bercoweld S2 (COMAS)

Latest development for automotive applications!

Range of application

This welding filler metal is particularly recommended for the use of coated sheets for the car industry. Good flowing properties of weld pool, no tendency to porosity and spatter. Suitable for welding of Cu and Cu-alloys as well as low and unalloyed steels and cast iron.

MIG – pulsed-arc welding is recommended.
WIG – for sheets thicker than 3,00 mm preheating to apprx. 250-300 °C is recommended.

Standard designation

ISO 24373	CuSi2Mn1 Cu6511

Composition (weight %)

Cu	balance
Si	1,70-1,90
P	0,008-0,012
Mn	0,90-1,10
Sn	0,17-0,25

Physical standard data

Density	kg/dm3	8,7
Melting range	°C	1030-1050
Thermal conductivity	W / m x K	40
Coefficient of linear mean expansion	1/K	18,1 x 10-6
Electric conductivity	m / Ω x mm2	4,7-5,3
Resistivity	Ω x mm2 /m	0,188-0,213

Mechanical properties of the weld joint, standard data

Heat treatment		non treated
Tensile strength	N/mm2	285
Elongation	%	45
Brinell hardness	HB 2,5/62,5	62
Notched bar impact test	Av (J)	75

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