LongTeng ER70S-G Carbon Steel Solid MIG Welding Wire

LongTeng ER70S-G general-purpose G-class wire

LongTeng ER70S-G appears on page 7 of the manufacturer’s catalogue. The ISO conformance printed is 14341-B-GS1, and the datasheet describes it for welding all kinds of 500 MPa structural steel parts and for high-speed welding of 500 MPa steel plate. We do not repeat the AWS line printed on that page, because it shows a different grade name and does not match the title of the entry; the batch test certificate is the reference for classification.

In the AWS system a G suffix means that the composition is not fixed to the standard bands but is agreed between the supplier and the buyer, so the figures on the datasheet and the lot certificate matter more than usual. Seven Star LLC supplies the wire from Muscat for fabricators across Oman and the GCC who want that documentation before ordering.

Composition with titanium and zirconium

The distinguishing line on the datasheet is the chemistry table, which lists a combined titanium plus zirconium figure of 0.16 percent instead of the chromium, nickel, molybdenum and vanadium columns shown for the other grades. General class information: titanium and zirconium are strong deoxidising and nitrogen-binding additions, and they are often used in high-speed wires to keep the weld pool tranquil at high travel speeds.

Carbon at 0.061 percent is the lowest among the plain carbon steel wires on pages 5 to 7, with manganese at 1.44 percent and silicon at 0.73 percent. Low carbon with a solid manganese level tends to give a soft, tough weld deposit, which is consistent with the high impact energies reported on the page.

LongTeng ER70S-G typical values

All numbers below are typical values listed by the manufacturer on the datasheet page.

Typical chemical composition as printed, weight percent:

What stands out

Impact energy of 114, 131 and 127 joules at minus 40 degrees Celsius is the highest set of values among the carbon steel solid wires on these pages, and phosphorus at 0.009 percent is the lowest. Tensile strength of 545 MPa with 455 MPa yield is the same band as the ER70S-6 entries, so the choice between them is more about welding behaviour and documentation than about strength.

Treat all of these as typical values from the manufacturer. For design work, use the certificate for the delivered lot and the results of your own procedure qualification.

Parameters for production welding

For LongTeng ER70S-G the catalogue lists CO₂ as the reference shielding gas. Current is DC electrode positive:

General guidance: for high-speed mechanised welding use the higher end of the current range for the chosen diameter, keep wire stick-out consistent and avoid draughts at the arc. Pure CO₂ gives deep penetration but a livelier arc than mixed gas.

Where it fits

The manufacturer points to 500 MPa structural steel parts and to high-speed plate welding. That makes LongTeng ER70S-G a candidate for repeatable production tasks: steel storage tanks, structural beam assemblies, rolling stock components, container and trailer frames and other long seam welds, subject to the code and procedure that apply to the job.

Shops in Sohar or Salalah that run mechanised carriages or robot cells alongside manual power sources such as the Lincoln Electric Power Wave S500 will see most benefit from the faster travel speeds the grade is described for. Find alternatives in our solid welding wire category.

Packaging and ordering

The manufacturer’s package reference lists GMAW spools to EN ISO 544 in several formats: BS300 (steel, 15 kg), D270 (plastic, 15 kg), D300 (plastic, 15 kg), D200 (plastic, 5 kg) and D100 (plastic, 1 kg), each in corrugated cardboard outer packing. These are the manufacturer’s reference packages, not a statement of what is on our shelves; confirm the spool format and quantity you need when you send the enquiry.

Send Seven Star LLC your diameter, spool format and quantity of LongTeng ER70S-G, along with the specification of the job. We confirm availability in writing. No approval is claimed on this page for this grade, so ask for the test certificate of the lot you will receive.

Notes for high-speed welding

General guidance: high-speed welding magnifies small inconsistencies. Check that the wire feeds smoothly, that the earth return is solid and that the shielding gas coverage is not disturbed by travel speed or by draughts. A slightly longer gas post-flow often helps prevent oxidation at the crater when a fast carriage stops.

Because LongTeng ER70S-G is a G-class wire, record the lot certificate with each production run. If a customer later asks which chemistry produced a given weld, the certificate and the datasheet extract answer that question.

Ordering documents for LongTeng ER70S-G

For LongTeng ER70S-G, ask for the lot test certificate and, if the project needs it, the manufacturer confirmation of the classification, since the printed AWS line is not used on this page. Seven Star LLC can obtain the paperwork that the manufacturer issues for the lot you buy. Please specify the diameter, spool package from the catalogue list, and the quantity, and we reply in writing.

Choosing LongTeng ER70S-G against other grades

LongTeng ER70S-G is the lowest-carbon wire among the carbon steel entries on this group of pages and carries the highest impact numbers printed there, which makes it attractive for long production runs and fast travel. For general structural work without special speed requirements, ER70S-6 remains the more familiar class. When in doubt, qualify LongTeng ER70S-G on a coupon, compare it with the alternatives and keep the lot certificate with the record.

Seven Star LLC works with fabricators, EPC contractors and maintenance teams in Muscat, Sohar and Salalah, and answers enquiries for LongTeng ER70S-G together with matching shielding gas and feeding accessories on request. Questions about the wire, the datasheet extract or your welding procedure can be sent in the same message, and we reply with whatever the manufacturer documents confirm. Delivery to sites elsewhere in the GCC can be discussed once the quantity and diameter are known.

Projects that pair long welded seams with grooved pipe joints, for instance the Victaulic Style 107N QuickVic Rigid Coupling, can include both items in the same enquiry.