AISI 347 Stainless Steel vs. AISI 304 Stainless Steel
Both AISI 347 stainless steel and AISI 304 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is AISI 347 stainless steel and the bottom bar is AISI 304 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 210 | |
| 170 to 360 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 34 to 46 | |
| 8.0 to 43 |
| Fatigue Strength, MPa | 220 to 270 | |
| 210 to 440 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 430 to 460 | |
| 400 to 690 |
| Tensile Strength: Ultimate (UTS), MPa | 610 to 690 | |
| 580 to 1180 |
| Tensile Strength: Yield (Proof), MPa | 240 to 350 | |
| 230 to 860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 480 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 710 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1450 |
| Melting Onset (Solidus), °C | 1400 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 16 |
| Thermal Expansion, µm/m-K | 17 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 19 | |
| 15 |
| Calomel Potential, mV | -80 | |
| -80 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 3.0 |
| Embodied Energy, MJ/kg | 52 | |
| 43 |
| Embodied Water, L/kg | 150 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 to 220 | |
| 86 to 250 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 310 | |
| 140 to 1870 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 25 | |
| 21 to 42 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 20 to 32 |
| Thermal Diffusivity, mm2/s | 4.3 | |
| 4.2 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 12 to 25 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.080 |
| Chromium (Cr), % | 17 to 19 | |
| 18 to 20 |
| Iron (Fe), % | 64.1 to 74 | |
| 66.5 to 74 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 2.0 |
| Nickel (Ni), % | 9.0 to 13 | |
| 8.0 to 10.5 |
| Niobium (Nb), % | 0 to 1.0 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |