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EN 1.7720 Steel vs. EN 1.0255 Steel

Both EN 1.7720 steel and EN 1.0255 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.0255 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
120
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
27
Fatigue Strength, MPa 230
180
Impact Strength: V-Notched Charpy, J 30
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 590
430
Tensile Strength: Yield (Proof), MPa 340
250

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
40
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.5
Embodied Energy, MJ/kg 30
19
Embodied Water, L/kg 51
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 97
100
Resilience: Unit (Modulus of Resilience), kJ/m3 300
160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
15
Strength to Weight: Bending, points 20
16
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 17
14

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.2
Carbon (C), % 0.1 to 0.15
0 to 0.16
Chromium (Cr), % 0.3 to 0.5
0 to 0.3
Copper (Cu), % 0 to 0.3
0 to 0.3
Iron (Fe), % 96.6 to 98.6
94.1 to 99.98
Manganese (Mn), % 0.4 to 0.7
0 to 1.2
Molybdenum (Mo), % 0.4 to 0.6
0 to 0.080
Nickel (Ni), % 0 to 0.4
0 to 0.3
Niobium (Nb), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.45
0 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.015
Titanium (Ti), % 0
0 to 0.040
Vanadium (V), % 0.22 to 0.3
0 to 0.020