Brass Copper Castings India
C94800 Leaded Nickel Tin Bronze


Copper Alloy No. C94800
Leaded Nickel Tin Bronze CDA 948 ASTM B 505
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .15
Copper 86.5 84 89
Iron - - .25
Lead .70 .30 1
Manganese - - .20
Nickel 5.3 4.5 6
Phosphorus - - .05
Silicon - - .005
Sulfur - - .05
Tin 5 4.5 6
Zinc 1.8 1 2.5

Applications

Structural castings, gear components, motion translation devices, machinery parts, bearings.

Mechanical Properties

M07 - As Continuous Cast

Hardness* Brinell Hardness (500 kg load) 80
Tensile Strength** KSI 40 min
Yield Strength ** KSI (0.5% Ext. under load) 20 min
Elongation** % in 2 inch 20 min

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 22.3
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 572 F .000011
Density lb/cu in @ 68 F .320
Electrical Conductivity* (Annealed) % IACS @ 68 F 12
Modulus of Elasticity KSI 15,000

*Volume basis

Fabrication Practices

Stress relieving temperature 500 F or 260 C
Time at temperature 1 hour per inch of section thickness
Responds to heat treatment Yes
Machinability rating (Free Cutting Brass=100) 50
Suitability for being joined by: Soldering/Excellent
Brazing/Good*
Oxyacetylene Welding/Not Recommended
Carbon Arc Welding/Not Recommended
Gas Shielded Arc Welding/Not Recommended
Coated Metal Arc Welding/Not Recommended