Chemical components

Product Description

with AWS A5.20 standards, designed for single and multi-pass welding of carbon and low-alloy steels requiring 70 ksi (480 MPa) minimum tensile strength. Featuring a composition with 0.12% maximum carbon, up to 1.75% manganese, and up to 0.90% silicon, it provides excellent weld metal toughness with low diffusible hydrogen content (H4 classification ≤4ml/100g). The "1C" suffix indicates CO₂ shielding gas compatibility, optimized for rutile-based slag system with easy removal and excellent bead appearance. Compatible with DCEP (DC+) polarity, it supports all-position welding including vertical-down.

Features

▪ Rutile Slag System: The titanium dioxide-based flux produces a fast-freezing slag that enables excellent out-of-position welding performance, particularly in vertical-up and overhead positions. Slag removal is easy with clean weld bead appearance.
▪ Superior Mechanical Properties: Delivers tensile strength of 480-660 MPa, yield strength ≥390 MPa, elongation ≥22%, and excellent Charpy V-Notch impact values (≥27J at -20°C). The low hydrogen H4 classification minimizes hydrogen-induced cracking risk.
▪ High Deposition Efficiency: The flux cored design provides deposition rates significantly higher than solid MIG wire, while the rutile slag system ensures smooth arc transfer with minimal spatter and low fume generation for improved operator comfort.
▪ Versatile Gas Compatibility: Classified specifically for 100% CO₂ shielding (E71T-1C), with some formulations also compatible with 75% Ar/25% CO₂ mixtures (E71T-1M). CO₂ provides deeper penetration and higher deposition rates, while Ar/CO₂ mixtures improve impact toughness.
▪ All-Position Capability: Performs effectively in flat, horizontal, vertical-up, vertical-down, and overhead positions. Fast-freezing slag provides excellent puddle control in out-of-position applications.

Applications

▪ Ideal for high-productivity welding requiring excellent mechanical properties and all-position capability, E71T-1C is widely used in:
▪ Shipbuilding & Marine: Hull construction, deck structures, and marine engineering requiring high-strength welds with excellent low-temperature toughness and crack resistance.
▪ Structural Steel Fabrication: Bridges, buildings, heavy steel structures, and construction projects requiring multi-pass welding with X-ray quality welds and consistent mechanical properties.
▪ Pressure Vessels & Tanks: Fabrication of pressure vessels, storage tanks, and boiler components requiring code-quality welds with reliable mechanical properties and low hydrogen content.
▪ Heavy Equipment & Machinery: Construction machinery, mining equipment, and heavy fabrication requiring high deposition rates with excellent weld metal toughness and all-position welding capability.