal Diffusivity, mm2/s 4.0
10
Thermal Shock Resistance, points 28 to 30
20

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0015 to 0.0070
Carbon (C), % 0.33 to 0.45
0.050 to 0.1
Chromium (Cr), % 15.5 to 17.5
2.2 to 2.6
Iron (Fe), % 77.2 to 83.4
94.6 to 96.1
Manganese (Mn), % 0 to 1.5
0.3 to 0.7
Molybdenum (Mo), % 0.8 to 1.3
0.9 to 1.1
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0.15 to 0.45
Sulfur (S), % 0 to 0.015
0 to 0.010
Titanium (Ti), % 0
0.050 to 0.1
Vanadium (V), % 0
0.2 to 0.3