LongTeng EH14 High-Manganese Submerged Arc Welding Wire

Why Buyers Look at LongTeng EH14

LongTeng EH14 is the high-manganese entry in the submerged arc range of the LongTeng catalogue. The conformance line reads AWS A5.17 EH14, the printed diameters are 2.5, 3.2, 4.0 and 5.0 mm, and the application note describes high speed welding and filling welding of steel plate of 490 MPa tensile strength. It is a copper-coated solid wire intended to be used with a granular flux, and the page lists sintered fluxes for it.

Seven Star LLC supplies LongTeng welding consumables to customers in the Sultanate of Oman and the GCC, working from Muscat. Because the grade targets a higher strength level than the other plain carbon wires on the same catalogue pages, we describe it carefully here and keep to the numbers that the manufacturer has printed.

Class Information: What EH14 Signals

As general class information, AWS A5.17 uses H in the second position for a high-manganese wire, and 14 for a nominal carbon content of about 0.14 percent. High manganese helps the weld metal reach higher strength and better toughness without needing alloy additions such as nickel. That is why wires of this kind are matched with plates in the 490 MPa strength class, which is exactly what the catalogue note says. This paragraph explains the naming system and does not add any promise beyond the catalogue.

Flux Pairing for LongTeng EH14

The reference table of the catalogue entry names the sintered flux SJ301, while the application note beside it names the sintered flux SJ101. Both are described by the manufacturer as sintered fluxes. Because the two statements differ, Seven Star LLC confirms the exact flux with the manufacturer before issuing a quotation for LongTeng EH14, and we suggest that a buyer qualify the wire and flux together on the actual plate. The pairing matters, because the flux decides how much alloy is transferred, how the bead wets out and how easily the slag detaches.

Mechanical Properties Listed

The printed tensile strength range is 490 to 650 MPa, with a minimum yield strength of 400 MPa and minimum elongation of 22 percent. Impact energy is listed as a minimum of 27 J, with test temperatures of minus 20 and minus 40 degrees Celsius shown on the page. These are typical values listed by the manufacturer; the catalogue does not say which temperature belongs to which sample, so the batch test certificate is the document to read when toughness is part of the specification.

Chemistry as printed includes carbon at 0.066 percent, silicon at 0.011 percent, sulphur at 0.011 percent, phosphorus at 0.011 percent, nickel at 0.007 percent, chromium at 0.013 percent and copper at 0.12 percent. The manganese figure is not repeated here; ask for the test certificate to see the full analysis for the lot you will receive.

Using LongTeng EH14 in the Workshop

Submerged arc welding is chosen when deposition rate and bead quality matter more than positional freedom. The arc runs under flux, so there is little visible arc light and almost no spatter, and operators can run heavy current on thick sections. For LongTeng EH14, thicker diameters such as 4.0 and 5.0 mm are the natural choice on heavy groove fills, while 2.5 and 3.2 mm give more control on thinner plate or where penetration must be limited. The catalogue prints no current or voltage window for this grade, so every parameter must come from a qualified welding procedure.

• Keep the sintered flux dry and redry it as the flux maker instructs.
• Control interpass temperature on thick, high-strength plate.
• Use a clean contact tip and a consistent stick-out to keep the arc stable.
• Record batch numbers of wire and flux against each weld for traceability.

Heat input deserves particular attention with higher-strength deposits. Very high heat input slows cooling, coarsens the grain structure and can lower toughness, while very low heat input on thick plate can leave the joint hard and crack-sensitive. A procedure qualification test with the chosen diameter, flux and plate is the only reliable way to find the window that satisfies both the strength and impact requirements of the job.

Typical Fabrication Contexts in Oman

Higher-strength plate allows thinner sections and lighter structures, which is attractive for crane girders, heavy equipment frames, offshore support steel and pressure parts built near Sohar and Duqm. A wire in the EH14 class is one of the options considered when strength demands go beyond the plain structural level. The impact minimum in the listing also makes the grade relevant where cold-weather or sub-zero handling toughness is specified by the project.

Seven Star LLC does not replace your procedure qualification. What we do is source LongTeng wire, pass along the catalogue extract, forward your technical questions to the manufacturer and help you request the test certificate that your inspector will want to see attached to the LongTeng EH14 order. Where a project compares several candidate wires, we can send the neighbouring catalogue entries for side-by-side review.

Data Table for LongTeng EH14

The figures below are typical values listed by the manufacturer for LongTeng EH14.

Reference Packages

The catalogue’s package pages describe submerged arc coil wire in weights of 25, 50, 100, 250 and 350 kg and drums holding 150, 250 or 350 kg. These are reference packages from the manufacturer and do not describe what we hold at any time. Please state the pack you need when requesting LongTeng EH14.

Related Items

Teams that weld heavy sections also look at equipment and cabling. See the Lincoln Electric Power Wave S500, the ESAB Rebel EMP 285ic and the Lapp OLFLEX Classic 110 flexible control cable, or open the submerged arc welding wire category.

Call To Action

Send the diameter, quantity, plate grade and flux preference for LongTeng EH14 to Seven Star LLC in Muscat. Download the datasheet extract, review the printed values and request the manufacturer’s test certificate with your order.