EXCELLENT SOLDERABILITY & LOW GENERATION OF SOLDER DROSS

Features

  • Smooth & shinning surface
  • Low lead impurity
  • Good fluidity
  • Low generation of solder dross
  • High mechanical strength
  • Low aggressive to solder pot material
     

 


3 common type alloys for lead free wave soldering:-

  • SnAgCu
  • SnCuP
  • SnCuNi

 

Alloy Code

Alloy Family

Features

G220
G214

G227P
G230P

G226
G235

Sn96.5Ag3Cu0.5
Sn97Ag3
Sn99.3Cu0.7P
Sn99.8Cu0.2P
Sn99.3Cu0.7Ni
Sn99.9Ni

Recommended for all wave soldering. Good solderability.
Top up alloy for G220 to reduce copper % when exeeding 0.75%.

Cost effective alloy but higher temperature & poor solderability.
Top up alloy for G227P to reduce copper % when exceeding 0.9%.

Good fluidity & low generation of solder dross.
Top up alloy for G226 to reduce copper % when exceeding 0.90%.

 

Recommended Setting

SnAgCu

SnCuP

SnCuNi

Soldering temperature (°C)
Soldering time (sec)
Pre-heat temperature (°C)

245-255
3-4
100-120

250-260
3-4
110-130

250-260
3-4
110-130

Typical temperature profile for wave soldering


Standard Packaging
 

(a) Solder bar

  • 500.0gm per bar
  • 40 pieces of bar with 20.0kg per carton box

(b) Solid wire

  • 20.0kg per high density of polyethylene bobbin

 

Copper Content In Lead Free Wave Soldering

Dissolution rate of copper content depends on

  • Solder temperature
  • Copper content in lead free alloys
  • Copper finishes on PCB

Contamination of copper above 1% has a potential to affect process and joint quality

  • Formation of Cu6Sn5 as solder dross
  • Transition from eutectic to pasty state

At 250°C temperature
Normal lead free alloys

G-Series alloys

 

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