bercoweld K5 (CSSM)

Range of application

Tin alloyed copper welding filler metal with good flowing properties – suitable for joining of OF-copper and copper materials subject to high strain– easily workable – welding seams without pores. For TIG welding of large work pieces preheating to 300°C is recommended.

Standard designation

ISO 24373	CuSn1 Cu1898
DIN 1733 Mat. no. 2.1006	SG-CuSn
BS 2901P.3	C 7
AWS A5.7-84	ERCu

Composition (weight %)

Cu	balance
Sn	0,75-0,90
Mn	0,15-0,30
P	0,005-0,020
Si	0,15-0,25
Others	max. 0,5

Physical standard data

Density	kg/dm3	8,9
Melting range	°C	1020-1050
Thermal conductivity	W / m x K	120-145
Coefficient of linear mean expansion	1/K	18,1 x 10-6
Electric conductivity	m / Ω x mm2	15-20
Resistivity	Ω x mm2 /m	0,05-0,0667

Mechanical properties of the weld joint, standard data

Heat treatment		non treated
Tensile strength	N/mm2	220
Elongation	%	30
Brinell hardness	HB 2,5/62,5	60
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