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EN 1.4655 Stainless Steel vs. EN 1.7321 Steel

Both EN 1.4655 stainless steel and EN 1.7321 steel are iron alloys. They have 70% 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 1.4655 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 0.27
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 720 to 730
490 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1050
410
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
45
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.5
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.9
1.5
Embodied Energy, MJ/kg 41
20
Embodied Water, L/kg 160
50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
17 to 52
Strength to Weight: Bending, points 23
18 to 36
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 20
14 to 43

Alloy Composition

Carbon (C), % 0 to 0.030
0.17 to 0.23
Chromium (Cr), % 22 to 24
0.3 to 0.6
Copper (Cu), % 1.0 to 3.0
0 to 0.25
Iron (Fe), % 63.6 to 73.4
97.1 to 98.4
Manganese (Mn), % 0 to 2.0
0.7 to 1.0
Molybdenum (Mo), % 0.1 to 0.6
0.4 to 0.5
Nickel (Ni), % 3.5 to 5.5
0
Nitrogen (N), % 0.050 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.015
0 to 0.025