... , against effectively air hole, for building of ships, bridges, machinery, and cars, etc. E70T-5 E500T-5 With good mechanics ... expansive hydrogen content, good crack proof, for building of machinery, water, electric and petrochemical equipment, etc. E71T-1E501T-1 For all- ... . E71T-8 E501T-8 Used for welding bridges, oil production platforms, hulls and their stiffening ribs E71T8-K6E501T8-K6Welding of ...