LongTeng ER308L Stainless Steel Solid MIG Welding Wire

LongTeng ER308L Stainless Steel Solid MIG Welding Wire Overview

LongTeng ER308L is a solid stainless steel welding wire listed by Jiangsu Longteng Special Steel Group under AWS A5.9 ER308L. The L designation stands for low carbon, and the datasheet shows a typical carbon level of 0.023 percent, which is the feature that protects a weld from chromium carbide precipitation and the intergranular corrosion that can follow. The manufacturer names petrochemical plant, pressure vessels, food processing machinery, medical equipment and chemical fertilizer equipment as typical uses, which are all areas where 304 and 304L austenitic stainless steel is widely specified.

Seven Star LLC supplies LongTeng welding consumables from Muscat to customers in Oman and the GCC. This page lists the chemistry and operating information printed for LongTeng ER308L in the manufacturer catalogue and explains how to use it. It also tells you what is missing on purpose: the catalogue page that carries this grade prints a row of mechanical values that does not belong to a stainless wire, so we do not reproduce it. Mechanical test results for any consignment should be taken from the batch test certificate.

Why a 308L Filler Is So Common

Type 308L is the matching filler for the 18Cr-8Ni family of austenitic stainless steels. It deposits weld metal with a mostly austenitic structure and a small amount of ferrite, which helps the weld resist hot cracking while it solidifies. As general class information, the ferrite content is controlled by the balance of chromium and nickel, and the catalogue figures for LongTeng ER308L show chromium at 20.12 percent and nickel at 10.35 percent, a ratio typical for this class.

Because the carbon level is low, LongTeng ER308L suits as-welded service in many corrosive environments without a post-weld solution anneal. It is not a substitute for a stabilised grade at sustained high temperature, nor for a molybdenum-bearing wire where pitting resistance is the main concern; for the latter purpose, see the companion LongTeng ER316L page. Dissimilar joints between stainless and carbon steel normally call for a higher alloy filler such as 309L, so check the welding procedure before you choose.

Printed Chemistry

The catalogue provides one typical analysis for LongTeng ER308L, not ranges. Carbon is 0.023 percent, manganese 1.63, silicon 0.40, chromium 20.12, nickel 10.35, molybdenum 0.37, phosphorus 0.013, sulphur 0.009 and copper 0.16 percent. Low phosphorus and sulphur reduce the risk of solidification cracking, and the low residual molybdenum and copper indicate a clean, controlled melt. These are typical values listed by the manufacturer and not a guaranteed range, so a project that requires verified composition should call for the heat analysis on the test certificate.

Gas, Diameter and Current Reference

For LongTeng ER308L the catalogue lists shielding gas as argon plus 20 percent carbon dioxide with a flow rate of 20 to 25 L/min and direct current electrode positive. Wire diameters shown are 0.8, 1.0 and 1.2 mm, with reference current windows of 70 to 150 A, 100 to 200 A and 140 to 220 A respectively. Please note that stainless welding procedures often use gas mixtures with a lower carbon dioxide share to limit carbon pickup and surface oxidation. Verify the shielding gas against your qualified procedure and the gas supplier’s advice before production.

The manufacturer’s packaging pages describe reference spool formats for gas-shielded wire, among them 1 kg, 5 kg and 15 kg spools in corrugated cardboard. These are reference formats and not stock claims. Ask Seven Star LLC which diameter and package format can be arranged for your order.

Main Benefits at a Glance

The following points summarise what the datasheet and general class knowledge support for LongTeng ER308L.

• It is cited against AWS A5.9 ER308L, the standard bare stainless wire classification for 308L filler.
• Carbon is 0.023 percent in the typical analysis, appropriate for a low-carbon L grade.
• Chromium of 20.12 percent and nickel of 10.35 percent are in the range expected for austenitic 304-type welds.
• Phosphorus of 0.013 percent and sulphur of 0.009 percent are both low.
• Three diameters from 0.8 to 1.2 mm suit thin sheet through medium section fabrication.
• Reference currents between 70 and 220 A fit common MIG power sources.
• The manufacturer lists food processing machinery and medical equipment among its uses, where clean weld surfaces matter.

Where Stainless MIG Wire Is Used in the Region

Austenitic stainless steel, welded with fillers such as LongTeng ER308L, serves in desalination and water treatment skids, food and beverage lines, pharmaceutical utilities, chemical dosing systems and process piping across Oman and the GCC. The manufacturer lists petrochemical, pressure vessel, food machinery, medical equipment and fertilizer uses for LongTeng ER308L. Fabricators in Muscat, Sohar and Salalah industrial areas working on tanks, ducting, hoppers and frames in 304L can use a matching MIG filler to keep production fast, particularly on sheet and light plate.

Good welding with LongTeng ER308L depends on cleanliness: use dedicated brushes and grinding discs, avoid contamination from carbon steel dust, and back-purge pipe when required. Equipment such as the Lincoln Electric Power Wave S500 or the ESAB Rebel EMP 285ic can run solid stainless wire, and quality teams can verify finished welds with instruments in our range, for example the Phase II PHT-3500 portable hardness tester where a hardness check is part of the plan.

Technical Specifications

The table reproduces the chemistry, gas and operating figures printed for LongTeng ER308L. Mechanical values are intentionally omitted; they are provided in the test certificate of the delivered batch. The datasheet extract is attached for reference.

Handling Guidance

Store LongTeng ER308L spools in their sealed packaging in a dry place, and keep them separate from carbon steel consumables to avoid iron contamination. Wear clean gloves when loading the feeder, replace liners with ones suited to stainless wire, and keep tips free of spatter. A rusty or dirty wire surface causes porosity and discolouration that no gas setting can fix.

How to Order

For a quotation on LongTeng ER308L, send Seven Star LLC your wire diameter, quantity and delivery point in Oman or the GCC. We will confirm the package format, provide the datasheet extract and recommend that you request the test certificate with the mechanical results when you place the order. Our Muscat team can also advise on shielding gas, equipment and inspection tools.