Quarter-hard AISI 302 vs. Quarter-hard AISI 304
Both quarter-hard AISI 302 and quarter-hard AISI 304 are iron alloys. Both are furnished in the quarter-hard temper. They have a very high 99% of their average alloy composition in common.
For each property being compared, the top bar is quarter-hard AISI 302 and the bottom bar is quarter-hard AISI 304.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 300 | |
290 |
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
200 |
Elongation at Break, % | 14 | |
12 |
Fatigue Strength, MPa | 330 | |
320 |
Poisson's Ratio | 0.28 | |
0.28 |
Shear Modulus, GPa | 77 | |
77 |
Shear Strength, MPa | 590 | |
580 |
Tensile Strength: Ultimate (UTS), MPa | 980 | |
960 |
Tensile Strength: Yield (Proof), MPa | 580 | |
580 |
Thermal Properties
Latent Heat of Fusion, J/g | 280 | |
290 |
Maximum Temperature: Corrosion, °C | 410 | |
420 |
Maximum Temperature: Mechanical, °C | 710 | |
710 |
Melting Completion (Liquidus), °C | 1420 | |
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 | 2.8 | |
2.7 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 15 | |
15 |
Calomel Potential, mV | -70 | |
-80 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 3.0 | |
3.0 |
Embodied Energy, MJ/kg | 42 | |
43 |
Embodied Water, L/kg | 140 | |
150 |
Common Calculations
PREN (Pitting Resistance) | 19 | |
20 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
100 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 840 | |
860 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 25 | |
25 |
Strength to Weight: Axial, points | 35 | |
34 |
Strength to Weight: Bending, points | 28 | |
28 |
Thermal Diffusivity, mm2/s | 4.4 | |
4.2 |
Thermal Shock Resistance, points | 21 | |
21 |
Alloy Composition
Carbon (C), % | 0 to 0.15 | |
0 to 0.080 |
Chromium (Cr), % | 17 to 19 | |
18 to 20 |
Iron (Fe), % | 67.9 to 75 | |
66.5 to 74 |
Manganese (Mn), % | 0 to 2.0 | |
0 to 2.0 |
Nickel (Ni), % | 8.0 to 10 | |
8.0 to 10.5 |
Nitrogen (N), % | 0 to 0.1 | |
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 |