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EN 1.8918 Steel vs. EN 1.0254 Steel

Both EN 1.8918 steel and EN 1.0254 steel are iron alloys. Both are furnished in the normalized condition. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.8918 steel and the bottom bar is EN 1.0254 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
120
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
27
Fatigue Strength, MPa 330
190
Impact Strength: V-Notched Charpy, J 88
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 400
280
Tensile Strength: Ultimate (UTS), MPa 640
430
Tensile Strength: Yield (Proof), MPa 490
250

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 46
50
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
2.1
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.7
1.5
Embodied Energy, MJ/kg 24
19
Embodied Water, L/kg 51
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 640
170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
15
Strength to Weight: Bending, points 21
16
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 19
14

Alloy Composition

Aluminum (Al), % 0.020 to 0.050
0
Carbon (C), % 0 to 0.2
0 to 0.16
Chromium (Cr), % 0 to 0.3
0 to 0.3
Copper (Cu), % 0 to 0.7
0 to 0.3
Iron (Fe), % 95.2 to 98.9
97.2 to 100
Manganese (Mn), % 1.1 to 1.7
0 to 1.2
Molybdenum (Mo), % 0 to 0.1
0 to 0.080
Nickel (Ni), % 0 to 0.8
0 to 0.3
Niobium (Nb), % 0 to 0.050
0 to 0.010
Nitrogen (N), % 0 to 0.025
0
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 0.6
0 to 0.35
Sulfur (S), % 0 to 0.0050
0 to 0.020
Titanium (Ti), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0 to 0.2
0 to 0.020