LongTeng ER100S-G Carbon Steel Solid MIG Welding Wire

LongTeng ER100S-G High-Strength Solid MIG Wire at a Glance

LongTeng ER100S-G is a solid gas-shielded welding wire that the manufacturer, Jiangsu Longteng Special Steel Group, catalogues under AWS A5.28 ER100S-G for 690 MPa class high-strength steel. The catalogue names construction machinery, hoisting machinery, bridges, pipelines, shipbuilding and pressure vessels as its typical fields. For fabricators who work with quenched and tempered plate, this is the next step up from a 620 MPa wire, and the datasheet extract attached to this page gives the chemistry and operating window the producer prints for it.

Seven Star LLC, based in Muscat, supplies LongTeng consumables including LongTeng ER100S-G to workshops, contractors and maintenance teams across Oman and the GCC. This LongTeng ER100S-G page is written as a working reference for welding engineers and buyers: it explains what each printed value means, which values we deliberately leave out because the catalogue does not support them, and how to ask for a batch certificate. Every figure shown is a typical value listed by the manufacturer and is not a Seven Star LLC guarantee.

What the G Suffix Means for This Wire

Under the AWS A5.28 specification, wires with the G suffix are classified by mechanical performance rather than by a fixed chemical composition, so the supplier is free to tune the alloy within agreed limits. That is why the chemistry on the page matters: LongTeng ER100S-G lists carbon at 0.11 percent maximum, manganese at 1.40 to 1.90 percent, silicon at 0.80 percent maximum, chromium at 0.30 percent maximum and nickel at 0.20 to 0.60 percent, with sulphur and phosphorus each held to 0.025 percent maximum. Titanium is capped at 0.16 percent and copper at 0.50 percent. As general class information, nickel supports toughness at low temperature while manganese and chromium contribute hardenability and strength.

A note on the datasheet itself. Our review of the catalogue found that the mechanical property row printed beside this wire is identical to the row printed for the lower strength ER90S-G, and the molybdenum entry appears as a single value instead of the range style used elsewhere. Because those entries look like copy-over from a neighbouring grade, we do not publish them here. Instead, we recommend that you request the batch test certificate for the wire you plan to buy and take tensile, yield, elongation and impact figures from that document.

Arc Behaviour and Shielding

The catalogue gives argon with 20 percent carbon dioxide as the reference shielding gas, used with direct current electrode positive. This mixture is a common choice for structural MIG work because it provides a wide window of stable transfer, good wetting at the toe of the bead and acceptable spatter levels. In practice the arc of LongTeng ER100S-G should be run with a consistent stick-out, a gas flow in the catalogue band, and a shield that is protected from wind, which in open yards near Sohar or Duqm usually means temporary screens around the joint.

High-strength joints, including those made with LongTeng ER100S-G, are sensitive to hydrogen and to rapid cooling. General practice, which should always be confirmed against the plate producer’s guidance, is to keep the joint dry, remove oil and mill scale, apply preheat when the section thickness calls for it, and watch interpass temperature so that the heat-affected zone is not embrittled. The wire alone cannot solve those risks, and LongTeng ER100S-G is no exception, but a clean, dry spool and a stable arc remove one source of variability.

Diameters and Current Reference

Four LongTeng ER100S-G diameters are listed: 0.8, 1.0, 1.2 and 1.6 mm. The reference current for 0.8 mm wire runs from 50 to 100 A, for 1.0 mm from 50 to 220 A, for 1.2 mm from 80 to 350 A and for 1.6 mm from 170 to 550 A, all on DC electrode positive. Gas flow is 15 L/min for 0.8 mm, 15 to 20 for 1.0 mm, 15 to 25 for 1.2 mm and 20 to 25 for 1.6 mm. The manufacturer also publishes reference spool formats for gas-shielded wire, such as 5 kg and 15 kg plastic spools and a 15 kg steel-wire basket spool, as well as small 1 kg spools. Treat these as reference package types rather than stock information, and confirm what can be delivered when you place an enquiry.

Key Benefits of LongTeng ER100S-G

These are the points an engineer can rely on for LongTeng ER100S-G from the printed datasheet and general class knowledge.

• The wire is cited against AWS A5.28 ER100S-G, a class aimed at higher-strength low-alloy structural steels.
• The manufacturer states it is suitable for 690 MPa high strength steel structures.
• A nickel addition of 0.20 to 0.60 percent is part of the printed chemistry.
• Carbon is limited to 0.11 percent maximum, which helps keep weld metal crack resistance under control.
• Sulphur and phosphorus are each held at 0.025 percent maximum for clean weld metal.
• Reference shielding is argon with 20 percent carbon dioxide on DC electrode positive, which suits standard MIG equipment.
• The diameter range from 0.8 to 1.6 mm covers thin gauge repairs through heavy multipass groove welds.
• Published current windows from 50 A to 550 A let one wire family serve different power sources.

Applications in Oman and the Gulf

High-strength steel reduces weight and wall thickness, so it appears wherever lifting and load capacity matter. Hoisting machinery, mobile crane components, bridge girders, heavy trailers and pressure-retaining equipment all fall in the manufacturer’s list for LongTeng ER100S-G. In the region, those uses translate into port equipment at Salalah and Sohar, structural steelwork for industrial zones, and shop repairs for machinery serving oil, gas and utilities customers.

Before ordering LongTeng ER100S-G, define the plate grade, the thickness, the joint design and the inspection regime. Welding power sources must be able to hold a stable arc at the chosen current, and the pair of multi-process machines we list, the Lincoln Electric Power Wave S500 and the ESAB Rebel EMP 285ic, are examples that run solid MIG wire. After welding, hardness verification with an instrument such as the Phase II PHT-3500 portable hardness tester helps confirm that the finished joint sits in the range your procedure expects.

Technical Specifications

The values below come from the manufacturer catalogue entry for LongTeng ER100S-G. Mechanical properties are not tabulated because the catalogue row looks duplicated from another grade; refer to the test certificate. Download the datasheet extract for the original page.

Handling and Storage Advice

Copper-coated solid wire such as LongTeng ER100S-G stays in good condition when it is kept dry. Keep spools in original packaging until use, stack them off the floor and avoid areas where condensation forms. Let spools that have been in a cold or air-conditioned store warm to workshop temperature before opening them, and cover the wire on the feeder during long breaks. Replace contact tips and liners on schedule, because worn consumables cause erratic feeding that looks like a wire problem.

Request a Quotation

To enquire about LongTeng ER100S-G, send Seven Star LLC your wire diameter, quantity, preferred package and delivery location. We will confirm what can be arranged, share the manufacturer datasheet extract and note that the batch certificate should be requested with the order. Our Muscat team can also discuss matching welding equipment, shielding gas and inspection tools for your project in Oman or elsewhere in the GCC.