ASTM A423/A423M Standard Specification for Seamless and Electric-Welded Low-Alloy Steel Tubes
Chemical Composition of ASTM A423/A423M Grade 3 Alloy Steel Pipes
| C % | Mn % | P % | S % | Si % | Cu % | Cr % | Ni % | Mo % | Sb % | |
| ASTM A423 Gr.3 | 0.06 max | 0.70-1.40 | 0.020 max | 0.020 max | 0.55 max | 0.25-0.45 | – | 0.50 max | 0.20 max | 0.05-0.15 |
| S-TEN1 | 0.14 max | 1.60 max | 0.025 max | 0.025 max | 0.55 max | 0.25-0.50 | – | 0.50 max | – | 0.15 max |
| 09CrCuSb | 0.12 max | 0.35-0.65 | 0.030 max | 0.020 max | 0.17-0.37 | 0.25-0.45 | 0.70-1.10 | – | – | 0.04-0.10 |
Mechanical Properties of ASTM A423/A423M Grade 3 Alloy Steel Pipes
| Tensile Strength, Mpa | Yield Strength, MPa | Elongation, % | |
| ASTM A423 Gr.3 | 380 min | 230 min | 35 min |
| S-TEN1 | 380 min | 230 min | 35 min |
| 09CrCuSb | 390-550 | 245 min | 30 min |