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EN 1.7231 Steel vs. EN 1.4404 Stainless Steel

Both EN 1.7231 steel and EN 1.4404 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.7231 steel and the bottom bar is EN 1.4404 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240 to 280
190 to 270
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 12
14 to 43
Fatigue Strength, MPa 360 to 500
220 to 320
Impact Strength: V-Notched Charpy, J 28 to 30
91 to 93
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 790 to 930
600 to 900
Tensile Strength: Yield (Proof), MPa 570 to 800
240 to 570

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
950
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
19
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
3.8
Embodied Energy, MJ/kg 20
52
Embodied Water, L/kg 51
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 100
110 to 210
Resilience: Unit (Modulus of Resilience), kJ/m3 870 to 1700
140 to 800
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 33
21 to 32
Strength to Weight: Bending, points 24 to 27
20 to 26
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 23 to 27
13 to 20

Alloy Composition

Carbon (C), % 0.38 to 0.45
0 to 0.030
Chromium (Cr), % 0.8 to 1.2
16.5 to 18.5
Iron (Fe), % 96.4 to 98.1
62.8 to 71.5
Manganese (Mn), % 0.6 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.15 to 0.3
2.0 to 2.5
Nickel (Ni), % 0
10 to 13
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015

Comparable Variants