ASME SFA 5.28
WT 70S-B2L is similar to WT 80S-B2 except it contains a lower carbon content, which gives it an increased resistance to cracking. It is creep resistant and are often used in chemical industries. Preheat and interpass temperatures are usually kept between 275-325°F. WT 70S-B2L is best suited for welds to be left in the as-welded condition or when accuracy of the PWHT is questionable.
Tensile Strength: 75, 000 psi min.
Yield Strength: 58,000 psi min
Elongation: 19% min.
Available in multiple sizes and diameters.
Chemical Composition (Wt%):
Si Mn S P C Cu Cr Mo Ni Other
0.40-0.70 0.40-0.70 0.025 0.025 0.05 0.35 1.2-1.5 0.40-0.65 0.2 0.5