C35300

The C35300 alloy is a high leaded brass primarily used for machining, with good cold working capabilities and fair machinability. It is suited for applications involving knurling, thread rolling, and forming wires, rods, and sections.

Chemical Composition

• Copper (Cu): 60.00% - 63.00%

• Lead (Pb): 1.50% - 2.50%

• Iron (Fe): Up to 0.15%

• Other elements: Up to 0.5%

• Zinc (Zn): Remainder of the composition

Mechanical Properties (ASTM B453, Temper HO2)

• Ultimate Tensile Strength (UTS): 345 to 555 MPa (depending on size and shape)

• Proof Strength (PS): Minimum around 140 to 170 MPa

• Elongation: 7% - 15%

• Hardness (HRB): 40 - 80 (varies by shape and temper)

Physical Properties

• Melting point (liquidus): 1670°F (910°C approx.)

• Solidus melting point: 1630°F (887°C approx.)

• Density: 8.47 g/cm³ (0.306 lb/cu in)

• Electrical conductivity: About 26% IACS at 68°F

• Thermal conductivity: 67 Btu/sq ft/ft/hr/°F at 68°F

• Coefficient of thermal expansion: 11.3 x 10⁻⁶ per °F (68–572°F)

• Modulus of Elasticity in tension: ~15000 ksi

• Modulus of Rigidity: ~5600 ksi

Fabrication and Machinability

• Excellent for soldering

• Good for brazing

• Welding (oxyacetylene, gas shielded arc, coated metal arc, spot weld, seam weld) is not recommended

• Fair for butt welds

• Fair capacity for cold working

• Poor capacity for hot forming

• Machinability rating: Approximately 90% relative to Alloy 360 Free Cutting Brass (rated 100%)

Typical Uses

• Automotive components

• Builders hardware

• Consumer products

• Electrical fittings

• Fasteners

• Industrial applications

• Ordnance

• Plumbing fixtures