ISO 15608 Material Group 32.2:
Copper-zinc alloys, complex
BRASS
The „alpha-beta brasses“, „duplex brasses“ or „hot working brasses“, usually contain between 38% and 42% zinc. In contrast to the alloys of the first group, their ability to be deformed at room temperature is more limited. They are, however, significantly more workable than the alpha brasses at elevated temperatures and can be extruded into bars of complex section, either solid or hollow, and hot forged in closed dies („hot stamped“) to complex shapes.
Approximately 1% tin is included in the composition of alloys traditionally known as admiralty brasses (C44300) and naval brasses (nominally 60/40 types, C46400). As their names indicate, these brasses were developed originally for seawater service, the tin being added to provide improved corrosion resistance. Nowadays aluminum brasses nominally Cu/21-24% Zn/2-3.5% Al plus arsenic or cobalt, C68700) have replaced admiralty brass for marine service, although admiralty brass is used for fresh water. Naval brass retains some important applications in seawater service.
Typical Copper-zinc alloys, complex ISO 15608 material group 32.2
| Name | Number | Standard | Product | Remarks |
|---|---|---|---|---|
| CuZn35Pb1 CuZn35Pb1 CuZn35Pb1 CuZn35Pb1 – – | CW600N CW600N CW600N CW600N C34000 C34000 | EN 1652 EN 12164 EN 12167 EN 12449 ASTM B-121 ASTM B-453 | Plate Rod Bar Seamless tube Rod Rod | – – – – – – |
| CuZn35Pb2 CuZn35Pb2 CuZn35Pb2 – | CW601N CW601N CW601N C34200 | EN 12164 EN 12167 EN 12449 ASTM B-121 | Rod Bar Seamless tube Rod | – – – – |
| CuZn38Pb1 CuZn38Pb1 CuZn38Pb1 – – – | CW607N CW607N CW607N C37000 C37000 C37000 | EN 12164 EN 12167 EN 12449 ASTM B-124 ASTM B-135 ASTM B-283 | Rod Bar Seamless tube Rod Tube Forging | – – – – – – |
| CuZn38Pb2 CuZn38Pb2 CuZn38Pb2 CuZn38Pb2 CuZn38Pb2 | CW608N CW608N CW608N CW608N CW608N | EN 1652 EN 12164 EN 12165 EN 12420 EN 12449 | Plate Rod Wrought forging stock Forgings Seamless tube | – – – – – |
| CuZn39Pb0,5 CuZn39Pb0,5 CuZn39Pb0,5 CuZn39Pb0,5 – | CW610N CW610N CW610N CW610N C36500 | EN 12164 EN 12165 EN 12167 EN 12420 ASTM B-171 | Rod Wrought forging stock Bar Forgings Plate & Sheet | – – – – ASME BPVC |
| CuZn39Pb3 CuZn39Pb3 CuZn39Pb3 – – | CW614N CW614N CW614N C38500 C38500 | EN 12164 EN 12165 EN 12420 ASTM B-124 ASTM B-171 | Rod Wrought forging stock Forgings Rod Seamless tube | – – – – – |
| CuZn40Pb2 CuZn40Pb2 CuZn40Pb2 CuZn40Pb2 – – | CW617N CW617N CW617N CW617N C37700 C37700 | EN 12164 EN 12165 EN 12449 EN 12420 ASTM B-124 ASTM B-171 | Rod Wrought forging stock Seamless tube Forgings Rod Seamless tube | – – – – – – |
| CuZn20Al2As CuZn20Al2As CuZn20Al2As CuZn20Al2As CuZn20Al2As – – – | CW702R CW702R CW702R CW702R CW702R C68700 C68700 C68700 | EN 1652 EN 1653 EN 12451 EN 12452 EN 12449 ASTM B-111 ASTM B-395 ASTM B-543 | Plate Plate for boilers Seamless tube for heat exchanger Seamless finned tube for heat exchanger Seamless tube Seamless condenser tube Seattles finned heat exchanger tube Welded tube | – – EN 13445-12 EN 13445-12 – ASME BPVC ASME BPVC ASME BPVC |
| CuZn28Sn1As – – – – – | CW706R CW706R C44300 C44300 C44300 C44300 C44300 | EN 12451 EN 12452 ASTM B-111 ASTM B-171 ASTM B-359 ASTM B-395 ASTM B-543 | Seamless tube for heat exchanger Seamless finned tube for heat exchanger Smls. tube Plate & Sheet Smls. tube Smls. tube Welded tube | EN 13445-12 EN 13445-12 ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| – – – – – | C44400 C44400 C44400 C44400 C44400 | ASTM B-111 ASTM B-171 ASTM B-359 ASTM B-395 ASTM B-543 | Smls. tube Plate & Sheet Smls. tube Smls. tube Welded tube | ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| CuZn30As – – – – – | CW707R C44500 C44500 C44500 C44500 C44500 | EN 12451 ASTM B-111 ASTM B-171 ASTM B-359 ASTM B-395 ASTM B-543 | Seamless tube for heat exchange Smls. tube Plate Smls. tube Smls. tube Welded tube | EN 13445-12 ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| CuZn38AlFeNiPbSn | CW715R | – | – | – |
| CuZn38Sn1AS | CW717R | – | – | – |
| CuZn39Sn1 CuZn39Sn1 CuZn39Sn1 – Naval Brass | CW719R CW719R CW719R C46400 C46400 | EN 1653 EN 12165 EN 12240 ASTM B-171 ASTM B-283 | Plate Wrought forging stock Forgings Plate Forgings | – – – ASME BPVC ASME BPVC |
| – | C46500 | ASTM B-171 | Plate | ASME BPVC |
| Mn Bronze | C67500 | ASTM B-283 | Forging | ASME BPVC |
| – – – | C68700 C68700 C68700 | ASTM B-111 ASTM B-395 ASTM B-543 | Smls. tube Smls. tube Welded tube | ASME BPVC ASME BPVC ASME BPVC |
CASTINGS | ||||
| CuZn37Pb2Ni1AlFe-C | CC753S-GM | EN 1982 | Perm. mould casting | – |
| CuZn39Pb1AlB-C | CC755S-GS CC755S-GP | EN 1982 | Perm. mould casting Pressure Die casting | – – |
| CuZn39Pb1AlB-B | CB755S | EN 1982 | Ingot | – |
| CuZn32Al2Mn2Fe1-C | CC763S-GS CC763S-GP | EN 1982 | Sand casting Pressure Die casting | – – |
| CuZn32Al2Mn2Fe1-B | CB763S | EN 1982 | Ingot | – |
| CuZn34Mn3Al2Fe1-C | CC764S-GS CC764S-GM CC764S-GZ | EN 1982 | Sand casting Perm. mould casting Centrif. casting | – – – |
| CuZn34Mn3Al2Fe1-B | CB764S | EN 1982 | Ingot | – |
| CuZn35Mn2Al1Fe1-C | CC765S-GS CC765S-GM CC765S-GZ CC765S-Gc | EN 1982 | Sand casting Perm. mold casting Centrif. casting Continous casting | – – – – |
| CuZn35Mn2Al1Fe1-B | CB765S | EN 1982 | Ingot | – |
| CuZn38Al-C | CC767S-GM | EN 1982 | Perm. mould casting | – |
| CuZn38Al-B | CB767S | EN 1982 | Ingot | – |