Description
Leaded Brasses:
Used for their high machinability and atmospheric corrosion resistance. The machinability of brass is increased by the addition of lead because it acts as a microscopic chip breaker and tool lubricant. The leaded brasses are used for copper base screw machine material. The alloys have excellent machinability, good strength and corrosion resistance. Lead can be added to any brass to increase machinability and provide pressure tightness by sealing the shrinkage pores. There are low, medium and high leaded brasses, with lead contents up to 3.5%. The lead brasses are used for architectural hardware, general purpose screw machine parts, screws, valves, fittings, bearings and specialty fasteners.
Tin Brass:
Used for its increased corrosion resistance and somewhat higher strength than straight brass. This family of alloys is made with zinc contents ranging form 2 to 40% zinc, and 0.2 to 3.0% tin. Tin reduces susceptibility of the high zinc brass to dezincification. Dezincification is the selective leaching of zinc from the brass leaving a porous copper structure.
Chemistry Typical
Leaded Brass
UNS# COPPER TIN LEAD IRON ZINC PHOSPHORUS
C35000 60.0-63.0 0.8-2.0 0.15 max Balance
C35300 60.0-63.0 1.5-2.5 0.15 max Balance
Tin Brass
UNS# COPPER TIN LEAD IRON ZINC PHOSPHORUS
C42200 86.0-89.0 0.8-1.4 0.05 max 0.05 max Balance 0.35 max
C42500 87.0-90.0 1.5-3.0 0.05 max 0.05 max Balance 0.35 max
Physical Properties
Typical Density:
Leaded Brass: 0.306 lb/in3, 8.47 g/cm3
Tin Brass: 0.317 lb/in3, 8.78 g/cm3
Electrical Conductivity: (% IACS at 68° F 20°C, annealed):
Leaded Brass: 26%
Tin Brass: 28-31 %
Thermal Conductivity: BTU-in/hr-ft2-° F
At 68° F: 67 – 75
Mean Coefficient of Thermal Expansion: µin/in-° F 68 – 572 ° F: 10.2 – 11.3
Modulus of Elasticity: KSI
15 – 16 x 103 in tension
Applications
Leaded Brass:
Clock and watch components, Meter components, Lock components, Key blanks, Gears
Tin Brass:
Electrical switch springs, Fuse clips, Pen clips, Electrical connectors, Electrical Terminals
FAQ
Q: what does your company do?
A：Our company is a professional manufacturer. We mainly produce stainless steel plate series (hot-rolled and cold-rolled 200, 300 and 400 Series), stainless steel pipe and coil, ppgi and galvanized steel plate and coil.
Q: what are the advantages of your company?
A: (1): high quality and reasonable price.
(2) : extensive and good after-sales service experience.
(3) : each process will be inspected by the responsible QC to ensure the quality of each product.
(4) : professional packaging team to keep each package safely.
(5) : the trial order can be completed within one week.
(6) : samples can be provided according to your requirements.
Q：what’s your price?
A：Our price is very competitive because we are a factory. If you are interested in our products, please feel free to contact us.
Q：how long is your delivery time?
A：Different products have different delivery times. The products will be delivered as soon as possible on the basis of quality assurance. The usual delivery time is within 5 days after we receive your deposit.
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