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EN 1.7390 Steel vs. EN 1.7218 Steel

Both EN 1.7390 steel and EN 1.7218 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 25 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 1.7390 steel and the bottom bar is EN 1.7218 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
150 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Tensile Strength: Ultimate (UTS), MPa 710
500 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 510
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.5
Embodied Energy, MJ/kg 23
20
Embodied Water, L/kg 69
52

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
18 to 55
Strength to Weight: Bending, points 23
18 to 38
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 20
15 to 46

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0 to 0.18
0.22 to 0.29
Chromium (Cr), % 4.0 to 6.0
0.9 to 1.2
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 91.9 to 95.3
96.2 to 98.1
Manganese (Mn), % 0.3 to 0.8
0.6 to 0.9
Molybdenum (Mo), % 0.45 to 0.65
0.15 to 0.3
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035