EN 1.4309 Stainless Steel vs. ACI-ASTM CG8M Steel
Both EN 1.4309 stainless steel and ACI-ASTM CG8M steel are iron alloys. They have a very high 95% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4309 stainless steel and the bottom bar is ACI-ASTM CG8M steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 140 | |
180 |
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
200 |
Elongation at Break, % | 34 | |
45 |
Fatigue Strength, MPa | 170 | |
280 |
Impact Strength: V-Notched Charpy, J | 90 | |
110 |
Poisson's Ratio | 0.28 | |
0.28 |
Shear Modulus, GPa | 77 | |
79 |
Tensile Strength: Ultimate (UTS), MPa | 490 | |
550 |
Tensile Strength: Yield (Proof), MPa | 210 | |
300 |
Thermal Properties
Latent Heat of Fusion, J/g | 290 | |
300 |
Maximum Temperature: Corrosion, °C | 420 | |
420 |
Maximum Temperature: Mechanical, °C | 960 | |
1020 |
Melting Completion (Liquidus), °C | 1420 | |
1450 |
Melting Onset (Solidus), °C | 1380 | |
1400 |
Specific Heat Capacity, J/kg-K | 480 | |
470 |
Thermal Conductivity, W/m-K | 15 | |
16 |
Thermal Expansion, µm/m-K | 17 | |
16 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
2.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
2.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 16 | |
20 |
Density, g/cm3 | 7.8 | |
7.9 |
Embodied Carbon, kg CO2/kg material | 3.1 | |
4.1 |
Embodied Energy, MJ/kg | 45 | |
56 |
Embodied Water, L/kg | 150 | |
160 |
Common Calculations
PREN (Pitting Resistance) | 21 | |
31 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 | |
210 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 110 | |
220 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 25 | |
25 |
Strength to Weight: Axial, points | 18 | |
19 |
Strength to Weight: Bending, points | 18 | |
19 |
Thermal Diffusivity, mm2/s | 4.1 | |
4.3 |
Thermal Shock Resistance, points | 11 | |
12 |
Alloy Composition
Carbon (C), % | 0 to 0.030 | |
0 to 0.080 |
Chromium (Cr), % | 18 to 20 | |
18 to 21 |
Iron (Fe), % | 64.2 to 73 | |
58.8 to 70 |
Manganese (Mn), % | 0 to 2.0 | |
0 to 1.5 |
Molybdenum (Mo), % | 0 | |
3.0 to 4.0 |
Nickel (Ni), % | 9.0 to 12 | |
9.0 to 13 |
Nitrogen (N), % | 0 to 0.2 | |
0 |
Phosphorus (P), % | 0 to 0.035 | |
0 to 0.040 |
Silicon (Si), % | 0 to 1.5 | |
0 to 1.5 |
Sulfur (S), % | 0 to 0.025 | |
0 to 0.040 |