Free Cutting Brass 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

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. 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

7
10
15
20

355
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