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EN 1.8958 Steel vs. EN 1.1158 Steel

Both EN 1.8958 steel and EN 1.1158 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.8958 steel and the bottom bar is EN 1.1158 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
140 to 150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
23 to 24
Fatigue Strength, MPa 150
170 to 220
Impact Strength: V-Notched Charpy, J 30
28 to 40
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 270
300 to 320
Tensile Strength: Ultimate (UTS), MPa 430
470 to 500
Tensile Strength: Yield (Proof), MPa 220
240 to 310

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
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 46
49
Thermal Expansion, µm/m-K 13
12

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 50
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 130
150 to 250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15
17 to 18
Strength to Weight: Bending, points 16
17 to 18
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 13
15 to 16

Alloy Composition

Carbon (C), % 0 to 0.16
0.22 to 0.29
Chromium (Cr), % 0.35 to 0.85
0 to 0.4
Copper (Cu), % 0.2 to 0.6
0
Iron (Fe), % 96.5 to 99.3
97.6 to 99.38
Manganese (Mn), % 0.15 to 0.7
0.4 to 0.7
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0 to 0.7
0 to 0.4
Nitrogen (N), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.45
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035