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In the intricate world of electronics repair and assembly, the choice of solder is not merely a technical detail—it is the fundamental determinant of connection integrity, long-term reliability, and operational efficiency. For professional electronics service shops, where precision and consistency are non-negotiable, selecting the right soldering material is paramount. Among the array of options available, the High Quality Rosin Flux Core Solder 60 40 stands as a time-tested champion. This specific alloy, with its precise composition of 60% tin (Sn) and 40% lead (Pb), offers an optimal balance of mechanical strength, wettability, and a low melting point, making it an indispensable tool for a vast spectrum of tasks, from delicate surface-mount component replacement to robust through-hole joint formation. This comprehensive guide delves into the specifications, applications, and unparalleled benefits of our premium-grade Rosin Flux Core Solder Sn60 Pb40, available in the most practical diameters of 1.2mm and 1.6mm, packaged in convenient 250g and 0.5kg rolls, engineered specifically to meet the rigorous demands of a professional electronics workshop.
The designation Rosin Flux Core Solder 60 40 precisely defines its metallic composition: 60% Tin (Sn) and 40% Lead (Pb). This eutectic alloy, known as Rosin Flux Core Solder Sn60 Pb40, has a singular, well-defined melting point of approximately 188°C (370°F). This eutectic property is critical for professional work, as the solder transitions directly from solid to liquid and back again without a pasty phase. This results in faster solidification, reduced risk of cold joints, and the formation of smooth, shiny, and reliable solder fillets. The Sn60Pb40 alloy offers excellent electrical conductivity, superior thermal fatigue resistance, and formidable mechanical strength, making it the preferred choice for high-quality, durable electronics work where RoHS compliance is not a regulatory constraint.
The "flux core" is what elevates a simple metal wire into a complete soldering solution. Within our Rosin Flux Core Solder RS40, the core is filled with a mildly activated rosin (RMA) flux, specifically formulated for electronics. This flux performs several vital functions during the soldering process: it removes oxides from the metal surfaces of the component leads and PCB pads, it protects the heated areas from re-oxidation, and it drastically lowers the surface tension of the molten solder, enhancing its flow and wettability. The "RS40" classification indicates a reliable, no-clean formulation that leaves minimal, benign residue, which is typically non-corrosive and non-conductive, often not requiring post-soldering cleaning in most service applications, thereby streamlining the workflow.
To cater to the diverse requirements within an electronics service shop, this high-performance solder is offered in carefully selected specifications that cover the majority of repair and assembly scenarios.
Choosing the correct solder diameter is essential for controlling the amount of solder deposited, which directly impacts joint quality and speed.
Rosin Flux Core Solder 60 40 1.2mm: This finer diameter is the go-to choice for precision work. It is ideal for soldering and desoldering small surface-mount devices (SMDs) such as resistors, capacitors, ICs with fine pitches, and for detailed rework on densely packed printed circuit boards (PCBs). It allows for exceptional control, minimizing the risk of bridging and solder splatter.
Rosin Flux Core Solder 60 40 1.6mm: The 1.6mm diameter is the workhorse for general-purpose tasks. It is perfectly suited for through-hole components, larger connectors, wire-to-board soldering, and any application where a higher volume of solder is needed quickly and efficiently. Its feed rate provides an excellent balance between deposition speed and control.
We understand that shop logistics require flexibility. Therefore, our Rosin Flux Core Solder Sn60 Pb40 is available in two practical roll weights:
Rosin Flux Core Solder 60 40 250g: The 250g roll is a compact and convenient option. It is perfect for keeping at individual technician benches, for use in portable repair kits, or for tasks with specific material requirements. It reduces waste and allows for easy storage and handling.
Rosin Flux Core Solder 60 40 0.5kg: The half-kilogram (500g) roll offers enhanced value and reduces the frequency of roll changes. It is the ideal choice for high-volume workstations, bulk repair operations, or as a central shop supply, ensuring technicians have ample material for extended periods of productive work.
Investing in a high-quality Rosin Flux Core Solder 60 40 translates directly into tangible benefits for your business operations and reputation.
The consistent alloy formulation of Rosin Flux Core Solder Sn60 Pb40 ensures every joint possesses optimal strength and conductivity. This minimizes field failures and call-backs, building trust with your clients.
The combination of the predictable eutectic behavior and the effective RS40 flux core allows for faster wetting and solidification. This means each soldering operation is completed more swiftly and with greater first-pass success, directly boosting productivity.
Whether you are servicing vintage audio equipment, repairing modern consumer electronics, or assembling control boards, the Rosin Flux Core Solder 60 40 is exceptionally versatile. The availability of both Rosin Flux Core Solder Sn60 Pb40 1.2mm and Rosin Flux Core Solder Sn60 Pb40 1.6mm diameters ensures you have the right tool for every job on the bench.
High-quality solder feeds smoothly without kinking, produces minimal spatter, and emits manageable fumes. This creates a cleaner, safer, and more pleasant working environment for your technicians, contributing to overall shop morale and professionalism.
Alloy Composition: 60% Tin (Sn), 40% Lead (Pb) – True Rosin Flux Core Solder 60 40.
Flux Type: Rosin, Mildly Activated (RMA), RS40 classification.
Flux Content: Typically 2.2% ± 0.5% by weight, optimized for effectiveness with minimal residue.
Melting Point: 183~188°C .
Wire Tensile Strength: High, for minimal stretching and breakage during use.
Residue: Low, non-corrosive, and typically non-conductive. No-clean for most applications.
Conforms to Standards: Meets or exceeds relevant industry standards such as J-STD-006 and ISO 9454-1.
While lead-free solders (like SAC305) are mandated for new manufacturing, Rosin Flux Core Solder 60 40 offers significant advantages for repair work. It has a lower melting point, reducing thermal stress on sensitive components and PCBs during rework. It exhibits superior wettability and flow, making it easier to achieve perfect joints, especially on older boards. Its eutectic property ensures reliable joint formation, which is crucial for durable repairs.
Select the Rosin Flux Core Solder Sn60 Pb40 1.2mm for any task requiring high precision. This includes working with SMD components (e.g., 0402, 0603 sizes, fine-pitch QFP, SOIC), repairing laptop motherboards, smartphone PCBs, or any application where space is constrained and solder bridging is a concern. It provides the ultimate control for delicate work.
The Rosin Flux Core Solder Sn60 Pb40 1.6mm is the ideal general-purpose diameter. Use it for through-hole components (resistors, capacitors, DIP ICs, headers), for soldering wires to terminals or boards, for repairing larger joints on power supplies, and for any task where speed of solder deposition is beneficial without sacrificing control. It is the most versatile size for a busy shop bench.
The Rosin Flux Core Solder 60 40 250g roll is perfect for task-specific use, limited bench space, or for technicians who manage a variety of specialized repairs. The Rosin Flux Core Solder 60 40 0.5kg roll offers better value per gram and is designed for high-throughput workstations where minimizing downtime for material changes is a priority. Many shops stock both: 0.5kg rolls for primary stations and 250g rolls for secondary benches or field kits.
Yes, the flux residue from our Rosin Flux Core Solder RS40 is classified as "no-clean" for the vast majority of electronics service applications. The residue is non-corrosive and electrically non-conductive under normal service conditions. However, if the repaired assembly will be subjected to extreme humidity, high voltage, or conformal coating, a cleaning process with an appropriate solvent may still be recommended as a best practice.
No. This Rosin Flux Core Solder 60 40 is formulated specifically for electronics. The rosin flux core is not designed for the oxides present on copper plumbing pipes. For plumbing, a solid wire solder with an acid-based flux is required. Using electronics solder for plumbing will result in poor adhesion and likely joint failure.
To achieve optimal results with your Rosin Flux Core Solder Sn60 Pb40, follow these professional guidelines:
Surface Preparation: Ensure all surfaces to be soldered are clean and free of major contamination. The flux will handle oxides, but not dirt or grease.
Iron Selection and Temperature: Use a temperature-controlled soldering iron. A tip temperature between 320°C and 380°C (608°F - 716°F) is generally ideal for Rosin Flux Core Solder 60 40.
Technique: Apply the iron tip to heat both the component lead and the PCB pad simultaneously. After 1-2 seconds, feed the solder wire (Rosin Flux Core Solder 60 40 1.2mm or 1.6mm) into the junction—not directly onto the iron tip. The molten solder should flow smoothly to cover the surfaces.
Ventilation: Always work in a well-ventilated area or use a fume extractor. While the fumes from rosin flux are not highly toxic, they can be an irritant.
Tip Maintenance: Regularly clean and tin your soldering iron tip to ensure efficient heat transfer and prolong tip life.
For electronics service shops dedicated to quality, reliability, and efficiency, the selection of consumables is a critical business decision. The High Quality Rosin Flux Core Solder 60 40 Sn60 Pb40 represents the pinnacle of soldering wire technology for non-RoHS repair work. Its precise eutectic alloy composition, combined with the effective RS40 rosin flux core, guarantees strong, conductive, and durable joints every time. By offering it in the strategically chosen diameters of Rosin Flux Core Solder 60 40 1.2mm and Rosin Flux Core Solder 60 40 1.6mm, and in the practical roll weights of Rosin Flux Core Solder 60 40 250g and Rosin Flux Core Solder 60 40 0.5kg, we provide a complete soldering solution that adapts to the specific needs of your shop and your technicians. Equip your benches with this trusted product and experience the difference that truly professional-grade materials make in the quality of your work and the satisfaction of your customers.
Contact us:
Email: xfsolder@163.com or xfsolder@gmail.com
WhatsApp/Wechat: 008613450770997
In the intricate world of electronics repair and assembly, the choice of solder is not merely a technical detail—it is the fundamental determinant of connection integrity, long-term reliability, and operational efficiency. For professional electronics service shops, where precision and consistency are non-negotiable, selecting the right soldering material is paramount. Among the array of options available, the High Quality Rosin Flux Core Solder 60 40 stands as a time-tested champion. This specific alloy, with its precise composition of 60% tin (Sn) and 40% lead (Pb), offers an optimal balance of mechanical strength, wettability, and a low melting point, making it an indispensable tool for a vast spectrum of tasks, from delicate surface-mount component replacement to robust through-hole joint formation. This comprehensive guide delves into the specifications, applications, and unparalleled benefits of our premium-grade Rosin Flux Core Solder Sn60 Pb40, available in the most practical diameters of 1.2mm and 1.6mm, packaged in convenient 250g and 0.5kg rolls, engineered specifically to meet the rigorous demands of a professional electronics workshop.
The designation Rosin Flux Core Solder 60 40 precisely defines its metallic composition: 60% Tin (Sn) and 40% Lead (Pb). This eutectic alloy, known as Rosin Flux Core Solder Sn60 Pb40, has a singular, well-defined melting point of approximately 188°C (370°F). This eutectic property is critical for professional work, as the solder transitions directly from solid to liquid and back again without a pasty phase. This results in faster solidification, reduced risk of cold joints, and the formation of smooth, shiny, and reliable solder fillets. The Sn60Pb40 alloy offers excellent electrical conductivity, superior thermal fatigue resistance, and formidable mechanical strength, making it the preferred choice for high-quality, durable electronics work where RoHS compliance is not a regulatory constraint.
The "flux core" is what elevates a simple metal wire into a complete soldering solution. Within our Rosin Flux Core Solder RS40, the core is filled with a mildly activated rosin (RMA) flux, specifically formulated for electronics. This flux performs several vital functions during the soldering process: it removes oxides from the metal surfaces of the component leads and PCB pads, it protects the heated areas from re-oxidation, and it drastically lowers the surface tension of the molten solder, enhancing its flow and wettability. The "RS40" classification indicates a reliable, no-clean formulation that leaves minimal, benign residue, which is typically non-corrosive and non-conductive, often not requiring post-soldering cleaning in most service applications, thereby streamlining the workflow.
To cater to the diverse requirements within an electronics service shop, this high-performance solder is offered in carefully selected specifications that cover the majority of repair and assembly scenarios.
Choosing the correct solder diameter is essential for controlling the amount of solder deposited, which directly impacts joint quality and speed.
Rosin Flux Core Solder 60 40 1.2mm: This finer diameter is the go-to choice for precision work. It is ideal for soldering and desoldering small surface-mount devices (SMDs) such as resistors, capacitors, ICs with fine pitches, and for detailed rework on densely packed printed circuit boards (PCBs). It allows for exceptional control, minimizing the risk of bridging and solder splatter.
Rosin Flux Core Solder 60 40 1.6mm: The 1.6mm diameter is the workhorse for general-purpose tasks. It is perfectly suited for through-hole components, larger connectors, wire-to-board soldering, and any application where a higher volume of solder is needed quickly and efficiently. Its feed rate provides an excellent balance between deposition speed and control.
We understand that shop logistics require flexibility. Therefore, our Rosin Flux Core Solder Sn60 Pb40 is available in two practical roll weights:
Rosin Flux Core Solder 60 40 250g: The 250g roll is a compact and convenient option. It is perfect for keeping at individual technician benches, for use in portable repair kits, or for tasks with specific material requirements. It reduces waste and allows for easy storage and handling.
Rosin Flux Core Solder 60 40 0.5kg: The half-kilogram (500g) roll offers enhanced value and reduces the frequency of roll changes. It is the ideal choice for high-volume workstations, bulk repair operations, or as a central shop supply, ensuring technicians have ample material for extended periods of productive work.
Investing in a high-quality Rosin Flux Core Solder 60 40 translates directly into tangible benefits for your business operations and reputation.
The consistent alloy formulation of Rosin Flux Core Solder Sn60 Pb40 ensures every joint possesses optimal strength and conductivity. This minimizes field failures and call-backs, building trust with your clients.
The combination of the predictable eutectic behavior and the effective RS40 flux core allows for faster wetting and solidification. This means each soldering operation is completed more swiftly and with greater first-pass success, directly boosting productivity.
Whether you are servicing vintage audio equipment, repairing modern consumer electronics, or assembling control boards, the Rosin Flux Core Solder 60 40 is exceptionally versatile. The availability of both Rosin Flux Core Solder Sn60 Pb40 1.2mm and Rosin Flux Core Solder Sn60 Pb40 1.6mm diameters ensures you have the right tool for every job on the bench.
High-quality solder feeds smoothly without kinking, produces minimal spatter, and emits manageable fumes. This creates a cleaner, safer, and more pleasant working environment for your technicians, contributing to overall shop morale and professionalism.
Alloy Composition: 60% Tin (Sn), 40% Lead (Pb) – True Rosin Flux Core Solder 60 40.
Flux Type: Rosin, Mildly Activated (RMA), RS40 classification.
Flux Content: Typically 2.2% ± 0.5% by weight, optimized for effectiveness with minimal residue.
Melting Point: 183~188°C .
Wire Tensile Strength: High, for minimal stretching and breakage during use.
Residue: Low, non-corrosive, and typically non-conductive. No-clean for most applications.
Conforms to Standards: Meets or exceeds relevant industry standards such as J-STD-006 and ISO 9454-1.
While lead-free solders (like SAC305) are mandated for new manufacturing, Rosin Flux Core Solder 60 40 offers significant advantages for repair work. It has a lower melting point, reducing thermal stress on sensitive components and PCBs during rework. It exhibits superior wettability and flow, making it easier to achieve perfect joints, especially on older boards. Its eutectic property ensures reliable joint formation, which is crucial for durable repairs.
Select the Rosin Flux Core Solder Sn60 Pb40 1.2mm for any task requiring high precision. This includes working with SMD components (e.g., 0402, 0603 sizes, fine-pitch QFP, SOIC), repairing laptop motherboards, smartphone PCBs, or any application where space is constrained and solder bridging is a concern. It provides the ultimate control for delicate work.
The Rosin Flux Core Solder Sn60 Pb40 1.6mm is the ideal general-purpose diameter. Use it for through-hole components (resistors, capacitors, DIP ICs, headers), for soldering wires to terminals or boards, for repairing larger joints on power supplies, and for any task where speed of solder deposition is beneficial without sacrificing control. It is the most versatile size for a busy shop bench.
The Rosin Flux Core Solder 60 40 250g roll is perfect for task-specific use, limited bench space, or for technicians who manage a variety of specialized repairs. The Rosin Flux Core Solder 60 40 0.5kg roll offers better value per gram and is designed for high-throughput workstations where minimizing downtime for material changes is a priority. Many shops stock both: 0.5kg rolls for primary stations and 250g rolls for secondary benches or field kits.
Yes, the flux residue from our Rosin Flux Core Solder RS40 is classified as "no-clean" for the vast majority of electronics service applications. The residue is non-corrosive and electrically non-conductive under normal service conditions. However, if the repaired assembly will be subjected to extreme humidity, high voltage, or conformal coating, a cleaning process with an appropriate solvent may still be recommended as a best practice.
No. This Rosin Flux Core Solder 60 40 is formulated specifically for electronics. The rosin flux core is not designed for the oxides present on copper plumbing pipes. For plumbing, a solid wire solder with an acid-based flux is required. Using electronics solder for plumbing will result in poor adhesion and likely joint failure.
To achieve optimal results with your Rosin Flux Core Solder Sn60 Pb40, follow these professional guidelines:
Surface Preparation: Ensure all surfaces to be soldered are clean and free of major contamination. The flux will handle oxides, but not dirt or grease.
Iron Selection and Temperature: Use a temperature-controlled soldering iron. A tip temperature between 320°C and 380°C (608°F - 716°F) is generally ideal for Rosin Flux Core Solder 60 40.
Technique: Apply the iron tip to heat both the component lead and the PCB pad simultaneously. After 1-2 seconds, feed the solder wire (Rosin Flux Core Solder 60 40 1.2mm or 1.6mm) into the junction—not directly onto the iron tip. The molten solder should flow smoothly to cover the surfaces.
Ventilation: Always work in a well-ventilated area or use a fume extractor. While the fumes from rosin flux are not highly toxic, they can be an irritant.
Tip Maintenance: Regularly clean and tin your soldering iron tip to ensure efficient heat transfer and prolong tip life.
For electronics service shops dedicated to quality, reliability, and efficiency, the selection of consumables is a critical business decision. The High Quality Rosin Flux Core Solder 60 40 Sn60 Pb40 represents the pinnacle of soldering wire technology for non-RoHS repair work. Its precise eutectic alloy composition, combined with the effective RS40 rosin flux core, guarantees strong, conductive, and durable joints every time. By offering it in the strategically chosen diameters of Rosin Flux Core Solder 60 40 1.2mm and Rosin Flux Core Solder 60 40 1.6mm, and in the practical roll weights of Rosin Flux Core Solder 60 40 250g and Rosin Flux Core Solder 60 40 0.5kg, we provide a complete soldering solution that adapts to the specific needs of your shop and your technicians. Equip your benches with this trusted product and experience the difference that truly professional-grade materials make in the quality of your work and the satisfaction of your customers.
Contact us:
Email: xfsolder@163.com or xfsolder@gmail.com
WhatsApp/Wechat: 008613450770997
注: 建议图片大小150px*50px 
