LongTeng E71T-1C Gas-Shielded Flux-Cored Welding Wire

Overview of the LongTeng E71T-1C Flux-Cored Wire

LongTeng E71T-1C is a tubular, gas-shielded flux-cored welding wire that the manufacturer lists under AWS A5.20 as E71T-1C. The wire is made by Jiangsu Longteng Special Steel Group, a steelmaker that draws its own rod and runs the welding-materials business as part of the same industrial chain. A flux-cored wire of this class pairs a mild-steel sheath with a rutile-type flux core, and it is chosen when a fabricator wants high deposition rates, a stable arc and a slag that peels cleanly in structural and pressure-part work. The LongTeng E71T-1C datasheet printed in the manufacturer catalogue gives a tensile strength of 560 MPa, a yield strength of 480 MPa, 29 percent elongation and Charpy impact energies of 77, 95 and 83 J at minus 20 degrees Celsius.

Seven Star LLC supplies LongTeng E71T-1C to fabrication yards, EPC contractors and maintenance workshops in the Sultanate of Oman and across the GCC, with availability enquiries and engineering support handled from Muscat. Because this page quotes only typical values listed by the manufacturer, the actual figures for a delivered lot should always be confirmed against the test certificate that accompanies the wire.

How a Rutile Flux-Cored Wire Like LongTeng E71T-1C Works

In a conventional solid wire the arc is protected only by the shielding gas, so every deoxidizer has to be dissolved into the wire alloy itself. In this wire the sheath carries the basic iron, while the flux inside the tube supplies the arc stabilizers, deoxidizers and slag formers. As the wire melts, the flux produces a molten slag that floats above the weld pool, shapes the bead, supports the metal in out-of-position joints and slows the cooling of the deposit. The shielding gas supplied through the torch protects the arc column, and in this grade the manufacturer lists pure carbon dioxide at a flow rate of 20 to 25 litres per minute.

The classification letters carry general meaning that applies to every wire of the E71T-1C type, and it is general class information rather than a LongTeng guarantee. The E marks an electrode, the 7 indicates a minimum tensile strength class of 70 ksi, the 1 after it indicates suitability for all positions, T marks a tubular wire, the second 1 identifies the rutile usage group, and the final C shows that carbon dioxide is the classified shielding gas. Welders who use it therefore expect a smooth spray-like transfer, light spatter compared with many solid wires on carbon dioxide, and a slag that can be removed with a chipping hammer or a wire brush.

Chemistry and Mechanical Data of LongTeng E71T-1C

The catalogue chemical composition is carbon 0.05 percent, manganese 1.36 percent, silicon 0.41 percent, sulphur 0.008 percent and phosphorus 0.012 percent. Very low carbon with a moderate manganese and silicon level is the usual balance for a rutile wire aimed at general structural steels, and low sulphur and phosphorus help resistance to hot cracking in the weld metal. These are typical values listed by the manufacturer and not guaranteed limits.

The mechanical row of the same table lists 560 MPa tensile strength, 480 MPa yield strength and 29 percent elongation, with impact energy tested at minus 20 degrees Celsius giving 77, 95 and 83 J for three specimens. An engineer reading the LongTeng E71T-1C datasheet can use these numbers for initial screening, then compare them against the project welding procedure specification and request the batch certificate for qualification work.

Key Features of LongTeng E71T-1C

The following points summarise what the manufacturer data shows about this wire and what the class generally offers in the workshop.

• The wire conforms, as listed by the manufacturer, to AWS A5.20 E71T-1C, which is a recognised classification that most project specifications and inspectors know well.
• Listed diameters cover 1.0, 1.2, 1.4 and 1.6 mm, so the same grade can serve thin plate work with the smallest size and heavy sections with the largest.
• Carbon dioxide shielding is the only gas the catalogue lists, which keeps gas supply simple and economical compared with argon mixtures.
• The listed current ranges grow with diameter, from 120 to 250 A for 1.0 mm up to 180 to 450 A for 1.6 mm, all on DC electrode positive.
• The impact data are given at minus 20 degrees Celsius, which is the reference temperature printed for this grade.
• Low listed sulphur at 0.008 percent and phosphorus at 0.012 percent support clean weld metal.
• The manufacturer names shipbuilding, mechanical manufacture, petroleum machinery, chemical machinery and hoisting machinery as typical applications.
• The wire is produced by a group that makes its own steel rod, which gives the chain of supply a single origin from billet to finished spool.

Industrial Applications in Oman and the GCC

The application line printed for LongTeng E71T-1C points to key structures such as ship hulls, mechanical frames, petroleum machinery, chemical machinery and hoisting equipment. In Oman those categories map readily onto the shipyards and repair docks at Duqm and Sohar, the steel fabrication shops that serve refineries and gas processing plants, and the structural contractors who build pipe racks, tank farms and crane runways. Rutile flux-cored wire is also widely used on skid frames, equipment bases and support steelwork where speed in the flat and horizontal positions matters.

Seven Star LLC supports these users from Muscat with datasheet exchange, grade confirmation and enquiry handling for LongTeng E71T-1C. Buyers should ask for the test certificate for the lot, the diameter needed and the quantity, and our team will respond with the supply options. Where a project demands a certificate from a classification society or a specific approval, the buyer should state that requirement in the enquiry so it can be checked against the lot documents before an order is placed, because this page does not claim any approval.

Welding Practice Notes for LongTeng E71T-1C

These notes are general practice for the E71T-1C class and are not warranties from LongTeng. Use direct current with the electrode positive, as the catalogue table indicates, and set the gas flow inside the listed 20 to 25 litres per minute so draughts on a yard site do not strip the shield. Keep the contact tip clean, choose a stick-out that suits the diameter, and run the voltage high enough to keep the arc stable at the chosen wire feed speed. Clean mill scale, oil and moisture from the joint, and respect the preheat and interpass limits in the approved procedure for the base steel. Remove all slag between passes so that a new layer is deposited on clean metal.

Technical Specifications of LongTeng E71T-1C

The table below reproduces the typical values listed by the manufacturer for LongTeng E71T-1C in its catalogue.

Matching Equipment and Inspection

A flux-cored wire only performs as well as the power source that feeds it, so pair it with a capable wire-feed machine such as the Lincoln Electric Power Wave S500 or the multi-process ESAB Rebel EMP 285ic that Seven Star LLC also supplies. After welding, a thermal camera like the FLIR E96 thermal imaging camera can help the inspector check preheat and interpass temperatures on heavy joints.

How to Order

Send Seven Star LLC your required diameter, quantity and delivery location for LongTeng E71T-1C and our instrumentation and industrial supply team in Muscat will reply with availability and lead time. The official catalogue extract is attached to this page as the LongTeng E71T-1C datasheet, so your engineers and inspectors can review the manufacturer values before raising a formal request for quotation for projects in Oman and the GCC. Ask for the test certificate with your enquiry, and mention any inspection or documentation requirement from the first message.