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EN 1.6580 Steel vs. EN 1.8550 Steel

Both EN 1.6580 steel and EN 1.8550 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.6580 steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 350
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 19
11
Fatigue Strength, MPa 310 to 610
470
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 450 to 700
600
Tensile Strength: Ultimate (UTS), MPa 720 to 1170
1000
Tensile Strength: Yield (Proof), MPa 460 to 990
760

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 450
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
3.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.7
Embodied Energy, MJ/kg 23
23
Embodied Water, L/kg 59
67

Common Calculations

PREN (Pitting Resistance) 3.3
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
100
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 2590
1550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 41
36
Strength to Weight: Bending, points 23 to 31
29
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 21 to 34
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.26 to 0.34
0.3 to 0.37
Chromium (Cr), % 1.8 to 2.2
1.5 to 1.8
Iron (Fe), % 93.7 to 95.5
94.4 to 96.3
Manganese (Mn), % 0.3 to 0.6
0.4 to 0.7
Molybdenum (Mo), % 0.3 to 0.5
0.15 to 0.25
Nickel (Ni), % 1.8 to 2.2
0.85 to 1.2
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.035
0 to 0.035