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EN 1.7720 Steel vs. EN 1.5663 Steel

Both EN 1.7720 steel and EN 1.5663 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a moderately high 91% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.7720 steel and the bottom bar is EN 1.5663 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
20
Fatigue Strength, MPa 230
450
Impact Strength: V-Notched Charpy, J 30
120
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 590
750
Tensile Strength: Yield (Proof), MPa 340
660

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
430
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
8.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
9.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
7.5
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 2.2
2.3
Embodied Energy, MJ/kg 30
31
Embodied Water, L/kg 51
63

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 97
150
Resilience: Unit (Modulus of Resilience), kJ/m3 300
1150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
26
Strength to Weight: Bending, points 20
23
Thermal Shock Resistance, points 17
22

Alloy Composition

Carbon (C), % 0.1 to 0.15
0 to 0.1
Chromium (Cr), % 0.3 to 0.5
0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 96.6 to 98.6
88.6 to 91.2
Manganese (Mn), % 0.4 to 0.7
0.3 to 0.8
Molybdenum (Mo), % 0.4 to 0.6
0 to 0.1
Nickel (Ni), % 0 to 0.4
8.5 to 10
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0 to 0.45
0 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.0050
Vanadium (V), % 0.22 to 0.3
0 to 0.010