Brazing & Soldering Products
Lucas-Milhaupt offers the most comprehensive inventory of alloys and forms in the industry and our expertise in brazing and soldering ensures that we can find the best-matched products for your needs.
Technical Documentation
Visit our knowledge base for MSDS and other technical documentation.
Copper Alloys
These copper brazing alloys have excellent corrosion resistance and high electrical and thermal copper conductivity. Copper is ductile, wets iron (Fe) well, and exhibits excellent joint penetration - capillary action. Lucas-Milhaupt stocks many copper filler metals including oxygen-free, ETP grade, and specialty alloys. These alloys can be provided multiple forms:
- Strip
- Wire
- Ring or four slide preforms
- Blanked washers
- Paste and powder
Furnace brazing in a protective atmosphere with copper braze filler metals is an economical option for brazing carbon and low alloy steels. Copper alloy brazing can be performed in both vacuum and atmospheric furnaces, and can be used to braze many different metals
Brazing relies on capillary action where the filler metal is drawn into the joint during the heating cycle. The strongest copper braze joints are made by maintaining tight joint clearances. Typical clearances are a press fit to 0.002" (0.05mm) when furnace brazing. Too large of a gap will result in a weaker braze joint.
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| Product | Solidus | Liquidus | Nominal Composition, % | AWS & International Standards | Technical Documents* | MSDS Safety Documents* | |||||||
| °F | °C | °F | °C | Cu | P | Sn | Zn | ||||||
| CDA 102 Joining of ferrous, Ni-base and Cu-Ni alloys. Free flowing. |
1981 | 1082 | 1981 | 1082 | 99.95 | ||||||||
| CDA 110 Joining of ferrous, Ni-base and Cu-Ni alloys. Free flowing for press fits. |
1981 | 1082 | 1981 | 1082 | 99.9 | BCu-1b | |||||||
| CDA 510 Use on steels where brazing temperatures lower than Cu are needed.
|
1750 | 953 | 1920 | 1048 | 95 | 0.3 | 4.7 | ||||||
| CDA 521 Use on steels where brazing temperatures lower than Cu are needed.
|
1620 | 881 | 1880 | 1026 | 92 | 0.3 | 7.7 | ||||||
| CDA 681 Joining of Fe, Cu and Ni alloys. Fluid alloy. |
1590 | 865 | 1630 | 887 | 60 | 40 | RBCuZn-C | ||||||
| Certified OFHC For furnace brazing of steel, SS and Ni based alloys.
|
1981 | 1082 | 1981 | 1082 | 99.99 | BVCu-1x | |||||||
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