Copper Forging
Definition of a Copper Forging
In Copper forging process, a metal part is heated and formed into a predetermined shape between a set of dies. The process involves heating a metal slug and then pressing it into shape within a die cavity. Not only is the metal shaped, but the forging process also improves the mechanical and physical properties of the part. Forging today is performed on high-speed automatic equipment.
The forging process referred to throughout this publication is performed in presses, also identified as closed-die or impression die forging. While there are other methods of producing forgings, they are unlikely to yield parts suitable for current industrial products.
| SMALL FORGINGS (Weight up to 2 lbs. incl.)* | COPPER ALLOY NUMBERS | |||
|---|---|---|---|---|
| *For tolerances applicable to forgings weighing more than two (2) pounds, consult the forgings producer. Tolerances are plus and minus; if all plus or all minus are desired, double the values given. | C36500, C37700, C38500, C46400, C48200, C48500, C67500 |
C10200, C10400, C11000, C11300, C14500, C14700, C15000, C16200, C17000, C18200 |
C62300, C62400 | C63000, C63200, C65500, C67500 |
| Forging Types | ||||
| Solid | .008 | .010 | .010 | .012 |
| Solid, with symmetrical cavity | .008 | .010 | .010 | .012 |
| Solid, with eccentric cavity | .008 | .012 | .012 | .012 |
| Solid, deep extrusion | .010 | .012 | .012 | .014 |
| Hollow, deep extrusion | .010 | .012 | .012 | .014 |
| Thin section, short (Up to 6” incl.) | .010 | .012 | .012 | .014 |
| Thin section, long (Over 6” to 14” incl.) | .015 | .015 | .015 | .020 |
| Thin section, round | .010 | .012 | .012 | .014 |
| Draft Angles Outside and inside 1 ° to 5 ° |
½ ° | ½ ° | ½ ° | ½ ° |
| Matching Allowance (Min. on one surface) |
1/32 | 1/32 | 1/32 | 1/32 |
| Flatness (Maximum deviation per inch) |
.005 | .005 | .005 | .005 |
| Concentricity (Total indicator reading) |
.020 | .030 | .030 | .030 |
| Nominal Web Thickness Tolerance | 1/8 | 5/32 | 5/32 | 3/16 |
| 1/64 | 1/64 | 1/64 | 1/64 | |
| Nominal Fillet and Radius Tolerance |
1/16 | 3/32 | 3/32 | 1/8 |
| 1/64 | 1/64 | 1/64 | 1/64 | |
| Approximate Flash Thickness | 3/64 | 1/16 | 1/16 | 5/64 |
TOLERANCES (in inches) 
