Silver Metals

SAE660 / W7 Bronze

Tough and corrosion-resistant bronze crafted for durability and lasting performance.

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SAE660 / W7 Bronze

sae660-w7-bronze-product-image

W7 Bronze (SAE660) is a high leaded, tin based bronze alloy offering excellent machinability, strong load carrying capacity, and good resistance to corrosion in brine and seawater.

Key Features

This bronze alloy combines easy machining due to its lead content with good sliding and dry running properties under moderate loads. It is resistant to dezincification, making it ideal for pump and valve components, bearings, and bushings.

Typical Applications
  • General purpose bushes & bearings under moderate loads
  • Valve and slide seating rings
  • Fuel and water pump bushings
  • Automotive fittings and hydraulic components
  • Pump and valve components exposed to brine or seawater environments
Forms of Supply

Available as square bars, round bars, hex bars, flat bars, blocks, sheets, and plates in continuously cast format. We supply W7 bronze across the UAE, Oman and Saudi Arabia with cut to size and machining services.

sae660-w7-bronze-product-image

W7 Bronze is a high leaded, tin based alloy engineered for components that demand excellent machinability and moderate load bearing capability. The combination of copper, tin, lead, and zinc gives this alloy good wear resistance, corrosion protection in brine and seawater, and dependable performance in pumps, valves, bearings, and bushings. We are a reliable supplier of Bronze, offering high quality materials for diverse industrial applications.

 

The alloy’s leaded structure supports smooth machining while maintaining strength and durability. W7 Bronze also offers excellent sliding and dry running performance, making it well suited for bushings, seating rings, and other precision components exposed to moderate operating stresses. As a trusted non ferrous metal trader in the UAE, we supply W7 Bronze to customers across Saudi Arabia and Oman for a wide range of industrial applications.

Key Advantages & Uses of W7 Bronze
  • High tensile strength (~205–240 MPa) and proof strength (~100–140 MPa) for medium load applications
  • Excellent machinability due to lead content for precise component fabrication
  • Good wear and abrasion resistance under sliding contact and moderate loads
  • Corrosion resistance in brine and seawater; not prone to dezincification
  • Thermal stability with melting range ~977 °C and moderate thermal expansion (~18 ×10⁻⁶ /K)

Technical Specifications

Specifications & Mechanical Properties
  • Copper (Cu): 81.0‑85.0% – base matrix element.
  • Tin (Sn): ~6.0‑8.0% – reinforces strength and wear resistance.
  • Lead (Pb): ~6.0‑8.0% – enhances machinability and lubrication.
  • Zinc (Zn): Up to ~4.0% – contributes to alloy structure.
  • Density: ~8.9 g/cm³ – heavy and robust material.
  • Tensile Strength (min): ~205‑240 MPa (depending on casting method)
  • Proof Strength (0.2%): ~100‑140 MPa
  • Elongation: ~10‑15% (continuous cast)
  • Hardness: ~65‑70 HB (typical)
  • Processing / Treatment: Supplied continuously cast; best performance achieved with proper machining and lubrication.
Thermal, Electrical & Miscellaneous Properties
  • Melting Point (approx.): ~977 °C liquidus/solidus for this alloy family.
  • Thermal Conductivity: ~58 W/m·K (approx at room temperature)
  • Coefficient of Linear Thermal Expansion: ~18 ×10⁻⁶ /K (20‑200°C)
  • Electrical Conductivity: ~12% IACS @20 °C – moderate.
  • Wear & Abrasion Resistance: Good under sliding contact and moderate load when adequately lubricated.
  • Corrosion Resistance: Resistant to brine and seawater; not prone to dezincification.
  • Machinability: Excellent – lead content gives very good free‑machining performance compared to similar bronzes.

Technical Assistance

Our expert team and in-house metallurgists are available to provide guidance on any technical queries. At Silver Metal, we combine extensive industry knowledge with rigorous quality control to ensure every product meets the highest standards.

Silver Metal supplies high-quality metals and materials for a wide range of industries, including construction, oil & gas, manufacturing, and architectural projects across the UAE and Gulf region.

Yes! We offer tailored solutions and processing options to meet your exact project requirements. Our team can guide you through customization for all our products.

Absolutely. Each product comes with detailed technical datasheets, and our in-house metallurgists are available to assist with any technical queries.

You can easily contact our team via the website to request a quote or discuss your project. We provide professional support to ensure your requirements are met accurately and efficiently.

Custom Orders & Support

Looking for a specific grade, finish, or size? Our team provides tailored metal solutions to match your project requirements. Contact us today.

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