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EN 1.8818 Steel vs. EN 1.1170 Steel

Both EN 1.8818 steel and EN 1.1170 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.8818 steel and the bottom bar is EN 1.1170 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 27
16 to 17
Fatigue Strength, MPa 200
220 to 330
Impact Strength: V-Notched Charpy, J 48
28 to 35
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 280
390 to 450
Tensile Strength: Ultimate (UTS), MPa 440
640 to 730
Tensile Strength: Yield (Proof), MPa 270
330 to 500

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 48
50
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.5
Embodied Energy, MJ/kg 21
19
Embodied Water, L/kg 49
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
91 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 200
290 to 670
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16
23 to 26
Strength to Weight: Bending, points 16
21 to 23
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 13
20 to 23

Alloy Composition

Aluminum (Al), % 0.015 to 0.034
0
Carbon (C), % 0 to 0.15
0.25 to 0.32
Chromium (Cr), % 0 to 0.35
0 to 0.4
Copper (Cu), % 0 to 0.6
0
Iron (Fe), % 95.9 to 99.985
96.7 to 98.5
Manganese (Mn), % 0 to 1.6
1.3 to 1.7
Molybdenum (Mo), % 0 to 0.13
0 to 0.1
Nickel (Ni), % 0 to 0.35
0 to 0.4
Niobium (Nb), % 0 to 0.060
0
Nitrogen (N), % 0 to 0.017
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.55
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035
Titanium (Ti), % 0 to 0.060
0
Vanadium (V), % 0 to 0.1
0