Free Cutting Brass Hollow Rods

Chemical Requirements	Grade I
Copper	56.0 – 59.0%
Lead	2.0 to 3.50%
Iron	0.35% max.
Total Imp. Excl. Iron	0.70% max.
Zinc	Remainder
Physical Properties
Condition	Size	T.S. MPA	EL% Min
Annealed (O)	6-25 25-50 50 above	345 315 285	12 17 22
Half-Hard (HB)	6-12 12-25 25-50 50 above	405 395 355 325	4 6 12 17
Hard (HD)	6-12 12-25	550 490	– 4
Fabrication Properties
Capacity for being
Cold worked	Poor
Hot formed	Fair
Machinability Rating	100%
Suitability for soldering	Excellent
Suitability for Brazing	Good
Uses
Precision Components, Hardware, Hinges, Lock Bodies, Screws, Nuts & Bolts

Chemical Requirements		Grade II		Grade III
Copper		60.0 – 63.0%		60.0 – 63.0%
Lead		2.50 to 3.70%		0.50 to 1.50%
Iron		0.35% max		0.20% max
Total Imp. Excl. Iron		0.50% max		0.50% max
Zinc		Remainder		Remainder
Physical Properties
Condition	Size	T.S. T.S. MPA	EL% Min	T.S. MPA	EL% Min
Annealed (O)	6-25 25-50 50 above	355 305 275	15 20 25	315 285 255	22 27 32
Half-Hard (HB)	6-12 12-25 25-50 50 above	395 385 345 315	7 10 15 20	355n 345 305 285	8 12 22 27
Hard (HD)	6-12 12-25	550 485	4	460 400	4
Fabrication Properties
Capacity for being
Cold worked		Poor		Fair
Hot formed		Fair		Excellent
Machinability Rating		90%		80%
Suitability for soldering		Excellent		Excellent
Suitability for Brazing		Good		Excellent
Uses
Gr II : Gear, Pinions, Precision, Automobile, Electronic Parts
Gr III : Precision Components Machining with Riveting Operation

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