EN 1.4401 +C700 Steel vs. EN 1.4401 +C900 Steel
Both EN 1.4401 +C700 steel and EN 1.4401 +C900 steel are variants of the same material. They share alloy composition and many physical properties, but develop different mechanical properties as a result of different processing.
For each property being compared, the top bar is EN 1.4401 +C700 steel and the bottom bar is EN 1.4401 +C900 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 240 | |
| 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 22 | |
| 14 |
| Fatigue Strength, MPa | 260 | |
| 320 |
| Impact Strength: V-Notched Charpy, J | 91 | |
| 91 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 78 |
| Shear Strength, MPa | 490 | |
| 550 |
| Tensile Strength: Ultimate (UTS), MPa | 780 | |
| 900 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 410 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 950 | |
| 950 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1440 |
| Melting Onset (Solidus), °C | 1400 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 15 |
| Thermal Expansion, µm/m-K | 16 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.3 | |
| 2.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
| 2.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 19 | |
| 19 |
| Density, g/cm3 | 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.8 | |
| 3.8 |
| Embodied Energy, MJ/kg | 52 | |
| 52 |
| Embodied Water, L/kg | 150 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 26 | |
| 26 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 390 | |
| 800 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 27 | |
| 32 |
| Strength to Weight: Bending, points | 24 | |
| 26 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 4.0 |
| Thermal Shock Resistance, points | 17 | |
| 20 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.070 |
| Chromium (Cr), % | 16.5 to 18.5 | |
| 16.5 to 18.5 |
| Iron (Fe), % | 62.8 to 71.5 | |
| 62.8 to 71.5 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 2.0 to 2.5 | |
| 2.0 to 2.5 |
| Nickel (Ni), % | 10 to 13 | |
| 10 to 13 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |