G-TECH 90G

Recommended for high-strength low-alloy steels with a minimum yield strength of up to 540MPa, these consumables offer enhanced elevated temperature performance compared to CMn steels. They are employed in fabricating vessels and associated pipework, catering to the demand for exceptional creep rupture strength and ductility, as high as 450°C. Demonstrating good toughness at low temperatures, they are ideal for crafting higher-strength steels intended for stress-relieved conditions. Specifically designed for offshore oil well-head process pipework and fittings, these low-nickel consumables meet NACE MR0175 requirements (<1% Ni & <22 HRC), ensuring resistance to sulphide-induced stress corrosion cracking in sour service, coupled with impressive sub-zero toughness. Additionally, they find utility in repairing medium-strength, low-alloy steel castings, especially in cases where stress relief alone (rather than normalizing and tempering) is applied. The actual preheat and post-weld heat treatment (PWHT) specifications hinge on the base material being welded, typically falling within the range of 100-250°C for preheat/interpass temperatures, with PWHT being a mandatory step in these applications.