C87850 Description

Copper silicon UNS C87850 has a copper content of not less than 74%.

Tabulated below are the mechanical properties of UNS C87850 permanent mold cast alloy as a function of heat treatment.

TemperElong.Rockwell
BCF30T
M0521%74
16%70

 

Category:
  • C87850 Product description: Silicon brass
  • Solids: Consult mill for sizes
  • Tubes: Consult mill for sizes*
  • Rectangles: Consult mill for sizes
  • 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
  • Compliance: C87850 is compliant with key legislation including (1) Federal Safe Drinking Water Act – SDWA, (2) S. 3874 Federal Reduction of Lead in Drinking Water Act, (3) California AB1953, and (4) Vermont Act 193

*Consult mill for wall thickness

Typical uses

Industrial: valve bodies for water
Marine: marine products
Plumbing: faucets, plumbing fittings, water meter cases

Similar or equivalent specification

CDAASTMSAEAMSFederalMilitaryOther
C87850B505
B505M

Chemical composition

Cu%Pb%Sn%Zn%Fe%P%Ni%1Mn%Sb%Si%
75.00-
78.00
0.02*-
0.09
0.30Rem.0.100.05-
0.20
0.200.100.102.70-
3.40
Chemical composition according to ASTM B505/B505M-23*Pb content is greater than 0.02%.  1Ni value includes Co.Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.

Machinability

Copper alloy UNS No.Machinability ratingDensity (lb/in3 at 68 ˚F)
C87850700.3

Mechanical properties

Tensile strength, minYield strength (at 0.5% extension under load,, min)Elongation, in 2 in. or 50 mm minBrinell hardness (500 kg load)Remarks
ksiMPaksiMPa%minimum BHN
65448251728103
Mechanical properties according to ASTM B505/B505M-23

Physical properties

US CustomaryMetric
Melting point – liquidus1616 °F880 °C
Melting point – solidus1571 °F855 °C
Density0.3 lb/in3 at 68 °F8.3 gm/cm3 at 20 °C
Electrical conductivity8% IACS at 68 °F0.046 MegaSiemens/cm at 20 °C
Thermal conductivity21.8 Btu/sq ft/ft hr/°F at 68 °F37.8 W/m at 20 °C
Coefficient of thermal expansion 68-21210.3 · 10-6 per °F (68-212 °F)17.8 · 10-6 per °C (20-100 °C)
Coefficient of thermal expansion 68-39210.3 · 10-6 per °F (68-392 °F)17.8 · 10-6 per °C (20-200 °C)
Coefficient of thermal expansion 68-57210.4 · 10-6 per °F (68-572 °F)18 · 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 elasticity in tension15200 ksi104801 MPa
Physical properties provided by CDA

Fabrication properties

TechniqueSuitability
SolderingExcellent
BrazingExcellent
Oxyacetylene weldingGood
Spot weldGood
Seam weldGood
Butt weldGood
Capacity for being cold workedPoor
Capacity for being hot formedExcellent
Machinability rating70
Fabrication properties provided by CDA

Thermal properties

Thermal properties provided by CDATemperature 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.