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EN 1.4020 Stainless Steel vs. EN 1.7321 Steel

Both EN 1.4020 stainless steel and EN 1.7321 steel are iron alloys. They have 69% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is EN 1.4020 stainless steel and the bottom bar is EN 1.7321 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 340
150 to 170
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 770 to 1130
490 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 890
410
Melting Completion (Liquidus), °C 1390
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.5
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 2.5
1.5
Embodied Energy, MJ/kg 37
20
Embodied Water, L/kg 150
50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 41
17 to 52
Strength to Weight: Bending, points 25 to 32
18 to 36
Thermal Shock Resistance, points 16 to 23
14 to 43

Alloy Composition

Carbon (C), % 0 to 0.15
0.17 to 0.23
Chromium (Cr), % 16.5 to 19
0.3 to 0.6
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 62.8 to 71.8
97.1 to 98.4
Manganese (Mn), % 11 to 14
0.7 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.5
Nickel (Ni), % 0.5 to 2.5
0
Nitrogen (N), % 0.2 to 0.45
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.025