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EN 1.1181 Steel vs. EN 1.0255 Steel

Both EN 1.1181 steel and EN 1.0255 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 1.1181 steel and the bottom bar is EN 1.0255 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
120
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19 to 20
27
Fatigue Strength, MPa 190 to 260
180
Impact Strength: V-Notched Charpy, J 23 to 38
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 350 to 390
280
Tensile Strength: Ultimate (UTS), MPa 560 to 620
430
Tensile Strength: Yield (Proof), MPa 280 to 380
250

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
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 42
40
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 47
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 380
160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 22
15
Strength to Weight: Bending, points 19 to 21
16
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 19 to 21
14

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.2
Carbon (C), % 0.32 to 0.39
0 to 0.16
Chromium (Cr), % 0 to 0.4
0 to 0.3
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 97.4 to 99.18
94.1 to 99.98
Manganese (Mn), % 0.5 to 0.8
0 to 1.2
Molybdenum (Mo), % 0 to 0.1
0 to 0.080
Nickel (Ni), % 0 to 0.4
0 to 0.3
Niobium (Nb), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.015
Titanium (Ti), % 0
0 to 0.040
Vanadium (V), % 0
0 to 0.020