We stock Refractory Metals in standard and custom cut sizes to meet your specific application needs. Available in Rod, Bar and Disc.
We additionally offer same day shipping to get them to you fast.
Getting you the products you need – when you need them, is what makes Resistance Welding Machine & Accessory stand apart from its competition.
RWMA CLASS 10
| RWMA CLASS 10 | RWMA No. | RWMA GENERAL USE * | RWMA DESCRIPTION |
|---|---|---|---|
| COPPER-TUNGSTEN | 10.74450 | Flash and butt welding electrodes where good electrical and thermal conductivity is necessary and where a degree of malleability is desired. | A powder metallurgical blend of 45% copper and 55% of the refractory metal tungsten. This combination produces dense, hard metals of superior wear resistance and strength at elevated temperatures. In addition, they possess good thermal and electrical conductivity. |
RWMA CLASS 11
| RWMA CLASS 11 | RWMA No. | RWMA GENERAL USE * | RWMA DESCRIPTION |
|---|---|---|---|
| COPPER-TUNGSTEN | 11.74400 | Flash and butt welding electrodes where good electrical and thermal conductivity is necessary and where a degree of malleability is desired. | A powder metallurgical blend of 25% copper and 75% of the refractory metal tungsten. This combination produces dense, hard metals of superior wear resistance and strength at elevated temperatures. In addition, they possess good thermal and electrical conductivity. |
RWMA CLASS 12
| RWMA CLASS 12 | RWMA No. | RWMA GENERAL USE * | RWMA DESCRIPTION |
|---|---|---|---|
| COPPER-TUNGSTEN | 12.74350 | Heavy duty projection welding electrodes, electro-forming and electo-forging electrodes facings for upsetting of studs and rivets, cross wire welding of large diameter wire and rod. | A powder metallurgical blend of 20% copper and 80% of the refractory metal tungsten. This combination produces dense, hard metals of superior wear resistance and strength at elevated temperatures. In addition, they possess good thermal and electrical conductivity. |
RWMA CLASS 13
| RWMA CLASS 13 | RWMA No. | RWMA GENERAL USE * | RWMA DESCRIPTION |
|---|---|---|---|
| TUNGSTEN | 13.74300 | Cross wire welding of copper and brass, resistance brazing and some upsetting. Welding of braided copper wire to other materials. | Tungsten is extremely hard and has low ductility. It cannot be machined with cutting tools but can be ground to required contours. It does not alloy with nonferrous materials. Tungsten has the highest melting point (3,422 °C, 6,192 °F) of all the metals. |
RWMA CLASS 14
| RWMA CLASS 14 | RWMA No. | RWMA GENERAL USE * | RWMA DESCRIPTION |
|---|---|---|---|
| MOLYBDENUM | 14.42300 | Cross wire welding of copper and brass, resistance brazing and some upsetting. Welding of braided copper wire to other materials. | Not as hard as Class 13 and can be drilled and machined to special contours. With relatively good thermal conductivity, molybdenum has a melting point of 2,623 °C (4,753 °F) and has one of the lowest coefficients of thermal expansion among commercially used metals. |
RWMA CLASS 20
| RWMA CLASS 20 | RWMA No. | RWMA GENERAL USE * | RWMA DESCRIPTION |
|---|---|---|---|
| DISPERSION STRENGTHENED COPPER | 20.15760 | Welding of metallic coated metal such as galvanized steel, terne plate, etc. | A dispersion of aluminum oxide within a copper matrix that exhibits good resistance to softening,and room temperature properties consistent with RWMA Class 2. |
