AWS A 5.10 ER4047 Aluminium Alloy Welding Wire

| AWS A 5.10 ER4047 Aluminium Alloy Welding Wire Description

1）Composition and Primary Feature: AWS A5.10 ER4047 Aluminum Alloy Welding Wire is an aluminum-silicon filler metal containing a high silicon content, typically ranging from 11% to 13%. This elevated silicon level is its distinguishing characteristic, providing exceptionally high fluidity to the molten weld pool.

2）Fluidity and Crack Resistance: The high silicon content results in a very narrow freezing range and excellent wetting action, allowing the filler metal to flow exceptionally well into the joint. This property significantly minimizes weld shrinkage stress and drastically reduces the tendency for hot cracking, which is a major advantage for sensitive aluminum alloys.

3）Historical Development and Application Versatility: Originally developed as a brazing alloy (often designated BAlSi-4 or 718), ER4047's superior flow characteristics and crack resistance quickly led to its widespread adoption as a welding filler metal. It is now commonly used in both Gas Metal Arc Welding (GMAW/MIG) and Gas Tungsten Arc Welding (GTAW/TIG) processes.

4）Recommended Base Metals: ER4047 is particularly recommended for welding various aluminum alloys, including the 1xxx, 3xxx, and 6xxx series (such as 1060, 1350, 3003, and 6061). It is especially well-suited for joining or repairing cast aluminum components, which often have high silicon content or are prone to cracking.

5）Post-Anodizing Appearance: Similar to ER4043 but more pronounced due to the higher silicon content, welds made with ER4047 will typically appear a dark gray to almost black color after anodizing. This aesthetic consideration is important for applications where a consistent finish is desired.

6）Additional Benefits and Considerations: Beyond its crack resistance and fluidity, ER4047 offers good corrosion resistance and excellent thermal conductivity, making it suitable for applications like heat exchangers. While it provides good mechanical strength, its ductility is generally lower than that of ER4043, which is a factor to consider for applications requiring significant post-weld forming.

| AWS A 5.10 ER4047 Aluminium Alloy Welding Wire Down Load

AWS A 5.10 ER4047 aluminium alloy welding wire.pdf

| AWS A 5.10 ER4047 Aluminium Alloy Welding Wire Data Sheet

| AWS A 5.10 ER4047 Aluminium Alloy Welding Wire Workshop Show

| AWS A 5.10 ER4047 Aluminium Alloy Welding Wire Production Video

| AWS A 5.10 ER4047 Aluminium Alloy Welding Wire Application

| AWS A 5.10 ER4047 Aluminium Alloy Welding Wire Certificate

| AWS A 5.10 ER4047 Aluminium Alloy Welding Wire Comment & FAQ

What distinguishes ER4047 aluminum alloy welding wire from other aluminum filler metals?

ER4047 is an **aluminum-silicon filler metal** characterized by a significantly higher silicon content, typically ranging from 11% to 13%. This elevated silicon percentage is its defining feature, setting it apart from ER4043 (which has ~5% silicon) and magnesium-rich alloys like ER5356. This unique composition provides superior fluidity and a very narrow freezing range, making it highly effective for specific **aluminum welding** challenges.

How does the high silicon content in ER4047 benefit the welding process?

The high silicon content in **ER4047** dramatically improves the flow characteristics and wetting action of the molten weld pool. This enhanced fluidity allows the filler metal to penetrate intricate joint designs and effectively fill gaps. Critically, it also minimizes weld shrinkage stresses, significantly reducing the propensity for **hot cracking**, a common and problematic defect in **aluminum alloys**. This makes it an excellent choice for welding crack-sensitive materials or complex geometries.

What are the primary applications for AWS A5.10 ER4047 welding wire?

ER4047 is highly versatile and finds its primary applications where superior fluidity and crack resistance are paramount. It's extensively used in the automotive industry for components like heat exchangers, engine blocks, and thin-gauge aluminum parts. It's also ideal for joining or repairing aluminum castings, often found in machinery and structural applications. Furthermore, its excellent thermal conductivity makes it valuable in heat dissipation systems and **HVAC components**.

Is ER4047 suitable for welding 6061 aluminum alloy?

Yes, **ER4047** is indeed suitable for welding **6061 aluminum alloy**, especially when concerns about hot cracking are present. While ER4043 is also a common choice for 6061, ER4047's higher silicon content offers even greater resistance to cracking, making it a preferred option for constrained joints or thicker sections of **6061 aluminum**. The resulting weld will, however, be non-heat-treatable and will appear dark after anodizing.

Can ER4047 be used for both MIG and TIG welding processes?

Absolutely. **AWS A5.10 ER4047** is designed for use with both Gas Metal Arc Welding (GMAW or MIG) and Gas Tungsten Arc Welding (GTAW or TIG) processes. For optimal performance, always ensure you use 100% Argon or an Argon/Helium mixture as your **shielding gas** to protect the weld pool from atmospheric contamination. Proper **welding parameters** and technique are crucial to harness its excellent flow properties effectively.

What kind of joint preparation is recommended when using ER4047?

Thorough joint preparation is critical when welding with **ER4047**. The base material must be meticulously cleaned to remove all oils, grease, dirt, paint, and especially oxides. Use a dedicated stainless steel wire brush or chemical methods for cleaning. Proper beveling and fit-up are also important to allow the highly fluid filler metal to penetrate effectively and ensure a strong, defect-free **aluminum weld joint**.

What are the post-weld finishing characteristics of welds made with ER4047?

A key characteristic of **ER4047 welds** concerning post-weld finishing is their appearance after anodizing. Due to the high silicon content, the weld area will typically turn a dark gray to almost black color after the anodizing process. This contrasts with the lighter appearance of the surrounding aluminum. This is a significant aesthetic consideration for products where a uniform visual finish is desired, and might necessitate grinding or painting if the dark color is unacceptable.

How does ER4047 compare to ER4043 regarding post-anodizing appearance?

Both ER4047 and ER4043 welds will appear dark after anodizing, but the effect is generally more pronounced with **ER4047** due to its higher silicon content (11-13% vs. 5%). While ER4043 results in a dark gray, ER4047 often yields a deeper gray or almost black color. This difference is important for designers and fabricators who prioritize the final aesthetic of their **aluminum components**.

Does ER4047 offer good corrosion resistance?

Yes, **ER4047** generally provides good corrosion resistance, particularly against atmospheric conditions. The silicon in the alloy helps form a stable oxide layer, contributing to its protective qualities. However, for applications in highly aggressive corrosive environments, especially those involving saltwater or strong alkaline solutions, it's always prudent to conduct specific testing or consider alternative **aluminum filler alloys** if maximum corrosion resistance is the sole priority.

Is ER4047 suitable for marine applications?

While **ER4047** offers good general corrosion resistance, for severe marine environments, especially those involving continuous saltwater exposure, **magnesium-containing aluminum filler metals** like ER5356 are often preferred due to their superior resistance to salt water corrosion. ER4047 can be used in some marine components where its crack resistance is crucial, but its suitability should be assessed based on the specific service conditions and exposure levels.

What are the typical mechanical properties of a weld made with ER4047?

Welds created with **ER4047** typically exhibit moderate mechanical strength and hardness. While its primary benefit lies in its fluidity and crack resistance, the weld deposit generally provides sufficient strength for many applications. However, it will not achieve the high strengths of heat-treatable alloys in their T6 condition, nor the ductility of magnesium-rich alloys. The properties will largely depend on the base metal and the overall **welding procedure**. Its as-welded ductility is usually lower than that of ER4043.

Can ER4047 welds be heat-treated?

No, welds made with **ER4047** are generally considered non-heat-treatable for strength purposes. The silicon in the filler metal forms a eutectic structure upon solidification, which does not respond to solution heat treatment or artificial aging in the same way as the heat-treatable aluminum base metals (like the 6000 series). While stress relieving might be performed, it won't significantly alter the mechanical strength of the weld itself.

What specific precautions should be taken when storing ER4047 aluminum welding wire?

Proper storage is absolutely critical for maintaining the integrity and performance of **ER4047 aluminum welding wire**. Always store spools and cut lengths in a dry, cool environment, ideally in sealed, moisture-proof packaging, away from dust, dirt, oils, and chemical fumes. Contamination from moisture or other substances can lead to significant weld defects such as porosity, lack of fusion, and reduced mechanical properties. Protecting your **welding consumables** ensures high-quality outcomes for all your **aluminum fabrication** projects.

How can I prevent porosity when welding with ER4047?

Preventing porosity when welding with **ER4047** (or any aluminum filler metal) hinges on meticulous preparation and proper technique. Ensure the base metal is thoroughly cleaned of all contaminants, especially oxides and moisture. Use a high-purity **shielding gas** (Argon or Argon/Helium mixtures) and maintain adequate gas flow. Check your **welding equipment** for leaks and ensure proper torch angles and travel speed. Pre-heating thicker sections can also help drive off moisture and reduce the risk of porosity.

Are there any safety considerations unique to welding with ER4047?

While general aluminum welding safety protocols apply, there aren't specific safety considerations unique to **ER4047** itself beyond those for other aluminum alloys. Always ensure excellent ventilation to manage welding fumes, wear appropriate personal protective equipment (PPE) including a welding helmet with proper shade, flame-retardant clothing, and gloves. Be mindful of intense UV radiation from the arc and potential burns. Adhering to **AWS safety standards** and manufacturer guidelines is paramount for a safe welding environment.

What kind of fumes are produced when welding with ER4047?

Welding **aluminum alloys** like those using **ER4047** primarily produces aluminum oxide fumes. These fumes should always be managed with adequate ventilation (local exhaust ventilation or general room ventilation) to prevent inhalation. While aluminum fumes are not acutely toxic in the same way as some other metal fumes, prolonged exposure can lead to respiratory irritation. Always prioritize good air quality in your **welding workshop**.

What are the recommended shielding gases for welding with ER4047?

For most applications, 100% Argon is the primary recommended **shielding gas** when welding with **ER4047** using both MIG and TIG processes. Argon provides good arc stability and excellent cleaning action. For thicker sections or when increased heat input and penetration are desired, particularly with MIG welding, an Argon/Helium mixture (e.g., 75% Argon / 25% Helium or 50% Argon / 50% Helium) can be used. Helium increases arc voltage and heat, improving bead profile and reducing porosity. Always ensure the **shielding gas** purity meets the requirements for **aluminum welding consumables**.

How does shielding gas flow rate affect ER4047 welds?

The correct **shielding gas flow rate** is crucial for successful **ER4047 welds**. Too low a flow rate can lead to inadequate shielding, resulting in atmospheric contamination and porosity. Too high a flow rate can cause turbulence, drawing in ambient air and also leading to porosity. The optimal flow rate depends on factors like joint configuration, torch angle, and environmental conditions (e.g., drafts). Typically, ranges are provided by **welding equipment** manufacturers, but trial and error within those ranges often fine-tune the best setting for your specific setup.