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EN 1.1170 Steel vs. EN 1.1181 Steel

Both EN 1.1170 steel and EN 1.1181 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 1.1181 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16 to 17
19 to 20
Fatigue Strength, MPa 220 to 330
190 to 260
Impact Strength: V-Notched Charpy, J 28 to 35
23 to 38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 390 to 450
350 to 390
Tensile Strength: Ultimate (UTS), MPa 640 to 730
560 to 620
Tensile Strength: Yield (Proof), MPa 330 to 500
280 to 380

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
42
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.3

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
90 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 670
210 to 380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 26
20 to 22
Strength to Weight: Bending, points 21 to 23
19 to 21
Thermal Diffusivity, mm2/s 13
11
Thermal Shock Resistance, points 20 to 23
19 to 21

Alloy Composition

Carbon (C), % 0.25 to 0.32
0.32 to 0.39
Chromium (Cr), % 0 to 0.4
0 to 0.4
Iron (Fe), % 96.7 to 98.5
97.4 to 99.18
Manganese (Mn), % 1.3 to 1.7
0.5 to 0.8
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