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EN 1.7321 Steel vs. EN 1.4034 Stainless Steel

Both EN 1.7321 steel and EN 1.4034 stainless steel are iron alloys. They have 86% 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 1.4034 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 490 to 1460
690 to 900

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 410
770
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 45
30
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
7.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.0
Embodied Energy, MJ/kg 20
27
Embodied Water, L/kg 50
100

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 52
25 to 32
Strength to Weight: Bending, points 18 to 36
22 to 27
Thermal Diffusivity, mm2/s 12
8.1
Thermal Shock Resistance, points 14 to 43
24 to 32

Alloy Composition

Carbon (C), % 0.17 to 0.23
0.43 to 0.5
Chromium (Cr), % 0.3 to 0.6
12.5 to 14.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 97.1 to 98.4
83 to 87.1
Manganese (Mn), % 0.7 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.5
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.015