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AWS A5.9: ER 347Si | EN 12072: W 19 9 Nb Si StarBlaze TIG 347Si is a niobium-stabilised stainless steel TIG welding rod depositing a 19Cr/9Ni weld metal with added silicon for improved weld pool fluidity and appearance. It is suitable for welding 321 and 347 grade stainless steels, especially in pipe, plate, and vessel fabrication. The wire offers excellent corrosion resistance at service temperatures below 400°C and reduces the risk of intergranular corrosion due to niobium stabilisation. Diameter: 1.60 mm, 2.00 mm, 2.40 mm, 3.20 mm, 4.00 mm Pack Sizes: 5 kg/tube, 20 kg/box