C26800

C26800 is a yellow brass alloy also known as CuZn33, CW506L, or 66/34 brass. It combines excellent cold forming properties with good mechanical strength and corrosion resistance. It is often referred to as "deep-draw" brass due to its outstanding workability for processes like deep drawing and stamping.

Chemical Composition

• Copper (Cu): 64.00% – 68.50%

• Zinc (Zn): Balance (around 31.5% – 36.0%)

• Lead (Pb): Up to 0.09%

• Iron (Fe): Up to 0.05%

• Total impurities: Up to 0.30%

Mechanical Properties (Typically for Temper H02)

• Tensile Strength: 365 – 448 MPa (53 – 65 ksi)

• Proof Stress: 230 – 304 MPa (33 – 44 ksi)

• Elongation: Minimum 10 – 31%

• Hardness: 70 – 115 HRB

Physical Properties

• Density: ~8.47 g/cm³

• Melting Point (Solidus): 1660°F (900°C)

• Melting Point (Liquidus): 1710°F (932°C)

• Electrical Conductivity: Approx. 27% IACS at 68°F

• Thermal Conductivity: ~67 Btu/sq ft/ft/hr/°F (116 W/m·K)

• Coefficient of Thermal Expansion (68–572°F): ~11.3 × 10⁻⁶ /°F

Fabrication and Uses

• Excellent for cold forming, bending, deep drawing, and stamping

• Good corrosion resistance and soldering/brazing properties

• Acceptable welding by oxyacetylene and spot welding, but seam welding not recommended

• Machinability rating: Approximately 30%

• Commonly used in automotive parts, fasteners, architecture, builder's hardware, marine fittings, plumbing, and electrical components