Brass
Chemical characteristics of the most common alloys
Simple brass
Alloy | Main components | Impurities % (max.) | Applications | |||||
Cu | Zn | Pb | Fe | Sum Others |
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min. | max. | |||||||
CuZn 15 | 84,5 | 85,5 | rest | 0,02 | 0,02 | 0,02 | Very deep drawing – Gold – Furniture – Jewelry | |
CuZn 30 | 69,5 | 70,5 | rest | 0,02 | 0,02 | 0,02 | Very deep drawing – Cups – Electrical connections | |
CuZn 33 | 66,5 | 67,5 | rest | 0,02 | 0,02 | 0,02 | Deep drawing – Cutting – Fitted | |
CuZn 36 | 63,0 | 65,5 | rest | 0,02 | 0,02 | 0,02 | Printing – Shirt – Cold Deformation |
Lead brass
Alloy | Main components | Impurities % (max.) | Applications | |||||
Cu | Pb | Zn | Fe | Sum Others |
||||
min. | max. | min. | max. | |||||
CuZn38 Pb2 | 59,5 | 62,5 | 1,0 | 3,0 | rest | 0,4 | 0,8 | Pieces with good machinability and small cold forming. |
CuZn39 Pb2 | 57,0 | 60,0 | 1,0 | 3,0 | rest | 0,6 | 0,8 | Hot forged parts. |
CuZn39 PB3 | 57,0 | 60,0 | 1,5 | 3,5 | resto | 0,6 | 0,8 | Machined parts. High-speed lathes. |
Simple brass
(due to the large dispersion from one manufacturer to another, the values are only indicative)
Denomination | Status | Thicknesses (mm) | Tensile strength (R) N/mm2 |
Elastic limit 0,2% N/mm2 | Minimum elongation % | Hardness | Grain size micras |
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Vickers HV | Brinell HB | ||||||||||||
min. | max. | A5 | A10 | min. | max. | min. | max. | min. | max. | ||||
CuZn38 Pb2 | |||||||||||||
F41 | Hard | – | min. 410 | min. 240 | 23 | 20 | 110 | 140 | 100 | 130 | – | – | |
CuZn39 Pb2 | |||||||||||||
F41 | Hard | – | min. 430 | min. 270 | 20 | 17 | 120 | 150 | 110 | 140 | – | – | |
CuZn39 PB3 | |||||||||||||
F43 | Hard | – | min. 430 | min. 270 | 20 | 17 | 120 | 150 | 110 | 140 | – | – |
1 N/mm2 = 0,102 kg/mm2
A = Longitudinal elongation, expressed in % of initial length after rupture of the specimen.
Comparative table of the most common alloys
Alloy | Spain UNE | Italy UNÍ | Germany DIN | France AFNOR | United Kingdom BS | E.E.U.U. ASTM | International ISO |
CuZn15 | CuZn15 | P-CuZn15 | CuZn 15 2.0240 |
U-Z15 A. 53603 |
CZ 102 | B36/B134 No. 230 |
CuZn 15 R 426 |
CuZn 30 | CuZn 30 | P-CuZn 30 | CuZn 30 | U-Z30 | CZ 105 CZ 106 |
B19/B36/B134 No. 260 | CuZn 30 R 426 |
CuZn 33 | CuZn 33 | P-CuZn 33 | CuZn 33 | U-Z33 A. 53603 |
CZ 107 | B36/B134 No 268/No 270 |
CuZn 33 R 426 |
CuZn 36 | CuZn 36 | P-CuZn 36 | CuZn 36 2.0320 |
U-Z36 A. 53603 |
CZ 108 | B36/B134 No 272/No 274 |
CuZn 37 R 426 |
CuZn38 Pb2 | CuZn38Pb2 | P-CuZn35 Pb2 | CuZn36 Pb1,5 2.0330 | U-Z35 Pb2 A. 51105 |
CZ 119 | B453 No. 353 |
CuZn36 Pb2 R 426 |
CuZn39 Pb2 | CuZn39 Pb2 | P-CuZn39 Pb2 | CuZn39 Pb2 2.0380 | U-Z39 Pb2 A. 51105 |
CZ 120 CZ 122 |
B124 No. 377 |
CuZn39 Pb2 R 426 |
CuZn39 Pb3 | CuZn39 Pb3 | P-CuZn40 Pb2 | CuZn40 Pb3 20405 | U-Z40 Pb3 A. 51105 |
CZ 121 | CuZn39 Pb2 R 426 |