Brass Copper Castings India
Naval Brass Alloy C46400 (Lead Free)

Copper Alloy No. C46400
Naval Brass , CDA 464
ASTM B21 , ASTM B171
Chemical Composition % by weight
Element Nominal Minimum Maximum
Copper 60 59 62
Lead - - .20
Iron - - .10
Tin .8 .5 1
Zinc 39.2 Remainder
Arsenic** - .02 .06
Sb or P** - .02 .10

* The uninhibited alloy is is copper alloy no. C46400. 

** Arsenic, Antimony and Phosphorus inhibited alloys are identified respectively by copper alloy nos. C46500, C46600 and C46700.


Hardware: Aircraft turnbuckle barrels, balls, bolts.

Industrial: Condenser plates, welding rod.

Common Fabrication Processes

Blanking, drawing, forming and bending, heading and upsetting, hot forging and pressing, hot heading and upsetting, shearing.

Mechanical Properties

Typical for 1" Rod Half Hard (20%) Temper

Hardness* Rockwell B Scales 82
Tensile Strength** KSI 75
Yield Strength** (.5% EAU) KSI 53
Elongation** % in 2 inch 20

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 67
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 572 F .0000118
Density lb/cu in @ 68 F .304
Electrical Conductivity* (Annealed) % IACS @ 68 F 26
Modulus of Elasticity (Tension) KSI 15,000

*Volume basis

Fabrication Properties

Capacity for being cold worked Fair
Capacity for being hot formed Excellent
Machinability rating (Free Cutting Brass=100) 30
Suitability for being joined by: Soldering/Excellent
Oxyacetylene Welding/Good
Gas Shielded Arc Welding/Fair
Coated Metal Arc Welding/Not Recommended
Resistance Welding Spot/Good