Muntz Metal (60:40 brass), marine applications (1.2mm, 1.6mm, 2.0mm, 3.0mm sheet)
Muntz metal is a historic brass alloy developed by George Fredrick Muntz in 1832 as a cost-effective replacement for pure copper sheathing on ship hulls. This duplex brass contains approximately 59-63% copper, 37-41% zinc, and 0.05-0.35% iron, creating an alpha-beta crystal structure that provides enhanced strength over pure alpha brasses. The material exhibits superior antifouling properties through copper ion leaching, which prevents marine organism attachment. While less corrosion-resistant than naval brass (which contains tin), Muntz metal provides adequate performance in marine atmospheres at lower cost. The alloy must be hot-worked due to its duplex structure and work-hardens rapidly when cold-formed. Available in standard sheet thicknesses for marine and architectural applications.
- Ship hull sheathing and marine vessel protection
- Architectural cladding and facade panels
- Elevator interiors and decorative panels
- Marine hardware and boat fittings
- Pier pile sheathing in tropical waters
- Heat exchanger tubes and condenser plates
- Decorative interior design elements
- Coastal building components
- Bolts and fasteners for marine use
- Industrial valve and pump components
- Architectural trim and signage
- Heritage building restoration
Muntz metal was patented in 1832 by George Fredrick Muntz of Birmingham, England, as patent #6325. Developed as a cheaper alternative to pure copper for ship sheathing, it cost approximately two-thirds the price while maintaining antifouling properties. Production began in Birmingham then moved to Swansea in 1837. By 1840, over 100 ships annually were being sheathed with Muntz metal. The Cutty Sark famously used Muntz metal in its hull construction. When the patent expired in 1846, production expanded globally. The alloy revolutionised 19th-century shipbuilding by providing affordable protection against marine borers (teredo worms) in tropical waters. Standard sheets were 48 inches by 14 inches to overlap ship planking. Modern applications have shifted from marine to architectural uses, valued for its golden-bronze appearance and durability.
DISCLAIMER: This specification document is generated from the CLAD Materials Atlas Database. Information is for general guidance only and does not constitute professional engineering advice. Values are typical and may vary by batch, manufacturer, and production run. Verify suitability for specific project applications independently.