Rosin-Core Solder Wire

🏭 Product Overview
Rosin-Core Solder Wire of ours is a lead-based solder designed using the RS (rosin syndication) process. It delivers high reliability, excellent wetting, and transparent rosin residue for clean, shiny solder joints across various metals and applications.

🌟 Key Features

1. Adaptable and Active Flux Core
   • The specially formulated rosin provides moderate activation, enabling compatibility with a wide range of metals and soldering scenarios.
2. Non-Corrosive & Low Odor
   • Leaves no harmful residue, emits minimal odor, and avoids spattering during soldering.
3. Fast, Efficient Soldering
   • Rapid melting and smooth flow help reduce labor and improve throughput. 
4. Clean, Shiny Finish
   • Transparent rosin residue ensures polished joints without post-cleaning. 

📊 Alloy & Physical Specifications
The solder wire is available in a variety of tin/lead compositions, diameters, and packaging weights:
Alloy Mix:
63/37; 60/40; 50/50; 45/55; 40/60; 30/70
Melting Point:
183 ° ~ 258 °
Specific Gravity:
8.4 ~ 9.7
Diameters (mm):
0.3, 0.5, 0.8, 1.0, 1.2, 2.0, 3.00
Packaging:
0.1 kg – 10 kg spools

🛠️ Performance Metrics (RA‑Type K‑300)

• Flux Content: 1.5 %–2.5 % by weight
• Halogen Content: 0.3 %–0.4 %
• Copper Corrosion: Passes standard test
• Water Resistance: ≥ 100,000 Ω·cm
• Insulation Resistance / DC Voltage Hold: ≥ 1×10⊃1;⊃2; Ω
• Spread (Diffusion) Rate: ~90 %
• Flux Type: RA (Rosin Activated)
• Classification: K‑300 general‑purpose electronic solder wire 

🛡️ Benefits & Ideal Applications

• Versatile Application: Suitable for general electronics assembly, through-hole, drag soldering, and multi-metal bonding.
• Efficiency & Workability: Excellent wetting and flow characteristics for fast, smooth solder joints that save time and labor.
• Clean Finish: Transparent rosin residue results in aesthetically pleasing solder joints without additional cleaning.
• Reliable Performance: Tested to meet rigorous corrosion, resistance, and diffusion standards.

✅ Summary
Our  Rosin‑Core Solder Wire (RA, K‑300) is a premium product offering:

• Active rosin flux for wide material applicability
• Minimal odor and no spatter for a cleaner workplace
• Rapid soldering and polished finish
• Standard-compliant performance in insulation, corrosion, and spread metrics

Perfect for general-purpose electronic manufacturing, repair work, and metal assembly where clean soldering and reliable joints are essential.