Primary uses are for corrosion resistance and in chemical applications, such as heat exchangers, car and motorcycle exhaust systems and industry piping systems.
| Chemistry Limits | ||||
| All in max % | Grade 1 | Grade 2 | Grade 3 | Grade 4 |
| O2 | 0.18 | 0.25 | 0.35 | 0.4 |
| Fe | 0.2 | 0.2 | 0.2 | 0.3 |
| H2 | 0.015 | 0.015 | 0.015 | 0.015 |
| C | 0.1 | 0.1 | 0.1 | 0.1 |
| N2 | 0.03 | 0.03 | 0.05 | 0.05 |
| Mechanical Properties* | ||||
| Minimum | Grade 1 | Grade 2 | Grade 3 | Grade 4 |
| Ultimate Tensile Strength - ksi | 35 | 50 | 65 | 80 |
| Yield Strength - ksi | 25 | 40 | 55 | 70 |
| Elongation % | 25 | 20 | 18 | 15 |
| * ASTM Room Temperature Properties for bar | ||||
| Physical Properties | ||||
| Grade 1 | Grade 2 | Grade 3 | Grade 4 | |
| Density (lbs/in3) | 0.163 | 0.163 | 0.163 | 0.164 |
| Elastic Modulus (x106 psi) | 14.9 | 14.9 | 14.9 | 15.1 |
| Beta Transus Temp (oF) | 1630 | 1675 | 1690 | 1740 |
| Weldability | Excellent | Excellent | Good | Good |