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EN 1.3956 Stainless Steel vs. EN 1.7321 Steel

Both EN 1.3956 stainless steel and EN 1.7321 steel are iron alloys. They have 59% of their average alloy composition in common. There are 20 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 1.3956 stainless steel and the bottom bar is EN 1.7321 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 79
73
Tensile Strength: Ultimate (UTS), MPa 650
490 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1080
410
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 22
2.5
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.8
1.5
Embodied Energy, MJ/kg 68
20
Embodied Water, L/kg 180
50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
17 to 52
Strength to Weight: Bending, points 21
18 to 36
Thermal Shock Resistance, points 18
14 to 43

Alloy Composition

Carbon (C), % 0 to 0.060
0.17 to 0.23
Chromium (Cr), % 20.5 to 23.5
0.3 to 0.6
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 51.9 to 62.1
97.1 to 98.4
Manganese (Mn), % 4.0 to 6.0
0.7 to 1.0
Molybdenum (Mo), % 1.5 to 3.0
0.4 to 0.5
Nickel (Ni), % 11.5 to 13.5
0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
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 0.030
0 to 0.025
Vanadium (V), % 0.1 to 0.3
0