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EN 1.5501 Steel vs. EN 1.7720 Steel

Both EN 1.5501 steel and EN 1.7720 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 30 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 1.5501 steel and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120 to 150
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 17
19
Fatigue Strength, MPa 180 to 270
230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 390 to 510
590
Tensile Strength: Yield (Proof), MPa 260 to 420
340

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
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.4
2.2
Embodied Energy, MJ/kg 18
30
Embodied Water, L/kg 46
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 40 to 83
97
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 460
300
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 14 to 18
21
Strength to Weight: Bending, points 15 to 18
20
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 11 to 15
17

Alloy Composition

Boron (B), % 0.00080 to 0.0050
0
Carbon (C), % 0.13 to 0.16
0.1 to 0.15
Chromium (Cr), % 0
0.3 to 0.5
Copper (Cu), % 0 to 0.25
0 to 0.3
Iron (Fe), % 98.4 to 99.269
96.6 to 98.6
Manganese (Mn), % 0.6 to 0.8
0.4 to 0.7
Molybdenum (Mo), % 0
0.4 to 0.6
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.3
0 to 0.45
Sulfur (S), % 0 to 0.025
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3