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Alloy 280 Muntz Metal

Sequoia Brass & Copper sells alloy 280 muntz metal. With a chemical composition of 60% copper, 40% zinc and a trace of iron, muntz metal is an alpha-beta brass. Also known as yellow metal, 280 muntz metal is commonly used in architectural projects because it is harder, stronger, and more rigid than other forms of brass.


Common fabrication processes for 280 muntz metal are blanking, forming and bending, hot forging and pressing. Excellent hot working, it's a stronger and "springier" alloy at the expense of a moderate decrease in corrosion resistance. Applications include springs, components of electrical switches and sockets, tubes, plumbing goods and fasteners.

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  • Fabrication Properties
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  Cu Fe Pb Zn
Min/Max 59.0 - 63.0 0.07 0.09 Rem.
Nominal 60 40
Joining Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Gas Shielded Arc Welding Fair
Coated Metal Arc Welding Not Recommended
Spot Weld Good
Seam Weld Not Recommended
Butt Weld Good
Capacity for Being Cold Worked Fair
Capacity for Being Hot Formed Excellent
Forgeability Rating: 90
Machinability Rating: 40
 
Product Forms
Bar
Plate
Sheet
Strip
Tube
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Common Fabrication Processes For
280 Muntz Metal

Blanking, forming and bending, hot forging and pressing, shearing, hot heading and upsetting

Typical Uses

Architecture
Decoration, architectural panels, hardware, door frames, large architectural trim, structural, heavy plate, sheet
Builders Hardware
Decorative hardware
Fasteners
Bolts
Industrial
Condenser tube, valve stems, hot forgings, heat exchanger tube, large nuts and bolts, evaporator tubes, brazing rod, condenser plates