Manufacturer of custom machined bronze parts

Cast C84400

This group of alloys is typically found in plumbing applications. C84400 is the most widely used alloy in the semi-leaded red brass family, known for its reasonable cost with good machining and casting properties. The lead content ensures pressure tightness. Red brass is also used for low-cost bearing materials under low loads.


Product description: Leaded Semi-Red Brass
Solids: 1/2" to 13" O.D.
Tubes: 1” to 16” O.D.
Rectangles: Up to 20”
Standard lengths: 144”
Shape/Form: semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar

Typical uses

ARCHITECTURE: ornamental fixtures
BUILDERS HARDWARE: cases for dead bolt locks, dead bolt locks, door hardware for prisons, hardware
Building: cooling equipment, heating equipment
CONSUMER: musical instruments
ELECTRICAL: electrical equipment
Industrial: low-pressure fittings, pump fixtures, valve bodies for the water industry, valve seat, valves, valves for water meters
MARINE: boat parts, marine hardware, nuts for transducers
Plumbing: fixtures, pipe fittings

Similar or equivalent specification

C84400B505 B505M
B271 B271M
WW-U-516Valve Metal

Chemical composition


Chemical composition according to ASTM B505/B505M-23

¹In determining Cu min., Cu may be calculated as Cu + Ni. ²Ni value includes Co.
Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.


Copper alloy UNS no.Machinability ratingDensity (lb / in³ at 68°F)

Mechanical properties

Tensile strength, minYield strength, at 0.5% extension under load, minElongation, in 2 in. or 50 mm minBrinell hardness (500 kg load)Remarks
ksiMPaksiMPa%typical BHN

Chemical composition according to ASTM B505/B505M-23

Physical properties

US CustomaryMetric
Melting point - liquidus1840 °F 1004 °C
Melting point - solidus1549 °F 843 °C
Density0.314 lb/in³ at 68 °F 8.69 gm/cm³ at 20 °C
Specific gravity8.698.69
Electrical conductivity16.4% IACS at 68 °F 0.095 MegaSiemens/cm at 20 °C
Thermal conductivity41.8 Btu/sq ft/ft hr/°F at 68 °F 72.4 W/m at 20 °C
Coefficient of thermal expansion 68-57210 · 10-6 per °F (68-572 °F)17.3 · 10-6 per °C (20-300 °C)
Specific heat capacity0.09 Btu/lb/°F at 68 °F377.1 J/kg at 20 °C
Modulus of elastic in tension13000 ksi89600 MPa
Magnetic permeability11

Fabrication properties

Oxyacetylene weldingNot recommended
Gas shielded arc weldingNot recommended
Coated metal arc weldingFair
Machinability rating90

Thermal properties

Stress relief500
Solution treatment0

*Temperature is measured in Fahrenheit. **For stress relief, solution treatment and annealing - time is measured in hours/inch of thickness. For precipitation heat treatment - time is measured in hours.

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