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EN 1.1181 Steel vs. EN 1.8550 Steel

Both EN 1.1181 steel and EN 1.8550 steel are iron alloys. They have a very high 97% 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 1.1181 steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19 to 20
11
Fatigue Strength, MPa 190 to 260
470
Impact Strength: V-Notched Charpy, J 23 to 38
34
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 350 to 390
600
Tensile Strength: Ultimate (UTS), MPa 560 to 620
1000
Tensile Strength: Yield (Proof), MPa 280 to 380
760

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
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 42
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
3.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.7
Embodied Energy, MJ/kg 19
23
Embodied Water, L/kg 47
67

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 380
1550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 22
36
Strength to Weight: Bending, points 19 to 21
29
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 19 to 21
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.32 to 0.39
0.3 to 0.37
Chromium (Cr), % 0 to 0.4
1.5 to 1.8
Iron (Fe), % 97.4 to 99.18
94.4 to 96.3
Manganese (Mn), % 0.5 to 0.8
0.4 to 0.7
Molybdenum (Mo), % 0 to 0.1
0.15 to 0.25
Nickel (Ni), % 0 to 0.4
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