EN 1.6554 Steel vs. EN 1.7725 Steel
Both EN 1.6554 steel and EN 1.7725 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 (1, in this case) are not shown.
For each property being compared, the top bar is EN 1.6554 steel and the bottom bar is EN 1.7725 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 230 to 280 | |
250 to 300 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 17 to 21 | |
14 |
Fatigue Strength, MPa | 380 to 520 | |
390 to 550 |
Impact Strength: V-Notched Charpy, J | 30 to 45 | |
34 to 35 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
73 |
Tensile Strength: Ultimate (UTS), MPa | 780 to 930 | |
830 to 1000 |
Tensile Strength: Yield (Proof), MPa | 550 to 790 | |
610 to 860 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
250 |
Maximum Temperature: Mechanical, °C | 420 | |
440 |
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 | 40 | |
39 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.6 | |
7.4 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
8.6 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 3.4 | |
2.9 |
Density, g/cm3 | 7.9 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.7 | |
1.8 |
Embodied Energy, MJ/kg | 22 | |
24 |
Embodied Water, L/kg | 53 | |
54 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 150 | |
110 to 130 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 810 to 1650 | |
980 to 1940 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 27 to 33 | |
29 to 35 |
Strength to Weight: Bending, points | 24 to 27 | |
25 to 28 |
Thermal Diffusivity, mm2/s | 11 | |
11 |
Thermal Shock Resistance, points | 23 to 27 | |
24 to 29 |
Alloy Composition
Carbon (C), % | 0.23 to 0.28 | |
0.27 to 0.34 |
Chromium (Cr), % | 0.7 to 0.9 | |
1.3 to 1.7 |
Copper (Cu), % | 0 to 0.3 | |
0 |
Iron (Fe), % | 94.6 to 97.3 | |
95.7 to 97.5 |
Manganese (Mn), % | 0.6 to 0.9 | |
0.6 to 1.0 |
Molybdenum (Mo), % | 0.2 to 0.3 | |
0.3 to 0.5 |
Nickel (Ni), % | 1.0 to 2.0 | |
0 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.025 |
Silicon (Si), % | 0 to 0.6 | |
0 to 0.6 |
Sulfur (S), % | 0 to 0.025 | |
0 to 0.030 |
Vanadium (V), % | 0 to 0.030 | |
0.050 to 0.15 |