ThePipingMart Blog Welding Electrodes AWS Class E309LT1-1/T1-4 Flux Core Wire – Composition, Properties, and Uses

AWS Class E309LT1-1/T1-4 Flux Core Wire – Composition, Properties, and Uses

AWS Class E309LT1-1/T1-4 Flux Core

When it comes to welding, knowing the right kind of electrode or wire to use can make a huge difference in the quality of the welded joint. One such wire that is widely used is the AWS Class E309LT1-1/T1-4 Flux Core. This blog dives deeper into what this wire is made of, its physical and mechanical properties, uses, heat treatment requirements, and corrosion resistance.

What is AWS Class E309LT1-1/T1-4 Flux Core?

AWS Class E309LT1-1/T1-4 Flux Core is a structural welding wire used to perform welding operations on stainless steel. It is composed of an all-position flux cored wire that contains 19-21% chromium and 9-11% nickel for improved corrosion resistance and toughness at elevated temperatures up to 400°C (752°F). This class offers enhanced deposition rate, tensile strength values, and uniformity in weld metal composition comparable to solid wires. Its excellent bead shape, penetration, ease of use, filler metal efficiency and good mechanical properties make it widely used in constructing power plants, petrochemical plants, refineries or any other demanding applications requiring superior corrosion resistance.

E309LT1-1/T1-4 Flux Core Welding Wire Composition

This flux-core wire comprises a mix of metals – namely, nickel, chromium, and iron. The composition of the wire can vary slightly depending on the manufacturer, but the base metals and flux used will usually be within a certain range of percentages. The wire is compatible with direct current coated electrode negative (DCEN) polarity.

C Cr Ni Mo Mn Si P S Cu
0.04 22.0-25.0 12.0-14.0 0.75 0.5-2.5 1.0 0.04 0.03 0.75

E309LT1-1/T1-4 Flux Core Coated Wire Physical Properties

The AWS Class E309LT1-1/T1-4 Flux Core wire has a diameter range of 0.9mm to 1.2mm. It has a bright appearance and is designed for use with argon-rich gases. It should also be stored clean and dry to prevent contamination.

E309LT1-1/T1-4 Flux Core Welding Wire Mechanical Properties

This filler wire is flexible and can be used for single and multi-pass welding electrode. It has good resistance to cracking, and its all-position welding capabilities make it a popular choice in the welding industry. The impact toughness is high and can be used to make welds with a good surface finish.

Tensile Strength, kpsi: 75 min
Yield Strength, kpsi: *NS
Elongation %: 30 min

E309LT1-1/T1-4 Flux Core Coated Wire Trade Name

Class UNS Oxford Alloys BOHLER UTP
E309LT1-1/T1-4 W30835 Alloy 309LT1-1/4 BOHLER E309LH PW FD UTP AF 6824 LCPW

E309LT1-1/T1-4 Flux Core Welding Wire Parameters

Diameter Process Volt Amps Shielding Gas
in (mm)
 .035  (.9) GMAW   26-27 150-165 100%CO2
 .045  (1.14) GMAW  26-28 160-200 100%CO2
 .063  (1.6) GMAW  27-28 215-250 100%CO2

E309LT1-1/T1-4 Flux Core Coated Wire Uses

The AWS Class E309LT1-1/T1-4 Flux Core wire is usually used to join stainless and dissimilar steels, as it has a low carbon level, allowing for minimal base metal dilution. It is also useful for welding alloys in vertical or overhead positions where porosity can be problematic.

E309LT1-1/T1-4 Flux Core Welding Wire Heat Treatment

This flux-core wire can be used for single and multi-pass welding without pre- or post-weld heat treatment. However, in certain cases, heat treatment may be necessary. As with any welding, properly drying and storing the wire is important for optimal results.

E309LT1-1/T1-4 Flux Core Coated Wire Corrosion Resistance

One of the key benefits of using AWS Class E309LT1-1/T1-4 Flux Core wire is its corrosion resistance. With its high chromium and nickel content, it is ideal for use in environments where corrosive substances may be present. It is also useful when the weld is subject to high temperatures, as it retains its corrosion resistance even in these conditions.

Conclusion

The AWS Class E309LT1-1/T1-4 Flux Core wire is a versatile and reliable welding wire widely used to join stainless and dissimilar steels. Its nickel, chromium, and iron composition gives it high corrosion resistance, while its physical and mechanical properties make it a popular choice for all-position welding. Its heat treatment requirement is minimal, and it can be stored in a clean, dry environment without any issues. Whether you’re a professional welder or a hobbyist, the AWS Class E309LT1-1/T1-4 Flux Core wire is worth considering for your next project.

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