Why Choose Our Tin Coated Expander Mandrels?

When it comes to tube expansion, durability and precision are non‑negotiable. The Tin Coated Expander Mandrels 749019000 combine a robust alloy core with a high‑quality tin coating to deliver unmatched corrosion resistance, dimensional stability, and wear resistance. Designed for HVAC, automotive, and heavy‑industry applications, these mandrels ensure a flawless fit and long service life even under harsh operating conditions.

Key Benefits

• Excellent corrosion protection thanks to a uniform tin coating.
• High tensile strength for consistent expansion force.
• Precision‑machined dimensions guarantee perfect tube‑to‑mandrel fit.
• Reduced friction leading to smoother operation and less wear on the expander tool.
• Compatible with a wide range of tube sizes and wall thicknesses.
• Easy to clean and maintain – the tin coating prevents buildup of debris.

Technical Specifications

• Part Number: 749019000
• Coating Material: Tin (≥99.5% purity)
• Core Material: High‑strength alloy steel
• Diameter Range: 10 mm – 80 mm (custom ranges available)
• Length: 150 mm standard (options up to 300 mm)
• Surface Roughness (Ra): ≤ 0.8 µm
• Operating Temperature: -30 °C to +250 °C
• Hardness (Rockwell C): 45‑52 HRC
• Compliance: ISO 9001, EN 10204

Application Areas

Our tin coated expander mandrels are the ideal choice for a variety of sectors, including:

• HVAC ductwork and refrigerant line installation
• Automotive exhaust and fuel line manufacturing
• Industrial piping and fluid transport systems
• Marine and offshore equipment where salt‑water corrosion is a concern
• Electrical conduit expansion and grounding installations

Installation & Maintenance Tips

1. Inspect the mandrel surface before each use to ensure the tin coating is intact.
2. Apply a light, compatible lubricant to reduce friction if required by the specific expander tool.
3. After use, clean the mandrel with a non‑abrasive solvent and store in a dry environment.
4. Periodically verify dimensional accuracy with calibrated measuring tools.
5. Replace the mandrel if any signs of coating wear, cracking, or deformation are observed.

Ordering Information

To ensure you receive the correct mandrel for your project, reference the part number 749019000 when placing an order. Custom diameters, lengths, or coating thicknesses are available upon request – simply contact our technical support team.