ACI-ASTM CN7MS Steel vs. EN 1.4855 Stainless Steel
Both ACI-ASTM CN7MS steel and EN 1.4855 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.
For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is EN 1.4855 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 | |
| 150 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 39 | |
| 4.6 |
| Fatigue Strength, MPa | 200 | |
| 120 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 540 | |
| 500 |
| Tensile Strength: Yield (Proof), MPa | 230 | |
| 250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 340 | |
| 320 |
| Maximum Temperature: Corrosion, °C | 420 | |
| 610 |
| Maximum Temperature: Mechanical, °C | 1040 | |
| 1050 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1400 |
| Melting Onset (Solidus), °C | 1350 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 14 |
| Thermal Expansion, µm/m-K | 16 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 28 | |
| 34 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 5.9 |
| Embodied Energy, MJ/kg | 71 | |
| 85 |
| Embodied Water, L/kg | 180 | |
| 200 |
Common Calculations
| PREN (Pitting Resistance) | 28 | |
| 25 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 170 | |
| 19 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 | |
| 160 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 19 | |
| 18 |
| Strength to Weight: Bending, points | 19 | |
| 18 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 3.7 |
| Thermal Shock Resistance, points | 13 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0.3 to 0.5 |
| Chromium (Cr), % | 18 to 20 | |
| 23 to 25 |
| Copper (Cu), % | 1.5 to 2.0 | |
| 0 |
| Iron (Fe), % | 45.4 to 53.5 | |
| 42.6 to 51.9 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 2.5 to 3.0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 22 to 25 | |
| 23 to 25 |
| Niobium (Nb), % | 0 | |
| 0.8 to 1.8 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 2.5 to 3.5 | |
| 1.0 to 2.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |