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EN 1.7218 Steel vs. EN 1.5918 Steel

Both EN 1.7218 steel and EN 1.5918 steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.7218 steel and the bottom bar is EN 1.5918 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 230
160 to 190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 500 to 1550
530 to 1390

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
440
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 44
43
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
3.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.6
Embodied Energy, MJ/kg 20
21
Embodied Water, L/kg 52
56

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 55
19 to 49
Strength to Weight: Bending, points 18 to 38
18 to 35
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 15 to 46
15 to 41

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.22 to 0.29
0.14 to 0.2
Chromium (Cr), % 0.9 to 1.2
1.4 to 1.7
Copper (Cu), % 0 to 0.3
0 to 0.25
Iron (Fe), % 96.2 to 98.1
94.9 to 96.6
Manganese (Mn), % 0.6 to 0.9
0.5 to 0.9
Molybdenum (Mo), % 0.15 to 0.3
0
Nickel (Ni), % 0 to 0.3
1.4 to 1.7
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.3
Sulfur (S), % 0 to 0.035
0 to 0.025

Comparable Variants