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EN 1.4122 Stainless Steel vs. EN 1.7390 Steel

Both EN 1.4122 stainless steel and EN 1.7390 steel are iron alloys. They have 87% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 1.7390 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14
16
Fatigue Strength, MPa 260 to 360
310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 480 to 520
440
Tensile Strength: Ultimate (UTS), MPa 790 to 850
710
Tensile Strength: Yield (Proof), MPa 450 to 630
480

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 870
510
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
4.3
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
1.7
Embodied Energy, MJ/kg 33
23
Embodied Water, L/kg 120
69

Common Calculations

PREN (Pitting Resistance) 20
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 1000
600
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 31
25
Strength to Weight: Bending, points 25 to 26
23
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 28 to 30
20

Alloy Composition

Carbon (C), % 0.33 to 0.45
0 to 0.18
Chromium (Cr), % 15.5 to 17.5
4.0 to 6.0
Iron (Fe), % 77.2 to 83.4
91.9 to 95.3
Manganese (Mn), % 0 to 1.5
0.3 to 0.8
Molybdenum (Mo), % 0.8 to 1.3
0.45 to 0.65
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.015