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AWS A 5.20 E71T-1 Flux Cored Welding Wire

1. AWS A5.20 E71T-1 is a classification of flux-cored welding wire. 
2. "E"indicates electrode,"7" - minimum tensile strength 70,000psi (or71ksi).
3. "1" after the "7" means can be used for welding in all positions.
4. The "T" denotes that it is a tubular wire, specifically a flux-cored one.
5. The final "1" indicates its usability characteristics,(DCEP) polarity.
6. This wire is for welding mild steel and 490 MPa (or 71,000 psi) class steels.
7. Requires a CO2 gas shield, (E71T-1M) can use an argon/CO2 mixed gas.
  • E71T-1

  • 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

  • Welding Wire Catalogue-giant weld.pdf

Availability:
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Product Description

| AWS A 5.20 E71T-1 Flux Cored Welding Wire Description


1)Classification Overview: AWS A5.20 E71T-1 is a widely recognized American Welding Society (AWS) classification for a specific type of gas-shielded flux-cored arc welding (FCAW) wire.

2)Meaning of the Designation: The "E" signifies an electrode; "7" denotes a minimum tensile strength of 70 ksi (70,000 psi) in the as-welded condition; "1" indicates that it is suitable for welding in all positions (flat, horizontal, vertical, and overhead); and "T" identifies it as a tubular, flux-cored electrode. The final "1" relates to its operational characteristics, often implying a rutile-based slag system and use with DC electrode positive (DCEP) polarity.


3)Core Composition and Shielding Gas: This wire contains a fluxing agent within its tubular steel sheath, which produces slag and generates shielding gases during welding. E71T-1 electrodes are typically designed for use with a 100% CO2 external shielding gas, though some variations (E71T-1M) can also be classified for use with argon/CO2 mixed gases, which may offer improved usability and mechanical properties.


4)Welding Performance Characteristics: E71T-1 is known for its excellent welding performance, characterized by a smooth and stable arc, low spatter, and a flat to slightly convex bead appearance. The slag produced is generally easy to remove, contributing to good post-weld cleanup. It also offers high deposition rates, which can increase welding efficiency.


5)Mechanical Properties: The deposited weld metal typically exhibits good mechanical properties, including a minimum tensile strength of 70,000 psi and good impact toughness, often at low temperatures (e.g., 20 ft-lbs at 0°F or -18°C, or better at -20°C). It generally has low diffusible hydrogen content, which helps in preventing hydrogen-induced cracking.


6)Typical Applications: Due to its all-position capability and favorable mechanical properties, E71T-1 is extensively used for welding mild steel and 490 MPa (or 71,000 psi) class high-strength steels. Common applications include shipbuilding, structural steel fabrication, pressure vessels, general construction, and heavy equipment manufacturing.


| AWS A 5.20 E71T-1 Flux Cored Welding Wire Down Load


AWS A 5.20 E71T-1 Flux Cored Welding Wire.pdf



| AWS A 5.20 E71T-1 Flux Cored Welding Wire Data Sheet

Standard

AWS A5.20

E71T-1

Chemical Composition %


C

Mn

Si

P

S

Cr

Ni

Cu

Mo

V

Grade

E71T-1/E71T-1C

0.12

1.75

0.90

0.03

0.03

0.20

0.50

0.35

0.30

0.08

Type

Spool  ( MIG )

Specification

 ( MM )

0.80.91.01.21.62.0

Package

S100/1kg  S200/5kg   S270,S300/15kg-20kg

X - ray detection requirements

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

DiameterMM

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 E71T-1 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 A 5.20 E71T-1 Flux Cored Welding Wire Workshop Show

AWS A 5.20 E71T-1 Flux Cored Welding Wire


| AWS A 5.20 E71T-1 Flux Cored Welding Wire Production Video



| AWS A 5.20 E71T-1 Flux Cored Welding Wire Application

AWS A 5.20 E71T-1 Flux Cored Welding Wire



| AWS A 5.20 E71T-1 Flux Cored Welding Wire Certificate

AWS A 5.20 E71T-1 Flux Cored Welding Wire



| AWS A 5.20 E71T-1 Flux Cored Welding Wire Comment & FAQ


Q1: What exactly is AWS A5.20 E71T-1 flux-cored welding wire?

AWS A5.20 E71T-1 is a specific classification for a gas-shielded **flux-cored arc welding (FCAW)** electrode. The "E" denotes an electrode, "7" indicates a minimum tensile strength of 70,000 psi, the first "1" means it's suitable for all-position welding (flat, horizontal, vertical, overhead), and "T" signifies it's a tubular or flux-cored wire. The final "1" indicates specific usability characteristics, typically involving a rutile-based slag system and **DC electrode positive (DCEP)** polarity. This **welding consumable** is designed for high-productivity welding on mild and medium-strength steels.


Q2: What are the primary applications for E71T-1 flux-cored wire?

**E71T-1 flux-cored wire** is widely used in various heavy fabrication and construction sectors due to its versatility and excellent mechanical properties. Common applications include **structural steel fabrication**, shipbuilding, bridge construction, heavy equipment manufacturing, and the production of pressure vessels. Its all-position capability makes it ideal for complex joints and field work.


Q3: What shielding gas is typically required for E71T-1?

For standard **AWS A5.20 E71T-1**, 100% **CO2 shielding gas** is most commonly used. The CO2 gas provides a stable arc and good penetration, which are crucial for achieving sound welds. However, some variations, like E71T-1M, are formulated to perform optimally with an argon/CO2 gas mixture, offering improved arc stability and reduced spatter.


Q4: What are the key advantages of using E71T-1 over solid wire electrodes?

**E71T-1 flux-cored wire** offers several advantages over solid wire, particularly for out-of-position welding and heavy section applications. It provides higher deposition rates, which can significantly increase productivity. The presence of flux within the wire offers better puddle control, excellent penetration, and improved weld bead shape, especially in vertical-up and overhead positions. It also has a greater tolerance for mill scale and surface contaminants compared to solid wires, making **E71T-1** a robust choice for various shop and field conditions.


Q5: What are the typical mechanical properties of weld metal deposited by E71T-1?

Weld metal deposited with **E71T-1** typically exhibits a minimum tensile strength of 70,000 psi (490 MPa) and a minimum yield strength of 58,000 psi (400 MPa). It also demonstrates good ductility with a minimum elongation of 22%. Furthermore, it provides excellent toughness, often meeting or exceeding 20 ft-lbs (27 J) at 0°F (-18°C), making it suitable for applications requiring good impact resistance. These properties ensure the integrity and longevity of the welded structure.


Q6: How does the slag system of E71T-1 affect welding?

**E71T-1** typically features a rutile-based slag system, which contributes to its excellent arc stability and smooth bead appearance. The slag forms a protective cover over the weld pool, shielding it from atmospheric contamination and helping to shape the bead. After welding, the slag is generally easily removable, reducing cleanup time and effort. This easy slag removal is a key benefit for improving **welding efficiency**.


Q7: Can E71T-1 be used for single-pass and multi-pass welding?

Yes, **E71T-1 flux-cored wire** is highly versatile and can be used effectively for both single-pass and multi-pass welding applications. Its robust mechanical properties and excellent arc characteristics make it suitable for a wide range of joint designs and thicknesses. For multi-pass welds, proper interpass cleaning is important to ensure good fusion and prevent defects.


Q8: What are the recommended welding parameters for E71T-1?

Recommended **welding parameters** for E71T-1 vary depending on the wire diameter, welding position, and material thickness. However, general guidelines include using DC electrode positive (DCEP) polarity, maintaining appropriate voltage and wire feed speed settings, and ensuring optimal stickout. It's crucial to consult the manufacturer's specific recommendations for precise parameter settings to achieve the best **weld quality** and penetration.


Q9: Is E71T-1 suitable for welding thin materials?

While **E71T-1** is primarily known for its strength in heavier sections, it can be used on thinner materials with careful parameter control. However, for very thin gauge materials, other **welding processes** or different wire classifications might be more suitable to minimize burn-through and distortion. Proper setup and technique are essential for successful thin material welding with E71T-1.


Q10: What is the significance of the "T" in E71T-1?

The "T" in **E71T-1** specifically indicates that it is a **tubular electrode**, meaning it's a flux-cored wire, not a solid wire. This tubular design allows for the inclusion of fluxing agents, deoxidizers, and alloying elements within the wire, which contribute to its superior arc characteristics, mechanical properties, and deposition rates compared to solid wires. It's a key identifier for this type of **FCAW electrode**.


Q11: How does E71T-1 compare to E7018 stick electrodes?

While both **E71T-1** and **E7018 stick electrodes** are common for structural steel, they differ significantly in application and efficiency. E71T-1 offers much higher deposition rates and greater productivity due to its continuous wire feed, making it preferred for high-volume fabrication. E7018, an SMAW (stick) electrode, requires frequent rod changes but is known for excellent out-of-position control and superior hydrogen control, often used for critical applications where a very low hydrogen weld is paramount.


Q12: What should be considered regarding storage and handling of E71T-1 wire?

Proper storage and handling are crucial for maintaining the quality of **E71T-1 flux-cored wire**. The wire should be stored in a dry environment to prevent moisture absorption, which can lead to porosity and hydrogen-induced cracking in the weld. Keep the wire in its original packaging until ready for use, and avoid exposing it to extreme temperature fluctuations or direct sunlight. Good storage practices ensure optimal **welding performance** and longevity of the product.


Q13: Does E71T-1 produce a lot of spatter?

Compared to some other **welding processes**, **E71T-1 flux-cored wire** generally produces a relatively low amount of spatter, especially when proper welding parameters are used. The fluxing agents help to stabilize the arc and smooth the metal transfer, contributing to cleaner welds. Minimizing spatter reduces post-weld cleanup time, enhancing overall **welding efficiency**.


Q14: What safety precautions should be taken when using E71T-1?

Standard **welding safety precautions** apply when using **E71T-1**. This includes wearing appropriate personal protective equipment (PPE) such as a welding helmet with proper shade, gloves, and protective clothing. Ensure adequate ventilation to remove welding fumes. Be aware of electrical hazards and fire risks. Always follow manufacturer guidelines and general welding safety practices.


Q15: Can E71T-1 be used for repair welding?

Yes, **E71T-1** is often a suitable choice for **repair welding** due to its versatility, good mechanical properties, and ability to handle various joint configurations. Its all-position capability is particularly beneficial for repairs in difficult-to-access areas. Proper surface preparation and consideration of the base metal's properties are essential for successful repair applications.


Q16: Are there different versions or sub-classifications of E71T-1?

Yes, while E71T-1 is the primary classification, there are sub-classifications and variations. For example, **E71T-1M** is a common variant designed for use with mixed shielding gases (e.g., argon/CO2) and often offers better arc characteristics and reduced spatter. Other sub-classifications might denote specific impact toughness requirements or other performance characteristics. Always check the full AWS classification for specific details.


Q17: What is the typical deposition efficiency of E71T-1?

**E71T-1 flux-cored wires** generally boast high deposition efficiencies, often in the range of 80% to 85% or higher. This high efficiency means a larger percentage of the consumed wire contributes to the actual weld metal, leading to less waste and increased productivity. This is a significant advantage for high-production **fabrication processes**.


Q18: How does wire diameter affect the welding process with E71T-1?

The **wire diameter** chosen for **E71T-1** directly impacts the welding current range, deposition rate, and suitability for different material thicknesses and positions. Larger diameters (e.g., 1/16" or 5/64") are typically used for high-current, flat, and horizontal position welding on thicker materials, offering higher deposition rates. Smaller diameters (e.g., .045" or .052") provide better control for out-of-position welding and thinner materials.


Q19: Can E71T-1 be used without external shielding gas?

No, standard **AWS A5.20 E71T-1** is a **gas-shielded flux-cored wire** and requires an external shielding gas, typically 100% CO2, for proper operation and to achieve the specified mechanical properties. Without external gas, the weld will be porous and lack strength. For applications without external gas, a **self-shielded flux-cored wire** (like E71T-GS or E71T-11) would be required, which has a different AWS classification.


Q20: What are some common troubleshooting tips for E71T-1 welding?

Common troubleshooting issues with **E71T-1 welding** often relate to porosity, lack of fusion, or excessive spatter. For porosity, check gas flow, ensure proper gas coverage, and inspect for contaminated base metal or a kinked gas hose. Lack of fusion might indicate insufficient heat input (low voltage or wire feed speed) or improper joint preparation. Excessive spatter could be due to incorrect voltage, stickout, or a dirty contact tip. Always refer to the wire manufacturer's guide and ensure proper equipment calibration for optimal results and **weld quality control**.


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