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EN 1.4122 Stainless Steel vs. EN 1.6958 Steel

Both EN 1.4122 stainless steel and EN 1.6958 steel are iron alloys. They have 84% 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 1.6958 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
700
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 480 to 520
700
Tensile Strength: Ultimate (UTS), MPa 790 to 850
1140
Tensile Strength: Yield (Proof), MPa 450 to 630
1070

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 870
450
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
47
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
5.0
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.4
2.0
Embodied Energy, MJ/kg 33
27
Embodied Water, L/kg 120
60

Common Calculations

PREN (Pitting Resistance) 20
2.9
Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 110
180
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 1000
3050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 31
40
Strength to Weight: Bending, points 25 to 26
31
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 28 to 30
39

Alloy Composition

Aluminum (Al), % 0
0.0050 to 0.050
Carbon (C), % 0.33 to 0.45
0.25 to 0.3
Chromium (Cr), % 15.5 to 17.5
1.2 to 1.7
Iron (Fe), % 77.2 to 83.4
92.6 to 94.5
Manganese (Mn), % 0 to 1.5
0.2 to 0.5
Molybdenum (Mo), % 0.8 to 1.3
0.35 to 0.55
Nickel (Ni), % 0 to 1.0
3.3 to 3.8
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0.15 to 0.3
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0
0 to 0.12