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EN 1.4122 Stainless Steel vs. EN 1.7039 Steel

Both EN 1.4122 stainless steel and EN 1.7039 steel are iron alloys. They have 83% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 1.7039 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 790 to 850
530 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 870
420
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
46
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.3
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
1.4
Embodied Energy, MJ/kg 33
19
Embodied Water, L/kg 120
51

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 31
19 to 65
Strength to Weight: Bending, points 25 to 26
19 to 43
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 28 to 30
16 to 54

Alloy Composition

Carbon (C), % 0.33 to 0.45
0.38 to 0.45
Chromium (Cr), % 15.5 to 17.5
0.9 to 1.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 77.2 to 83.4
96.8 to 98.1
Manganese (Mn), % 0 to 1.5
0.6 to 0.9
Molybdenum (Mo), % 0.8 to 1.3
0
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 0.3
Sulfur (S), % 0 to 0.015
0.020 to 0.040