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EN 1.8818 Steel vs. EN 1.8898 Steel

Both EN 1.8818 steel and EN 1.8898 steel are iron alloys. Both are furnished in the thermomechanically rolled condition. 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 1.8898 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 27
18
Fatigue Strength, MPa 200
330
Impact Strength: V-Notched Charpy, J 48
45
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 280
370
Tensile Strength: Ultimate (UTS), MPa 440
600
Tensile Strength: Yield (Proof), MPa 270
490

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
49
Thermal Expansion, µm/m-K 13
13

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
2.2
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.6
Embodied Energy, MJ/kg 21
22
Embodied Water, L/kg 49
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 200
650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16
21
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
0.020 to 0.060
Carbon (C), % 0 to 0.15
0 to 0.16
Chromium (Cr), % 0 to 0.35
0
Copper (Cu), % 0 to 0.6
0
Iron (Fe), % 95.9 to 99.985
96.7 to 99.98
Manganese (Mn), % 0 to 1.6
0 to 1.7
Molybdenum (Mo), % 0 to 0.13
0 to 0.2
Nickel (Ni), % 0 to 0.35
0 to 0.3
Niobium (Nb), % 0 to 0.060
0 to 0.050
Nitrogen (N), % 0 to 0.017
0 to 0.025
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.55
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.060
0 to 0.050
Vanadium (V), % 0 to 0.1
0 to 0.12