Reference guide

Continuous cast

Red brass alloys such as C844 are typically utilized in plumbing applications. The most widely used alloy in this family is C84400 semi-leaded red brass, known for its reasonable cost with good machining and casting properties. The lead content ensures pressure tightness. Red brass is also used as a cost-effective material for low-load bearings.


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

 *Consult mill for wall thickness

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 seats, valves, valves for water meters
Marine: Boat parts, marine hardware, nuts for transducers
Plumbing: Fixtures, pipe fittings

Similar or equivalent specification

CDA ASTM SAE AMS Federal Military Other
C84400 B505
    WW-U-516   Valve Metal

Chemical composition

Cu%1 Pb% Sn% Zn% Fe% P% Ni%1,2 Al% S% Sb% Si%
Chemical composition according to ASTM B505/B505M-23

1In determining Cu min., Cu may be calculated as Cu + Ni.   2Ni value includes Co.
Note: Single values represent maximums.


Copper alloy UNS No. Machinability rating Density (lb/in3 at 68 °F)
C84400 90 0.314

Mechanical properties

Mechanical properties according to ASTM B505/B505M-23
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, in 2 in. or 50 mm min Brinell hardness (500 kg load) Remarks
ksi MPa ksi MPa % typical BHN  
30 207 15 103 16 55

Physical properties

Physical properties provided by CDA
  US Customary Metric
Melting point - liquidus 1840 °F 1004 °C
Melting point - solidus 1549 °F 843 °C
Density 0.314 lb/in3 at 68 °F 8.69 gm/cm3 at 20 °C
Specific gravity 8.69 8.69
Electrical conductivity 16.4% IACS at 68 °F 0.095 MegaSiemens/cm at 20 °C
Thermal conductivity 41.8 Btu/sq ft/ft hr/°F at 68 °F 72.4 W/m at 20 °C
Coefficient of thermal expansion 68-572 10 · 10-6 per °F (68-572 °F) 17.3 · 10-6 per °C (20-300 °C)
Specific heat capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 20 °C
Modulus of elasticity in tension 13000 ksi 89600 MPa
Magnetic Permeability 1 1

Fabrication properties

Fabrication properties provided by CDA
*Since brazing is performed within the hot-short range, strain must be avoided during brazing and cooling.
Technique Suitability
Soldering Excellent
Brazing* Good
Oxyacetylene welding Not recommended
Gas shielded arc welding Not recommended
Coated metal arc welding Fair
Machinability rating 90

Thermal properties

Thermal properties provided by CDA
*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.
Treatment Value* Time**
Stress relief 500  
Solution treatment   0

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