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EN 1.1158 Steel vs. EN 1.8868 Steel

Both EN 1.1158 steel and EN 1.8868 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.1158 steel and the bottom bar is EN 1.8868 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 150
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23 to 24
25
Fatigue Strength, MPa 170 to 220
260
Impact Strength: V-Notched Charpy, J 28 to 40
90
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 300 to 320
350
Tensile Strength: Ultimate (UTS), MPa 470 to 500
540
Tensile Strength: Yield (Proof), MPa 240 to 310
350

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
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 49
48
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.6
Embodied Energy, MJ/kg 19
21
Embodied Water, L/kg 47
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 250
330
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 18
19
Strength to Weight: Bending, points 17 to 18
19
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 15 to 16
16

Alloy Composition

Boron (B), % 0
0 to 0.0050
Carbon (C), % 0.22 to 0.29
0 to 0.16
Chromium (Cr), % 0 to 0.4
0 to 0.3
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 97.6 to 99.38
96.4 to 100
Manganese (Mn), % 0.4 to 0.7
0 to 1.5
Molybdenum (Mo), % 0 to 0.1
0 to 0.25
Nickel (Ni), % 0 to 0.4
0 to 0.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.035
0 to 0.0080
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0 to 0.060
Zirconium (Zr), % 0
0 to 0.050