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EN 1.7321 Steel vs. S35125 Stainless Steel

Both EN 1.7321 steel and S35125 stainless steel are iron alloys. They have 43% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.7321 steel and the bottom bar is S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 490 to 1460
540

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 410
1100
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
36
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 1.5
6.4
Embodied Energy, MJ/kg 20
89
Embodied Water, L/kg 50
210

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 52
19
Strength to Weight: Bending, points 18 to 36
18
Thermal Diffusivity, mm2/s 12
3.1
Thermal Shock Resistance, points 14 to 43
12

Alloy Composition

Carbon (C), % 0.17 to 0.23
0 to 0.1
Chromium (Cr), % 0.3 to 0.6
20 to 23
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 97.1 to 98.4
36.2 to 45.8
Manganese (Mn), % 0.7 to 1.0
1.0 to 1.5
Molybdenum (Mo), % 0.4 to 0.5
2.0 to 3.0
Nickel (Ni), % 0
31 to 35
Niobium (Nb), % 0
0.25 to 0.6
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.3
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.015