Description: AFM Deoxidized Copper is generally used for the welding of deoxidized and elecrolytic tough pitch copper. Reactions with hydrogen in oxygen-free copper, and the segregation of copper oxide in tough pitch copper may detract from joint efficiency. It can be used to weld these base metals when the highest quality is not required.
Applications: For thick base metals, gas metal arc welding (GMAW) is preferred. Conventional joint designs consistent with good welding practice are generally satisfactory. An external source of preheating generally is not needed when welding base metal 1/4¡± (6.4mm) and thinner in thickness. Preheating in the range of 400 to 1000¨¬F (205 to 540¨¬C) is desirable when welding base metal thicker than 1/4¡± (6.4mm) if high-quality welds are to be obtained.
Chemical Composition Requirements (%):
| ( Cu ) |
Copper |
98.0 min. * |
| ( Mn ) |
Manganese |
1.0 |
| ( P ) |
Phosphorus |
0.15 |
| ( Pb ) |
Lead |
0.02 |
| ( Si ) |
Silicon |
0.50 |
| ( Sn ) |
Tin |
1.0 |
| All Other |
0.50 |
*including Silver (Ag)
All values are considered maximum, unless other-wise noted.
Hardness and Tensile Strength:
- Minimum Tensile Strength, psi - 25,000
- MPa - 172
- Brinell Hardness, Rockwell F - 25
(average value for an as-welded deposit)
Standard Sizes: .035 (0.9), .045 (1.2), 1/16 (1.6), 3/32 (2.4), 1/8 (3.2)
