E71T-8
1kg,5kg,15kg,20kg
1lb;2lb;4.5lb;11lb;15lb;20lb;33lb;44lb
0.6mm;0.8mm;0.9mm;1.0mm;1.2mm;1.6;2.0mm
0.023;0.030in;0.035in;3/64″;0.045;1/16″;5/64″
D100,D200,D270,D300,BS300,K300
Acceptable (design the pack with your logo)
15 Days
Availability: | |
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Product Description
1)AWS A5.20 E71T-8 is a specific classification for a self-shielded, flux-cored arc welding (FCAW-S) wire.
2)The "E" designates an electrode, "7" indicates a minimum tensile strength of 70,000 psi, "1" signifies that it can be used in all welding positions, and "T" denotes a tubular (flux-cored) wire.
3)The "-8" refers to the specific usability characteristics, shielding gas requirements (none in this case, as it's self-shielded), and chemical composition of the deposited weld metal.
4)As a "gasless" wire, E71T-8 contains a flux core that decomposes during welding to generate its own protective gas shield, eliminating the need for an external shielding gas cylinder, regulator, and hoses.
5)This wire is primarily designed for single-pass and multi-pass welding of carbon and certain low-alloy steels, offering good mechanical properties, including excellent low-temperature impact toughness.
6)It is widely utilized in construction, shipbuilding, and general fabrication, particularly for applications where portability, outdoor welding, or the inability to use shielding gas is a concern, and is often specified for welds requiring seismic resistance (e.g., in accordance with AWS D1.8).
AWS A 5.20 E71T-8 Flux Cored Welding Wire.pdf
Standard: AWS A5.20 E71T-8 | Chemical Composition % | |||||||||||||
C | Mn | Si | P | Al | S | Cr | Ni | Cu | Mo | V | ||||
Grade E71T-8 | ≤0.30 | ≤1.75 | ≤0.60 | ≤0.03 | ≤1.80 | ≤0.03 | ≤0.20 | ≤0.50 | ≤0.35 | ≤0.30 | ≤0.08 | |||
Type | Spool ( MIG ) | |||||||||||||
Specification ( MM ) | 0.8、0.9、1.0、1.2、1.6、2.0 | Package | S100/1kg S200/5kg S270,S300/15kg-20kg | |||||||||||
X - ray detection requirements:Ⅱ | Deposited metal diffusible hydrogen (Chromatography or Mercury):≤10ml/100g | |||||||||||||
Mechanical Properties | Yield Strength (Mpa) | Tensile (Mpa) | Elongation (%) | AKV Impact Energy(J) -20℃ | ||||||||||
≥ 390 | 490 ~ 670 | ≥ 22 | ≥ 27 | |||||||||||
MIG Welding
Current - A | Diameter(MM) | 1.0 | 1.2 | 1.4 | 1.6 | |||||||||
Downward welding | 80 – 250 | 120 – 300 | 140 – 400 | 180 – 450 | ||||||||||
Vertical upward welding | 120 – 260 | 150 – 270 | 180 – 280 | |||||||||||
Vertical down welding | 200 – 300 | 220 – 300 | 250 – 300 | |||||||||||
Horizontal welding | 120 – 280 | 150 – 320 | 180 – 350 |
Diameter | Process | ||
in | mm | ||
0.023 | 0.6 | GMAW | |
0.03 | 0.8 | GMAW | |
0.035 | 0.9 | GMAW | |
0.039 | 1.0 | GMAW | |
1/25.4” | |||
0.045 | 1.2 | GMAW | |
3/64” | |||
1/16” | 1.6 | GMAW |
AWS A 5.20 Gasless E71T-8 Flux Cored Welding Wire Packages | |||||||||||
Weight | 0.5kg | 1kg | 2kg | 5kg | 15kg | 20kg | |||||
1 lb | 2 lb | 4 lb | 11 lb | 33 lb | 44 lb |
AWS A5.20 E71T-8 is a specific classification for a **self-shielded, flux-cored arc welding (FCAW-S) wire**. It's designed for **gasless welding** of carbon and certain low-alloy steels, making it highly versatile for various **welding applications**. This **welding consumable** is known for its convenience and robust performance in the field.
The "gasless" designation indicates that E71T-8 wire does not require an external shielding gas. Instead, its tubular flux core generates its own protective gas shield during the welding process. This feature simplifies the **welding setup**, increases portability, and makes it ideal for outdoor or windy conditions where gas shielding would be ineffective.
E71T-8 welding wire is widely used in general fabrication, structural steel construction, shipbuilding, and repair work. It's particularly effective for welding in challenging environments, such as on-site construction or maintenance, where portability and efficiency are crucial. This **welding solution** is a staple for many **fabricators**.
E71T-8 is primarily designed for welding **mild steels** and some low-alloy steels. It provides excellent results on common structural steels like A36, A500, A572, and A992. Always ensure compatibility with the specific **base metal** to achieve optimal **weld integrity**.
The main advantages of E71T-8 include its **gasless operation**, which enhances portability and reduces equipment costs. It offers good deposition rates, excellent penetration, and reliable mechanical properties, including good low-temperature impact toughness. Its ability to perform well in windy conditions makes it a valuable **welding material** for outdoor projects.
Welds created with E71T-8 typically exhibit a minimum tensile strength of 70,000 psi (approximately 480 MPa). They also possess good impact toughness, often meeting specific requirements for seismic applications (e.g., AWS D1.8). These properties ensure the durability and reliability of the **welded joints** in demanding **structural applications**.
E71T-8 flux-cored wire is typically used with **DC Electrode Negative (DCEN)**, also known as straight polarity. This polarity helps to achieve good penetration, a stable arc, and optimal bead profile when performing **FCAW-S**. Always verify the manufacturer's recommendations for specific settings.
Yes, the "1" in E71T-8 signifies that it is an **all-position welding wire**, meaning it can be effectively used for welding in flat, horizontal, vertical, and overhead positions. Its self-shielding nature and consistent arc characteristics contribute to its versatility in various **welding orientations**.
Welds produced with E71T-8 typically have a convex bead shape with a visible slag covering. The slag is usually easy to remove, revealing a clean and consistent weld bead underneath. The overall appearance is robust, indicative of good penetration and fusion in the **welded joint**.
E71T-8 is known for its ability to tolerate some level of mill scale, rust, and paint on the base metal, making it less sensitive to surface contaminants compared to solid wires. However, proper **weld preparation** by cleaning the surface of excessive impurities is always recommended for optimal **weld quality** and to prevent potential defects.
E71T-8 welding wire is commonly available in several diameters to suit different material thicknesses and welding machines. Typical sizes include 0.030" (0.8mm), 0.035" (0.9mm), 0.045" (1.1mm), and 0.052" (1.3mm), as well as larger diameters for heavier fabrication. Selecting the correct **wire diameter** is crucial for proper **welding parameters**.
When using E71T-8, standard welding safety precautions apply, including wearing appropriate personal protective equipment (PPE) such as welding helmets, gloves, and protective clothing. Ensure adequate ventilation as the self-shielding flux produces fumes. Always consult the manufacturer's Safety Data Sheet (SDS) for detailed **safety guidelines**.
Unlike solid wires such as ER70S-6 which require external shielding gas, E71T-8 is self-shielded, offering greater portability and suitability for outdoor conditions. E71T-8 generally provides deeper penetration and tolerates minor surface contaminants better, while ER70S-6 typically produces less spatter and a smoother bead in controlled environments. Both are excellent **welding options** but serve different operational needs.
Yes, E71T-8 is an excellent choice for repair work due to its versatility, ability to weld in all positions, and tolerance to less-than-ideal surface conditions. Its robust mechanical properties ensure strong and durable repairs on a variety of steel structures and components. It's a go-to **repair welding** solution for many professionals.
E71T-8 wire should be stored in a dry, temperate environment to prevent moisture absorption, which can affect its performance and lead to porosity. When stored correctly in its original packaging, the shelf life is typically indefinite. Proper storage ensures the wire maintains its optimal **welding characteristics** and prevents issues like rust or feeding problems.
The slag system of E71T-8 is designed to provide comprehensive shielding and shape the weld bead. It solidifies quickly, helping to support the weld pool in all positions. The resulting slag is generally easy to remove, minimizing the need for extensive post-weld cleaning, which contributes to overall **welding efficiency**.
Yes, E71T-8 is widely approved and used for critical structural applications, particularly those requiring specific seismic performance (e.g., meeting the requirements of AWS D1.8 for seismic structural welding). Its consistent mechanical properties and proven performance in challenging environments make it a reliable choice for **high-strength welds**.
Common issues to avoid when using E71T-8 include excessive spatter (often due to incorrect voltage or wire feed speed), porosity (due to moisture absorption or inadequate stick-out), and lack of fusion. Adhering to manufacturer-recommended **welding parameters** and maintaining proper technique will help mitigate these issues and ensure **quality welds**.
Yes, E71T-8 can be used with standard MIG (GMAW) welding machines that are capable of flux-cored welding. Ensure the machine is set to **DCEN (Direct Current Electrode Negative)** polarity. Most modern MIG welders have the capability to run flux-cored wires, offering versatility in your **welding equipment**.
Detailed specifications, including chemical composition, mechanical properties, and relevant certifications (e.g., ABS, DNV, Lloyd's Register), can be found on the manufacturer's technical data sheets (TDS) or product brochures. These documents are essential for ensuring the wire meets the specific requirements of your **welding project** and **quality standards**.