ALPHA® Flux Coated Preforms

For Exactalloy® Solder Preforms

Flux coated Exactalloy® preforms offer a significant increase in productivity in processes requiring flux. Rosin based formulas are available in a full range of activity levels (see flux overview and classification chart). With Alpha’s unique glazing process, flux coatings can be fused into a clear, continuous surface, highly resistant to flaking and flux loss during storage and handling. The external flux coating is designed to become active prior to the complete melting of the solder preform. It flows to cover the solder preform during its transformation from solid to liquid, while providing wetting action for the substrates being soldered.

Compared to flux filled preforms, by the vary nature that the flux is already available at the place of need, the flux coated preforms provide the flux earlier in the soldering process to the area where it is designed to do its work. Highly specialized flux formulas are also available that feature clear, colorless residues and flexible coatings, enabling bending or folding of the fabricated preform after the flux has been applied. Another key consideration is the low flux weight percent required to yield good solder wetting. Flux percentages ranging from .25% to 1.5% are sufficient for most preform applications. The result is lower levels of residual flux in no clean applications versus solder paste applications.


Washer

solder preform washer

OD
Min = .020" (0.51mm)
Max = 3.00" (76.0mm)

ID
Min = .008" (0.2mm)
Max = OD - .010" (0.25mm)

T (Thickness)
Min = .002" (0.05mm)
Max = .110" (2.80mm)

Rectangle

square solder preform

S (Side)
Min = .020" (0.51mm)
Max = 2.30" (58.0mm)

T (Thickness)
Min = .002" (0.05mm)
Max = .200" (5.00mm)

Disc

solder preform disk

D (Diameter)
Min = .020" (0.51mm)
Max = 2.10" (53.0mm)

T (Thickness)
Min = .002" (0.05mm)
Max = .200" (5.00mm)
 

Sleeve

solder preform washer

OD
Min = .057" (1.44mm)
Max = 1.05
" (26.60mm)

ID
Min = .049" (1.20mm)
Max = 1.024" (26.60mm)

H (Height)
Min = .024" (0.61mm)
Max = .472" (12.00mm)
 

 

 
  
*
(Press ctrl to select multiple)
*