1328 G

 

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DIN 1733                          S - Cu Sn 7

AWS/ ASME SFA - 5.6      E Cu Sn-C

 

Application / Properties: Thin-bronze electrode for joining welding and hard facing on copper and copper alloys. Also suitable, for hard facing of copper on steels, cast steel and grey cast iron. Particularly suitable for surfacing welds on bronze bearing in machine-building. Smooth running and good weld ability.

 

Weld metal analysis in % (typical values):

Cu	Sn	Mn	P
91	7.5	0.4	0.3

 

Mechanical Properties of all-weld metal :

(single values are typical values)

 

Tensile Strength (N/mm2)	Vickers hardness HV 30
approx 300-350	approx 70-100

 

Amperage:
2.0 Ǿ	2.5 Ǿ	3.25 Ǿ	4.0Ǿ
40-70	70-120	130-180	160-200

 

Caution: The lowest possible current must be set when applying the root pass during hard surfacing of ferrous

materials, so as to reduce the possibility of impurities in the bronze weld metal through the melting of the base

material to a minimum. The current setting should be slightly increased for the subsequent passes. The arc has

to be applied in circular fashion in order to ensure slow cooling process of the weld pool, i,e, the arc must

repeatedly recover the weld pool. Preheating the work piece can be of advantage. Joint welding is carried put with

high currents. The included angle should be 90C if possible. When butt welding ensure adequate air gap. Due to

the good heat conductivity of copper and its alloys. The weld zone must be preheated to 100-300C depending

on the degree of heat dissipation.

 

Materials: Thin-bronze materials, red brass and copper. Hard facing of copper on steel, cast steel and grey cast

iron.

 

 

 

Important : Use dry electrode only. Redring 300°C/2h.