Description: AFM Aluminum Bronze A2 is used for joining aluminum bronzes of similar composition, high strength copper-zinc alloys, silicon bronzes, manganese bronzes, some nickel alloys, many ferrous metals and alloys, and combinations of dissimilar metals. It is also suitable for surfacing wear- and corrosion-resistant bearing surfaces. It is used only in the flat position.
Applications: For butt joints, a 90 degree single V-groove is recommended for plate thicknesses up to and including 7/16 in. (11 mm), and a modified U- or double V-groove is recommended for the heavier plate thicknesses. Preheat and interpass temperature should be as follows: For iron-base materials, 200 to 300━F (95 to 150━C). For bronzes, 300 to 400━F (150 to 210━C). For brasses, 500 to 600━F (260 to 315━C).
Chemical Composition Requirements (%):
| ( AL ) |
Aluminum |
8.5 to 11.0 |
| ( Cu ) |
Copper |
BAL * |
| ( Fe ) |
Iron |
1.50 |
| ( Pb ) |
Lead |
0.02 |
| ( Si ) |
Silicon |
0.10 |
| ( Zn ) |
|
0.02 |
|
All Other |
0.50 |
*including Silver (Ag)
**including Cobalt (Co)
a. These elements must be included in Total Other elements.
All values are considered maximum, unless other-wise noted.
Mechanical Property Requirements (min.):
- Tensile Strength, psi - 60,000
- MPa - 414
- Brinell Hardness (GTAW only) - 130 to 150
Standard Sizes: 3/32 (2.4), 1/8 (3.2), 5/32 (4.0), 3/16 (4.8)
