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EN 1.4618 Stainless Steel vs. EN 1.7231 Steel

Both EN 1.4618 stainless steel and EN 1.7231 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 1.4618 stainless steel and the bottom bar is EN 1.7231 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
240 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 51
11 to 12
Fatigue Strength, MPa 240 to 250
360 to 500
Impact Strength: V-Notched Charpy, J 90 to 91
28 to 30
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 680 to 700
790 to 930
Tensile Strength: Yield (Proof), MPa 250 to 260
570 to 800

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 900
420
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.7
1.5
Embodied Energy, MJ/kg 39
20
Embodied Water, L/kg 150
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
87 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
870 to 1700
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24 to 25
28 to 33
Strength to Weight: Bending, points 22 to 23
24 to 27
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 15 to 16
23 to 27

Alloy Composition

Carbon (C), % 0 to 0.1
0.38 to 0.45
Chromium (Cr), % 16.5 to 18.5
0.8 to 1.2
Copper (Cu), % 1.0 to 2.5
0
Iron (Fe), % 62.7 to 72.5
96.4 to 98.1
Manganese (Mn), % 5.5 to 9.5
0.6 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.3
Nickel (Ni), % 4.5 to 5.5
0
Nitrogen (N), % 0 to 0.15
0
Phosphorus (P), % 0 to 0.070
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.030

Comparable Variants