Technical Data Sheet
Multicore X39
September 2007
NO CLEAN CORED SOLDER WIRE FLUX
Properties of Multicore X39 solid flux for cored
solder wires:
xNo clean
xLow residue
xEliminates cost of cleaning
xHalide free
xNon-corrosive formulation
xNegligible residues
xFast 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 1011 3.52 x 1011
Passmark, ohms - 1011
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
1012
1.68 x
1093.37 x 1093.43 x 109
Passmark, ohms - 108108108
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 1095.43 x 109
Unfluxed control, ohms 5.09 x 1098.91 x 109
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.
X3 X39, September 2007
RECOMMENDED OPERATING CONDITIONS
Soldering iron: Good results should be obtained using a
range of tip temperatures. However, the optimum tip
temperature and heat capacity required for a hand soldering
process is a function of both soldering iron design and the
nature of the task and care should be exercised to avoid
unnecessarily high tip temperatures for excessive times. A
high tip temperature will increase any tendency to flux
spitting and it may produce some residue darkening.
The soldering iron tip should be properly tinned and this
may be achieved using Multicore cored wire. Severely
contaminated soldering iron tips should first be cleaned and
pre-tinned using Multicore Tip Tinner Cleaner, then wiped
on a clean, damp sponge before re-tinning with Multicore
cored wire.
Soldering process: Multicore cored wires contain a
careful balance of resins and activators to provide clear
residues, maximum activity and high residue reliability,
without cleaning in most situations. To achieve the best
results from Multicore solder wires, recommended working
practices for hand soldering should be observed as follows:
xApply the soldering iron tip to the work surface,
ensuring that it simultaneously contacts the base
material and the component termination to heat both
surfaces adequately. This process should only take a
fraction of a second.
xApply Multicore flux cored solder wire to a part of the
joint surface away from the soldering iron and allow to
flow sufficiently to form a sound joint fillet – this
should be virtually instantaneous. Do not apply
excessive solder or heat to the joint as this may result
in dull, gritty fillets and excessive or darkened flux
residues.
xRemove solder wire from the work piece and then
remove the iron tip.
The total process will be very rapid, depending upon
thermal mass, tip temperature and configuration and the
solderability of the surfaces to be joined.
Multicore flux cored solder wires provide fast soldering on
copper and brass surfaces as well as solder coated
materials. The good thermal stability of Multicore fluxes
means they are also well suited to soldering applications
requiring high melting temperature alloys.
Cleaning: Multicore X39 flux cored wires have been
formulated to leave minimal quantities of flux residue and
to resist spitting and fuming.
Cleaning will not be required in most situations but if
necessary this is best achieved using Multicore MCF800
Cleaner (see separate technical data sheet). Other
proprietary solvent or semi-aqueous processes may be
suitable. Saponification may be viable but customers must
ensure that the desired level of cleanliness can be achieved
by their chosen system.
GENERAL INFORMATION
For safe handling information on this product, consult
the Material Safety Data Sheet, (MSDS).
Note
The data contained herein are furnished for information only and
are believed to be reliable. We cannot assume responsibility for
the results obtained by others over whose methods we have no
control. It is the user's responsibility to determine suitability for
the user's purpose of any production methods mentioned herein
and to adopt such precautions as may be advisable for the
protection of property and of persons against any hazards that
may be involved in the handling and use thereof. In light of the
foregoing, Henkel Corporation specifically disclaims all
warranties expressed or implied, including warranties of
merchantability or fitness for a particular purpose, arising
from sale or use of Henkel Corporation’s products. Henkel
Corporation specifically disclaims any liability for
consequential or incidental damages of any kind, including
lost profits. The discussion herein of various processes or
compositions is not to be interpreted as representation that they
are free from domination of patents owned by others or as a
license under any Henkel Corporation patents that may cover such
processes or compositions. We recommend that each prospective
user test his proposed application before repetitive use, using this
data as a guide. This product may be covered by one or more
United States or foreign patents or patent applications.
Americas
Henkel Corporation
15350 Barranca Parkway
Irvine, CA 92618 U.S.A.
949.789.2500
Europe
Henkel Loctite Adhesives Ltd
Technologies House, Wood Lane End
Hemel Hempstead
Hertfordshire HP2 4RQ, United Kingdom
+44 (0) 1442 278 000
Asia
Henkel Loctite (China) Co. Ltd
No. 90 Zhujiang Road
Yantai Development Zone
Shandong, China 264006
+86 535 6399820
All trademarks, except where noted are the property of Henkel Corp.
