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EN 1.1170 Steel vs. EN 1.1158 Steel

Both EN 1.1170 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 1.1170 steel and the bottom bar is EN 1.1158 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
140 to 150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16 to 17
23 to 24
Fatigue Strength, MPa 220 to 330
170 to 220
Impact Strength: V-Notched Charpy, J 28 to 35
28 to 40
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 390 to 450
300 to 320
Tensile Strength: Ultimate (UTS), MPa 640 to 730
470 to 500
Tensile Strength: Yield (Proof), MPa 330 to 500
240 to 310

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 50
49
Thermal Expansion, µm/m-K 12
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 2.1
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 49
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 100
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 670
150 to 250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 26
17 to 18
Strength to Weight: Bending, points 21 to 23
17 to 18
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 20 to 23
15 to 16

Alloy Composition

Carbon (C), % 0.25 to 0.32
0.22 to 0.29
Chromium (Cr), % 0 to 0.4
0 to 0.4
Iron (Fe), % 96.7 to 98.5
97.6 to 99.38
Manganese (Mn), % 1.3 to 1.7
0.4 to 0.7
Molybdenum (Mo), % 0 to 0.1
0 to 0.1
Nickel (Ni), % 0 to 0.4
0 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.035
0 to 0.035

Comparable Variants