bercoweld K3 (SF-Cu)

Range of application

Special copper wire for the production of coated electrodes. Appropriate to electric arc welding of copper, the joining of copper on steel, grey cast iron and nickel alloys of 3 mm wall thickness and more, particularly suitable for large work pieces.

Pulsed arc welding is recommended. Preheating of the base material is usually not required.

Standard designation

EN 13347	Cu-DHP CF 024A

Composition (weight %)

Cu	balance
P	0,05 - 0,07

Physical standard data

Density	kg/dm3	8,9
Melting range	°C	ca. 1080
Thermal conductivity	W / m x K	293-364
Coefficient of linear mean expansion	1/K	17,0 x 106
Electric conductivity	m / Ω x mm2	41-52
Resistivity	Ω x mm2 /m	0,0192-0,0244

Mechanical properties of the weld joint, standard data

Heat treatment		non treated
Tensile strength	N/mm2	220
Elongation	%	40
Brinell hardness	HB 2,5/62,5	50
Notched bar impact test	Av (J)	65

Delivery programme

Make-up	Weight/Length	Dimension
Drum / bedrabox	175 - 200 kg	0,80 - 1,60 mm
SD300 / BS300 / K300	12 - 15 kg	0,80 - 2,40 mm
H500 / H560 / H760	150 - 250 kg	0,80 - 2,40 mm
Coils	25 - 100 kg	1,60 - 6,00 mm
Rods	250 - 3000 mm	1,60 - 6,00 mm

Further make ups on request.

Recommended inert gas

Argon	4.8/ 5.0/ 5.3/ 5.6/ 6.0