Square and Rectangle Metal Tubes
Square and Rectangle Metal Tubes

A280 Bronze Square Tubing

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Alloy 280 Bronze Square Tubing, commonly known as Muntz Metal, is a copper-zinc alloy containing approximately 60% copper and 40% zinc. The higher zinc content increases strength and rigidity compared to higher-copper brasses. The square tubing profile provides flat surfaces for secure fastening and defined corners for clean structural alignment. Its geometry supports directional stiffness in framed assemblies while maintaining fabrication flexibility.

Construction: Bracing components, support posts and reinforcement tubing
Marine: Structural railing systems, dock and marina framing and hardware supports

Copper: 59% – 63%
Zinc: 36.3% – 41%
Iron: 0.07%
Lead: 0.3%
Length: 16ft
Standards: ASTM-B135

CDA Standards

ASTM Standards

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A280 Bronze Square Tubing FAQs

Alloy 280 has historically been used in marine hardware and structural components. Its performance depends on exposure conditions, including salinity and immersion level. Proper specification, coating (if required), and maintenance practices help support long-term durability in marine settings.

Alloy 280 can be used in applications with moderate cyclic loading when properly supported. Joint design and connection integrity are critical to minimize stress concentrations. Structural analysis should consider fatigue factors where vibration is present.

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