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EN 1.7218 Steel vs. EN 1.4557 Stainless Steel

Both EN 1.7218 steel and EN 1.4557 stainless steel are iron alloys. They have 55% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.7218 steel and the bottom bar is EN 1.4557 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 230
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 500 to 1550
560

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1090
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 44
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
29
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
5.6
Embodied Energy, MJ/kg 20
76
Embodied Water, L/kg 52
190

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 55
19
Strength to Weight: Bending, points 18 to 38
19
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 15 to 46
12

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.22 to 0.29
0 to 0.020
Chromium (Cr), % 0.9 to 1.2
19.5 to 20.5
Copper (Cu), % 0 to 0.3
0.5 to 1.0
Iron (Fe), % 96.2 to 98.1
49.5 to 56.3
Manganese (Mn), % 0.6 to 0.9
0 to 1.2
Molybdenum (Mo), % 0.15 to 0.3
6.0 to 7.0
Nickel (Ni), % 0 to 0.3
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.010