Physical Properties Class 3 and 4
Alloy Physical Properties
Minimum Physical Properties for Copper Alloys Class 3 & 4
| GROUP A COPPER BASE ALLOYS * | HARDNESS ROCKWELL (HRB/HRC) ** | CONDUCTIVITY% I.A.C.S. *** | ULTIMATE TENSILE STRENGTH ksi | YIELD STRENGTH ksi 0.2% OFFSET | ELONGATION % IN 2” OR 4 DIAMETERS | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| SIZE RANGE | CLASS | CLASS | CLASS | CLASS | CLASS | ||||||
| IN | MM | CLASS 3 C18000 C17150 |
CLASS 4 C17200 |
CLASS 3 C18000 C17150 |
CLASS 4 C17200 |
CLASS 3 C18000 C17150 |
CLASS 4 C17200 |
CLASS 3 C18000 C17150 |
CLASS 4 C17200 |
CLASS 3 C18000 C17150 |
CLASS 4 C17200 |
| DIAMETER—ROUND ROD STOCK (WROUGHT) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| UP TO 1” | UP TO 25 | 90 HRB | 33 HRC | 45% | 20% | 95 | 165 | 75 | 130 | 9% | 2.0% |
| OVER 1” TO 2” | OVER 25 TO 51 | 90 HRB | 33 HRC | 45% | 20% | 92 | 165 | 75 | 130 | 9% | 2.0% |
| OVER 2” TO 3” | OVER 51 TO 76 | 90 HRB | 33 HRC | 45% | 20% | 88 | 165 | 75 | 130 | 9% | 2.0% |
| OVER 3” TO 3-1/2” | OVER 76 TO 89 | 90 HRB | 33 HRC | 45% | 20% | 88 | 165 | 75 | 130 | 9% | 2.0% |
| OVER 3-1/2” TO 4” | OVER 89 TO 102 | 90 HRB | 33 HRC | 45% | 20% | 88 | 165 | 75 | 130 | 9% | 2.0% |
| OVER 4” TO 4-1/2” | OVER 102 TO 114 | 90 HRB | 33 HRC | 45% | 20% | 88 | 165 | 75 | 130 | 9% | 2.0% |
| THICKNESS - SQUARE, RECTANGULAR AND HEXAGONAL BAR STOCK (WROUGHT) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| UP TO 1” | UP TO 25 | 90 HRB | 33 HRC | 45% | 20% | 95 | 165 | 75 | 130 | 9% | 2.0% |
| OVER 1” | OVER 25 | 90 HRB | 33 HRC | 45% | 20% | 90 | 165 | 75 | 130 | 9% | 2.0% |
| ANNEALED MATERIAL **** | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ROUNDS | 20 HRB | 45 HRB | 20% - 45% | 15% - 28% | -- | -- | -- | -- | -- | -- |
| THICKNESS—FORGINGS | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| UP TO 1” | UP TO 25 | 90 HRB | -- | 45% | -- | 94 | -- | 50 | -- | 9% | -- |
| OVER 1” TO 2” | OVER 25 TO 51 | 90 HRB | -- | 45% | -- | 90 | -- | 50 | -- | 9% | -- |
| OVER 2” | OVER 51 | 90 HRB | -- | 45% | -- | 88 | -- | 50 | -- | 9% | -- |
| CASTINGS | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| ALL | ALL | 90 HRB | 33 HRC | 45% | 20% | 75 | 150 | 45 | 120 | 5% | 1.0% |
RWMA Table 1.8.4
Data extracted from RWMA Bulletin 16 Table 1.8.4
Note: Acceptance based on Hardness, Conductivity, Tensile Strength, Yield Strength and Elongation data is available for reference
* All materials are in the fully heat treated condition unless otherwise specified.
** Rod and bar to be tested at mid radius in accordance with ASTM test method E18.
*** Conductivity = 1/.0058 (Resistivity) where: Conductivity is expressed in the units % IACS and resistivity is expressed in the units mWcm.
**** Must meet the properties for RWMA heat treated material after age hardening.