ASTM B16 / B16M
This specification establishes the requirements for freecutting brass rod, bar, wire, and shapes of any specified cross section produced from Copper Alloy UNS Nos. C36000 or C36010 suitable for high-speed screw machining applications and moderate thread rolling.
Chemical Properties
| Copper Alloy UNS No. | Copper | Lead | Iron, max | Zinc |
|---|---|---|---|---|
| C36000 | 60.0 - 63.0 | 2.5 - 3.0 | 0.35 | Remainder |
| C36010 | 60.0 – 63.0 | 3.1 – 3.7 | 0.35 | Remainder |
Mechanical Properties, [inch-pound]
| Temper Designation Standard Name | Material Conditions | Diameter or Distance Between Parallel Surfaces, in. | Tensile Strength,min, ksi | Yield Strength at 0.5 % Extension under Load, min, ksi | Elongation,A min, % | |
|---|---|---|---|---|---|---|
| O60 | soft anneal | 1 and under | 48 | 20 | 15 | |
| over 1 to 2, incl. | 44 | 18 | 20 | |||
| over 2 | 40 | 15 | 25 | |||
| H02 | half-hard | 1⁄2 and under | 57 | 25 | 7B | |
| over 1⁄2 to 1, incl. | 55C | 25 | 10 | |||
| over 1 to 2, incl. | 50 | 20 | 15 | |||
| over 2 to 4, incl., and | 45 | 15 | 20 | |||
| over 4 | 40 | 15 | 20 | |||
| H04 | hard | 1⁄16 to 3⁄16 incl. | 80 | 45 | ... | |
| over 3⁄16 to 1⁄2 incl. | 70 | 35 | 4 | |||
| over 1⁄2 to 3⁄4 incl. | 65 | 30 | 6 | |||
| Bar | ||||||
| Standard Name | Material Conditions | Thickness, in. | Width, in. | Tensile Strength,min, ksi | Yield Strength at 0.5 % Extension under Load,min, ksi | Elongation,A min, % |
| O60 | soft anneal | 1 and under | 6 and under | 44 | 18 | 20 |
| over 1 | 6 and under | 40 | 15 | 25 | ||
| H02 | half-hard | 1⁄2 and under | 1 and under | 50 | 25 | 10 |
| 1⁄2 and under | over 1 to 6, incl. | 45 | 17 | 15 | ||
| over 1⁄2 to 2, incl. | 2 and under | 45 | 17 | 15 | ||
| over 1⁄2 to 2, incl. | over 2 to 6, incl. | 40 | 15 | 20 | ||
| over 2 | over 2 to 4, incl. | 40 | 15 | 20 | ||
Note:
A In any case, a minimum gage length of 1 in. shall be used.
B For product furnished in coils the elongation shall be 4 % min.
C If product is specified for thread rolling applications, the minimum tensile strength shall be 52 ksi.
Mechanical Properties, [SI]
| Temper Designation Standard Name | Material Conditions | Diameter or Distance Between Parallel Surfaces, in. | Tensile Strength,min, ksi | Yield Strength at 0.5 % Extension under Load, min, ksi | Elongation,A min, % | |
|---|---|---|---|---|---|---|
| O60 | soft anneal | 25 and under | 330 | 140 | 15 | |
| over 25 to 50, incl. | 305 | 125 | 20 | |||
| over 50 | 275 | 105 | 25 | |||
| H02 | half-hard | 12 and under | 395 | 170 | 7B | |
| over 12 to 25, incl. | 380C | 170 | 10 | |||
| over 25 to 50, incl. | 345 | 140 | 15 | |||
| over 50 to 100, incl., and | 310 | 105 | 20 | |||
| over 100 | 275 | 105 | 20 | |||
| H04 | hard | 1.6 to 4, incl. | 550 | 310 | ... | |
| over 4 to 12, incl. | 480 | 240 | 4 | |||
| over 12 to 18, incl. | 450 | 205 | 6 | |||
| Bar | ||||||
| Standard Name | Material Conditions | Thickness, mm | Width, mm | Tensile Strength, min, MPa | Yield Strength at 0.5 % Extension under Load, min, MPa | Elongation,A min, % |
| O60 | soft anneal | 25 and under | 150 and under | 305 | 125 | 20 |
| over 25 | 150 and under | 275 | 105 | 25 | ||
| H02 | half-hard | 12 and under | 25 and under | 345 | 170 | 10 |
| 12 and under | over 25 to 150, incl. | 310 | 115 | 15 | ||
| over 12 to 50, incl. | 50 and under | 310 | 115 | 15 | ||
| over 12 to 50, incl. | over 50 to 150, incl. | 275 | 105 | 20 | ||
| over 50 | over 50 to 100, incl. | 275 | 105 | 20 | ||
Note:
A In any case, a minimum gage length of 25 mm shall be used. SI elongation values are based on a gage length of 5.65 times the square root of the area for dimensions greater than 2.5 mm.
B For product furnished in coils the elongation shall be 4 % min.
C If product is specified for thread rolling applications, the minimum tensile strength shall be 350 MPa.
