bercoweld A8 (AlBz8)

Range of application

CuAl alloys, for example Al-bronze with 7-9% Al, copper and copper alloys. As a first layer for weld surfacing on low and unalloyed steels as well cast iron, pulsed arc welding is recommended. It is very resistant to corrosion and wear. Preheating is recommended for large work pieces.

Standard designation

ISO 24373	Cu Al 8 Cu6100
DIN 1733 Mat. no. 2.0921	SG-CuAl8
BS 2901P.3	C12
AWS A5.7-84	ERCuAl-A1

Composition (weight %)

Cu	balance
Al	7,50-8,00
Mn	0,10-0,30
Ni	0,10-0,50
Others	max. 0,5

Physical standard data

Density	kg/dm3	7,7
Melting range	°C	1030-1040
Thermal conductivity	W / m x K	65
Coefficient of linear mean expansion	1/K	17 x 10-6
Electrical conductivity	m / Ω x mm2	7-9
Resistivity	Ω x mm2 /m	0,11-0,143

Mechanical properties of the weld joint, standard data

Heat treatment		non treated
Tensile strength	N/mm2	430
Elongation	%	40
Brinell hardness	HB 2,5/62,5	100
Notched bar impact test	Av (J)	100

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