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EN 1.8550 Steel vs. EN 1.7230 Steel

Both EN 1.8550 steel and EN 1.7230 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.8550 steel and the bottom bar is EN 1.7230 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
220 to 270
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
11 to 12
Fatigue Strength, MPa 470
320 to 460
Impact Strength: V-Notched Charpy, J 34
29 to 30
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 1000
720 to 910
Tensile Strength: Yield (Proof), MPa 760
510 to 740

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
420
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 40
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
2.4
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 67
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
79 to 97
Resilience: Unit (Modulus of Resilience), kJ/m3 1550
700 to 1460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 36
26 to 32
Strength to Weight: Bending, points 29
23 to 27
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 29
21 to 27

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.3 to 0.37
0.3 to 0.37
Chromium (Cr), % 1.5 to 1.8
0.8 to 1.2
Iron (Fe), % 94.4 to 96.3
96.7 to 98.3
Manganese (Mn), % 0.4 to 0.7
0.5 to 0.8
Molybdenum (Mo), % 0.15 to 0.25
0.15 to 0.3
Nickel (Ni), % 0.85 to 1.2
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.035
0 to 0.030