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ER4047
0.5kg,1kg,2kg,5kg,7kg,9kg
1lb;2lb;4.5lb;11lb;15lb;20lb
0.8mm;0.9mm;1.0mm;1.2mm;1.6mm;2.0mm
0.023;0.030in;0.035in;3/64″;0.045;1/16″;5/64″
1.6mm,2.0mm,2.4mm,3.2mm,4.0mm,5.0mm
1/16 ″in;5/64″in;3/32″in;1/8″in;5/32″inch
D100,D200,D270,D300,S300,S360
Acceptable (design the pack with your logo)
15 Days
Product Description
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.
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.
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**.
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.
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.
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**.
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.
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**.
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.
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.
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.
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.
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.
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.
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.
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**.
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**.
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.
Pre-heating can be beneficial, especially when welding thicker sections or highly constrained joints with **ER4047**. Pre-heating helps to slow down the cooling rate of the weld, further reducing the risk of hot cracking and improving the flow of the highly fluid filler metal. It also helps to drive off any surface moisture. However, excessive pre-heat should be avoided as it can lead to sag or distortion. Always follow recommended **welding procedures** for the specific base metal thickness.
Insufficient pre-heating when welding with **ER4047** might manifest as increased susceptibility to hot cracking, especially in thicker or constrained parts, or a lack of fluidity and poor tie-in. Conversely, excessive pre-heating can lead to excessive weld sag, burn-through on thinner sections, increased distortion, and potentially a larger heat-affected zone (HAZ) which can degrade base metal properties. Balancing the pre-heat temperature is a critical aspect of **aluminum welding best practices**.
Yes, **ER4047** is often an excellent choice for welding dissimilar aluminum alloys, particularly when one or both of the base metals are prone to hot cracking (e.g., certain 6000 series alloys to themselves or to castings). Its high silicon content effectively dilutes the melting range and minimizes crack sensitivity. However, always verify compatibility and mechanical property requirements for the specific **dissimilar aluminum joint** before proceeding, referring to **AWS A5.10 standards** for guidance.
When using **ER4047** for dissimilar **aluminum alloy welding**, challenges can include differing melting temperatures between the base metals, which requires careful heat input control. Differences in thermal expansion can also lead to distortion. Furthermore, the resulting weld metal will have properties that are a blend of the filler and diluted base metals, which may not always match the desired properties of either parent metal. Proper joint design and **welding technique** are crucial to mitigate these issues.
The narrow freezing range of **ER4047**, a direct consequence of its near-eutectic composition, is a significant advantage in **aluminum welding**. It means the molten metal solidifies rapidly and consistently, reducing the time during which the weld metal is in a mushy or semi-solid state. This rapid solidification significantly minimizes shrinkage stresses, which are the primary cause of **hot cracking** in aluminum welds, particularly in highly constrained joints or when welding crack-sensitive alloys. This property makes it highly reliable for ensuring weld integrity.
While a narrow freezing range in **ER4047** primarily helps reduce hot cracking, it can also indirectly influence weld distortion. By rapidly solidifying, the weld metal experiences less time under stress from solidification shrinkage, potentially leading to less overall distortion compared to filler metals with wider freezing ranges. However, general **aluminum welding practices** such as proper clamping, tacking, and managing heat input are still essential for controlling distortion in **aluminum structures**.
