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Technical Data Sheet
Multicore X39
September 2007
NO CLEAN CORED SOLDER WIRE FLUX
Properties of Multicore X39 solid flux for cored
solder wires:
x No clean
x Low residue
x Eliminates cost of cleaning
x Halide free
x Non-corrosive formulation
x Negligible residues
x Fast Soldering on copper and brass
PRODUCT RANGE
Multicore X39 cored wires are manufactured as
standard with a nominal flux content of 1%.
Multicore X39 cored wires are available in a variety of
alloys conforming to J-STD-006 and EN 29453 or
alloys conforming to similar national or international
standards. For details refer to document “Properties of
Alloys used in Cored Solder Wires ”. A wide range of
wire diameters is available.
TECHNICAL SPECIFICATIONS
A full description of test methods and detailed test
results are available on request.
Alloys: The alloys used for Multicore flux cored solder
wires conform to the purity requirements of the
common national and international standards. A wide
range of wire diameters is available manufactured to
close dimensional tolerances. For details refer to
document “Properties of Alloys used in Cored Solder
Wires ”.
Flux: Multicore X39 solid flux is based on modified
rosins and halide free carboxylic acid activators. In use
it has a mild rosin smell and leaves a small quantity of
clear residue. It may be classified as RO L0 according
to J-STD-004 (January 1995), LR3CN according to
IPC-SF-818 or DIN F-SW32 according to DIN 8511. It
meets the requirements of Bellcore TR-NWT-000078
issue 3 (December 1991).
FLUX PROPERTIES
TEST RESULT
Acid value 215mg KOH/g
Halide content Zero
Copper mirror Pass
Chromate paper Pass
Corrosion J-STD-004 Pass
Test IPC-SF-818 Pass (10 days)
BS 5625 Pass
DTD 599A Pass
DIN 8516 Pass
JIS-Z-3197 Pass
SPECIAL PROPERTIES
The uncleaned residues PASS SIR testing to the
Bellcore TR-NWT-000078 issue 3 (December 1991)
and IPC Class 1,2 and 3 protocols. They also pass the
electromigration test specified by Bellcore TR-NWT-
000078.
BELLCORE TR-NWT-000078 ISSUE 3
SIR TEST RESULTS ON UNCLEANED COMBS
Test conditions 35°C, 85% RH
Test time, h 24 96
Surface insulation
resistance, ohms 3.17 x 10
11
3.52 x 10
11
Passmark, ohms - 10
11
IPC-SF-818
SIR TEST RESULTS ON UNCLEANED COMBS
Test conditions 85°C, 85% RH
Test time, h 0 24 96 168
Surface insulation
resistance, ohms
1.63 x
10
12
1.68 x
10
9
3.37 x 10
9
3.43 x 10
9
Passmark, ohms - 10
8
10
8
10
8
BELLCORE TR-NWT-000078 ISSUE 3
ELECTROMIGRATION TEST RESULTS ON UNCLEANED COMBS
Test conditions 85°C, 85% RH
Test time, h 96 500
Bias, V (DC) No bias 10
Surface insulation
resistance, ohms
1.16 x 10
9
5.43 x 10
9
Unfluxed control, ohms 5.09 x 10
9
8.91 x 10
9
NOT FOR PRODUCT SPECIFICATIONS
THE TECHNICAL INFORMATION CONTAINED HEREIN IS INTENDED FOR REFERENCE ONLY. PLEASE CONTACT HENKEL
TECHNOLOGIES TECHNICAL SERVICE FOR ASSISTANCE AND RECOMMENDATIONS ON SPECIFICATIONS FOR THIS
PRODUCT.
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