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EN 1.5680 Steel vs. EN 1.8866 Steel

Both EN 1.5680 steel and EN 1.8866 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.5680 steel and the bottom bar is EN 1.8866 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
25
Fatigue Strength, MPa 310
260
Impact Strength: V-Notched Charpy, J 71
67
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 390
350
Tensile Strength: Ultimate (UTS), MPa 620
540
Tensile Strength: Yield (Proof), MPa 440
350

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
410
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
48
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
2.4
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.9
1.6
Embodied Energy, MJ/kg 26
21
Embodied Water, L/kg 55
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 510
330
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
19
Strength to Weight: Bending, points 20
19
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 18
16

Alloy Composition

Boron (B), % 0
0 to 0.0050
Carbon (C), % 0 to 0.15
0 to 0.16
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 93.4 to 95
96.3 to 100
Manganese (Mn), % 0.3 to 0.8
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.25
Nickel (Ni), % 4.8 to 5.3
0 to 0.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.0050
0 to 0.010
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0 to 0.050
0 to 0.060
Zirconium (Zr), % 0
0 to 0.050