AWS A5.8 RBCuZn-A
Copper-Zinc Filler Metals for Brazing, Welding Wire — RBCuZn-A
RBCuZn-A
RBCuZn-A is used on steels, copper, copper alloys, nickel, nickel alloys, and stainless steel when corrosion resistance is not of importance. It is used with torch, furnace, and induction brazing processes. Fluxing is generally required, and a borax-boric acid type flux is commonly used. Joint clearances from 0.002 in. to 0.005 in. [0.05 mm to 0.13 mm] are suitable.
| Nominal Chemical Composition (%) | Melting Point | Flow Point | Brazing Temperature | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cu | Zn | Sn | Fe | Mn | Ni | P | Pb | Al | Si | TOEa | °F | °C | °F | °C | °F | °C |
| 57.0-61.0c | BAL | 0.25-1.00 | * | * | – | – | 0.05* max | 0.01* max | * | 0.50 maxb | 1630 | 888 | 1650 | 899 | 1670-1750 | 910-954 |
a The filler metal shall be analysed for those specific elements for which values or asteriks (*) are shown in this table. If the presence of other elements is indicated in the course of this work, the amount of those elements shall be determined to ensure their total does not exceed the limit specified in “Total Other Elements, TOE.”
b The total of all other elements, including those for which a maximum value or an asterisk (*) is shown, shall not exceed the value specified in “Total Other Elements, TOE.”
c Includes residual silver.
d Includes residual cobalt.