ASTM A268/ASME SA268 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
Chemical Composition of ASTM A268 TP444 Stainless Steel Pipes
| C % | Mn % | P % | S % | Si % | Cr % | Ni % | Mo % | N % | Ti+Nb % |
| 0.025 max | 1.00 max | 0.040 max | 0.030 max | 1.00 max | 17.5-19.5 | 1.00 max | 1.75-2.5 max | 0.035 max | [0.20+4(C+N)]-0.80 |
Mechanical Properties of ASTM A268 TP444 Stainless Steel Pipes
| Tensile Strength, Mpa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 415 min | 275 min | 20 min | 217 max |