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EN 1.7321 Steel vs. EN 1.4959 Stainless Steel

Both EN 1.7321 steel and EN 1.4959 stainless steel are iron alloys. They have 47% 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 EN 1.4959 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
77
Tensile Strength: Ultimate (UTS), MPa 490 to 1460
630

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 410
1090
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 45
12
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
31
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.5
5.4
Embodied Energy, MJ/kg 20
76
Embodied Water, L/kg 50
200

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 52
22
Strength to Weight: Bending, points 18 to 36
20
Thermal Diffusivity, mm2/s 12
3.2
Thermal Shock Resistance, points 14 to 43
15

Alloy Composition

Aluminum (Al), % 0
0.25 to 0.65
Carbon (C), % 0.17 to 0.23
0.050 to 0.1
Chromium (Cr), % 0.3 to 0.6
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0 to 0.25
0 to 0.5
Iron (Fe), % 97.1 to 98.4
39.4 to 50.5
Manganese (Mn), % 0.7 to 1.0
0 to 1.5
Molybdenum (Mo), % 0.4 to 0.5
0
Nickel (Ni), % 0
30 to 34
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.025
0 to 0.015
Silicon (Si), % 0 to 0.3
0 to 0.7
Sulfur (S), % 0 to 0.025
0 to 0.010
Titanium (Ti), % 0
0.25 to 0.65