Chemical components

Product Description

E309LT1-1 is a premium ultra-low carbon 22-12 austenitic stainless steel gas-shielded rutile flux-cored wire, fully compliant with AWS A5.22/A5.22M:2020 and GB/T 17853-2018 standards. With carbon content strictly controlled at ≤0.03% to prevent chromium carbide precipitation, it is engineered for all-position welding (flat, horizontal, vertical-up, vertical-down and overhead) using DC reverse polarity (DCEP). It is compatible with both 100% CO₂ and Ar-15-25% CO₂ mixed gas shielding, offering excellent adaptability to different welding equipment and site conditions. Typical deposited metal composition: 22.0-24.0% Cr, 12.0-14.0% Ni, ≤2.0% Mn, ≤1.0% Si, ≤0.03% C, balance Fe.

Features

· Exceptionally stable and soft arc with instant ignition and excellent re-ignition capability, ideal for intermittent welding and tacking operations
· Extremely low spatter generation with fine, easily removable particles, drastically reducing post-weld grinding and cleaning time by up to 40%
· Beautiful weld bead appearance with uniform, fine ripples and excellent wetting characteristics, producing smooth, defect-free surfaces that require minimal finishing
· Self-peeling slag that removes completely even in vertical and overhead positions, leaving no residual slag inclusions
· Outstanding dissimilar metal weldability and excellent crack resistance, minimizing the risk of cold cracking and hot cracking
· Superior high-temperature strength and oxidation resistance, maintaining performance at temperatures up to 650°C (1200°F)
· Consistent mechanical properties: tensile strength 550-650 MPa, yield strength ≥400 MPa, elongation ≥30%, ensuring reliable structural integrity
· High deposition efficiency (up to 85%) and fast travel speed, significantly improving productivity compared to solid wires

Applications

Widely used for welding dissimilar metals and high-temperature stainless steel components in various industries. Typical applications include joining carbon steel/low alloy steel to 304/304L/316L stainless steel, welding stainless steel clad plates and composite steels, repairing cast stainless steel parts, and fabricating high-temperature equipment such as boiler tubes, heat exchangers, furnace components, and incineration systems. It is also suitable for welding 309/309L stainless steel base metals and general structural fabrication requiring high-temperature resistance.