H1025 Hardened S17400 Stainless Steel vs. H925 Hardened S17400 Stainless Steel
Both H1025 hardened S17400 stainless steel and H925 hardened S17400 stainless 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 H1025 hardened S17400 stainless steel and the bottom bar is H925 hardened S17400 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 370 | |
| 430 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 13 | |
| 11 |
| Fatigue Strength, MPa | 600 | |
| 670 |
| Impact Strength: V-Notched Charpy, J | 23 | |
| 7.6 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Reduction in Area, % | 50 | |
| 43 |
| Rockwell C Hardness | 37 | |
| 43 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 690 | |
| 780 |
| Tensile Strength: Ultimate (UTS), MPa | 1140 | |
| 1310 |
| Tensile Strength: Yield (Proof), MPa | 1060 | |
| 1220 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 450 | |
| 450 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 850 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1440 |
| Melting Onset (Solidus), °C | 1400 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 17 | |
| 17 |
| Thermal Expansion, µm/m-K | 11 | |
| 11 |
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 | 14 | |
| 14 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 2.7 |
| Embodied Energy, MJ/kg | 39 | |
| 39 |
| Embodied Water, L/kg | 130 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 | |
| 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2910 | |
| 3860 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 41 | |
| 47 |
| Strength to Weight: Bending, points | 31 | |
| 34 |
| Thermal Diffusivity, mm2/s | 4.5 | |
| 4.5 |
| Thermal Shock Resistance, points | 38 | |
| 43 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.070 |
| Chromium (Cr), % | 15 to 17 | |
| 15 to 17 |
| Copper (Cu), % | 3.0 to 5.0 | |
| 3.0 to 5.0 |
| Iron (Fe), % | 70.4 to 78.9 | |
| 70.4 to 78.9 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.0 |
| Nickel (Ni), % | 3.0 to 5.0 | |
| 3.0 to 5.0 |
| Niobium (Nb), % | 0.15 to 0.45 | |
| 0.15 to 0.45 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |