ASTM A268/ASME SA268 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
| Specification | ASTM A268/ASME SA268 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service |
| Standard | ASTM A268, ASME SA268 |
| Equivalents | |
| Materials | 26-3-3, S44660 |
Chemistry Composition of ASTM A268/ASME SA268 26-3-3, S44660
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Ni, % | Mo, % | N, % | Ti+Nb, % |
| 0.03 max | 1.00 max | 0.040 max | 0.030 max | 1.00 max | 25.0-28.0 | 1.00-3.50 | 3.00-4.00 | 0.04 max | 0.20-1.00, & 6(C+N) min |
Mechanical Properties of ASTM A268/ASME SA268 26-3-3, S44660
| Tensile Strength , MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 585 min | 450 min | 20 min | 265 max |