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EN 1.8550 Steel vs. EN 1.6587 Steel

Both EN 1.8550 steel and EN 1.6587 steel are iron alloys. Their average alloy composition is basically identical. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 1.6587 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
160 to 220
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 1000
520 to 1420

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
440
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
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
3.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.7
1.7
Embodied Energy, MJ/kg 23
22
Embodied Water, L/kg 67
58

Common Calculations

PREN (Pitting Resistance) 2.3
2.6
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 36
18 to 50
Strength to Weight: Bending, points 29
18 to 36
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 29
15 to 42

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0 to 0.050
Carbon (C), % 0.3 to 0.37
0.15 to 0.21
Chromium (Cr), % 1.5 to 1.8
1.5 to 1.8
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 94.4 to 96.3
94.4 to 96.4
Manganese (Mn), % 0.4 to 0.7
0.5 to 0.9
Molybdenum (Mo), % 0.15 to 0.25
0.25 to 0.35
Nickel (Ni), % 0.85 to 1.2
1.4 to 1.7
Oxygen (O), % 0
0 to 0.0020
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.035
0 to 0.030