Approximately half of the world’s tin supply is used for solderability applications across various industries. It’s naturally soft composition makes tin ideal for forming reliable electrical connections. Yet over time, pure tin can undergo a chemical shift, resulting in “whiskers” that can compromise the performance of electrical components and lead to short circuits.
To prevent whiskers and improve overall material properties, several tin alloys have been developed. Among them, tin-lead stands out as the top choice for electrical connectors and electronics, offering excellent solderability and greater stability than pure tin.
At American Electro Products, we offer full-service electroplating, including selective striping, additive masking and complete coverage with tin-lead. Discover how this versatile alloy can enhance your project’s performance and durability.
What Is Tin-Lead?
Often referred to as “solder plate”, tin-lead has earned its reputation through consistent, high-performance results in soldering applications. The most common used mixture – 63% tin and 37% lead – delivers optimal solderability, abrasion resistance and a low melting point of 361°F, while also reducing the risk of whisker formation.
In electroplating:
- Tin-lead formulations can be customized based on your industry and performance requirements.
- Coatings usually appear matte silver-gray, but reflow treatments or top finishes can produce a brighter, more reflective look.
- Reflowing also helps minimize whisker growth.
- Like pure tin, tin-lead can be plated onto a range of substrates, including ferrous and cuprous alloys, aluminum, monel, magnesium, nickel and more.
Benefits of Tin-Lead Plating
Tin-lead plating offers a wide range of benefits across industries:
- Improves soldering reliability while delivering a smooth, uniform finish.
- Maintains tin’s core attributes: malleability, corrosion resistance and protection against oxidation, abrasion and wear.
- Effectively prevents tin whiskers, improving reliability in sensitive electronic components.
- Higher hydrogen overvoltage allows use with more acidic plating solutions.
- Protects the substrate from damage during downstream processes like stamping or forming.
Applications for Tin-Lead
Tin-lead is used across multiple industries where conductivity, durability and solderability are critical:
- Electronics manufacturing
- Aerospace and defense
- Battery and energy storage systems
- Railway and mass transit
- Fire protection systems
- Heavy-load and structural components
Our Tin-Lead Plating Services
Looking for a trusted partner for your tin-lead electroplating needs? Here is how AEP can support your operations:
- Versatile Application Methods: From selective spot or stripe plating to full coverage and reflow plating, we tailor our approach to your needs.
- Custom Alloys Available: Choose from standard ratios like 93/7 or 60/40, or request a custom blend. Our team will help you evaluate each alloy’s melting points and mechanical properties.
- Industry-Compliant Finishes: We plate to meet ASTM B579, AMS-P-81728, MIL-P-81728, MIS-41177 and other required specifications for alloy composition and plating thickness.
- Comprehensive Pre-Treatment: Every project begins with a thorough, multi-stage cleaning process to remove oils, debris and other surface imperfections.
- Turnkey Finishing Options: Post-treatment services include laser marking, engraving and hydrogen bake-out to ensure optimal performance and longevity.
Interested in tin-lead plating for electrical components, defense or aerospace parts, or another application?