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EN 1.8818 Steel vs. EN 1.5450 Steel

Both EN 1.8818 steel and EN 1.5450 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 1.5450 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 27
19
Fatigue Strength, MPa 200
310
Impact Strength: V-Notched Charpy, J 48
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 280
380
Tensile Strength: Ultimate (UTS), MPa 440
620
Tensile Strength: Yield (Proof), MPa 270
460

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 48
49
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.6
1.5
Embodied Energy, MJ/kg 21
20
Embodied Water, L/kg 49
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 200
550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16
22
Strength to Weight: Bending, points 16
20
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 13
18

Alloy Composition

Aluminum (Al), % 0.015 to 0.034
0 to 0.060
Boron (B), % 0
0.0020 to 0.0060
Carbon (C), % 0 to 0.15
0.060 to 0.1
Chromium (Cr), % 0 to 0.35
0 to 0.2
Copper (Cu), % 0 to 0.6
0 to 0.3
Iron (Fe), % 95.9 to 99.985
97.6 to 98.8
Manganese (Mn), % 0 to 1.6
0.6 to 0.8
Molybdenum (Mo), % 0 to 0.13
0.4 to 0.5
Nickel (Ni), % 0 to 0.35
0
Niobium (Nb), % 0 to 0.060
0
Nitrogen (N), % 0 to 0.017
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.55
0.1 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0 to 0.060
0 to 0.060
Vanadium (V), % 0 to 0.1
0