EN 1.4640 Stainless Steel vs. AISI 317 Stainless Steel
Both EN 1.4640 stainless steel and AISI 317 stainless steel are iron alloys. They have 89% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is AISI 317 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 190 to 200 | |
170 to 220 |
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
200 |
Elongation at Break, % | 51 | |
35 to 55 |
Fatigue Strength, MPa | 230 to 250 | |
250 to 330 |
Poisson's Ratio | 0.28 | |
0.28 |
Shear Modulus, GPa | 77 | |
79 |
Shear Strength, MPa | 440 to 460 | |
420 to 470 |
Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
580 to 710 |
Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
250 to 420 |
Thermal Properties
Latent Heat of Fusion, J/g | 280 | |
290 |
Maximum Temperature: Corrosion, °C | 420 | |
420 |
Maximum Temperature: Mechanical, °C | 930 | |
590 |
Melting Completion (Liquidus), °C | 1420 | |
1400 |
Melting Onset (Solidus), °C | 1380 | |
1380 |
Specific Heat Capacity, J/kg-K | 480 | |
470 |
Thermal Conductivity, W/m-K | 15 | |
15 |
Thermal Expansion, µm/m-K | 16 | |
17 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
2.3 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
2.6 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 14 | |
21 |
Density, g/cm3 | 7.8 | |
7.9 |
Embodied Carbon, kg CO2/kg material | 2.8 | |
4.3 |
Embodied Energy, MJ/kg | 40 | |
59 |
Embodied Water, L/kg | 150 | |
160 |
Common Calculations
PREN (Pitting Resistance) | 20 | |
31 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
210 to 260 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 170 | |
150 to 430 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 25 | |
25 |
Strength to Weight: Axial, points | 22 to 23 | |
20 to 25 |
Strength to Weight: Bending, points | 21 | |
20 to 22 |
Thermal Diffusivity, mm2/s | 4.0 | |
4.1 |
Thermal Shock Resistance, points | 14 to 15 | |
12 to 15 |
Alloy Composition
Carbon (C), % | 0.030 to 0.080 | |
0 to 0.080 |
Chromium (Cr), % | 18 to 19 | |
18 to 20 |
Copper (Cu), % | 1.3 to 2.0 | |
0 |
Iron (Fe), % | 67.4 to 73.6 | |
58 to 68 |
Manganese (Mn), % | 1.5 to 4.0 | |
0 to 2.0 |
Molybdenum (Mo), % | 0 | |
3.0 to 4.0 |
Nickel (Ni), % | 5.5 to 6.9 | |
11 to 15 |
Nitrogen (N), % | 0.030 to 0.11 | |
0 to 0.1 |
Phosphorus (P), % | 0 to 0.045 | |
0 to 0.045 |
Silicon (Si), % | 0 to 0.5 | |
0 to 0.75 |
Sulfur (S), % | 0 to 0.015 | |
0 to 0.030 |