Brass · COBYMA, copper and metal alloys

Alloys with copper minimum of 50% and main zinc addition. Usually have zinc contents among 5 and 46% and until 3% of lead to enhance its mechanization by take-off of shaving. They can also to carry other elements as aluminium, tin, silicon, iron or manganese to obtain special properties.

Designation	Chemical composition	Equiva- lence	Density	Tensile strenght (kg/mm²) R • F	Yield strenght R • F	Elongation R • F	Shear strength (kg/mm²) R • F
K-601	Cu 63% Zn 37%	DIN 17660 Ms-63	8,5	36 • 39-63	14 • 5-17	53 • 35-2	27 • 28-34
K-602	Cu57-59,5% Pb 1 to 3% Zn rest	DIN 17660 Ms-58	8,5	37 • 43	16 • 30	35 • 20-15	29 • 32
K-603	Cu 78% Zn 38% Al 2%	Brass DIN 17661 So Ms 76	8,35	37 •	14 •	55 •	28 •
K-604	Cu 61% Zn 38% Sn 1%	Brass DIN 17661 So Ms 60	8,40	40 •	17 •	40 •	29 •
K-605	Cu 64 Fe 2 Zn 27 Mn 2 Al 5	Brass DIN 17661 So Ms 64	8,75	60 • 74-84	32 • 60-73	25 • 20-10	-

Designation	Hardness R • F	Electric conduct. IACS	Applications
K-601	H/B 80 • 100-165 R/B 42 • 55-85	28	To give warm way and in cold bandy, riveted and emphasized.
K-602	H/B 95 • 90-145 R/B52 • 40-78	30	To mechanize with take-off of shaving. Easy stampation in soft state.
K-603	H/B 70-75 •	23	Pipes of condenser, of evaporeters and of heat changers.
K-604	H/B • R/B 49 •	26	Contruction of devices, especially for pipe backgrounds. Boat iron-works.
K-605	H/B 140 • 155-250 R/B 76 • 82	13	Pieces of very high resistance, especially with statics load.

R = Coved F = Forge

H/B = Hardness Brinell R/B = Hardness Rockwell B.

Supply: In round bars, squared and hexagonal; sheet, pipe, disks, angles and ts.

For any questions or queries we are at your disposal.