Flat, Shaped and Round Wire 


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 


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 

* Contact Ulbrich Wire for request regarding the availability of other copper alloys.
* Contact Ulbrich Technical Department for limits for additional trace elements and impurity levels.
* Copper plus sum of named elements 99. 6% min. * Copper 61.0% min. for rod.
* Copper plus named elements 99.5% min.
* For flat products, iron 0. 10% max.
* Copper plus named elements 99. 7% min.

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 


Profile, Round, Flat, Square 

Mechanical Properties at Room Temperature 

Properties: Annealed Typical 

Leaded Brass 
Ultimate Tensile Strength: 46 KSI min (317 MPa min)
Yield Strength: 21 KSI min (144 MPa min)
Elongation: 50% min 

Tin Brass
Ultimate Tensile Strength: 41 KSI min (282 MPa min)
Yield Strength: 17 KSI min (117 MPa min)
Elongation: 45% min 

Properties: Tempered

Lead and Tin Brass alloys can be cold worked to various tempers. 

*Actual physical and mechanical properties are alloy dependent. Contact Ulbrich Technical Service for alloy specific properties.

Additional Properties

Corrosion Resistance

Contact Ulbrich Wire for specific information. 

Wire Finishes

XC - Extra clean. Annealed or annealed and cold rolled. Contact Ulbrich Wire with special finish requests. 

Heat Treatment

Lead and Tin Brass alloys are not hardenable by heat treatment. 


Contact Ulbrich Wire for specific information. 

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels & Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the 'applications' noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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