Flux-Cored Wire

Indium Corporation is quickly becoming known as one of the highest quality, full line suppliers of flux-cored wire solder. Indium Corporation uses only “conflict-free” and grade A (per ASTM B32) metals, as well as other high purity metals for its flux-cored wire. Our materials have been tested and certified to meet IPC J-STD-004B and other relevant industry specifications, including the legacy military specification QQ-S-571f. Indium Corporation’s flux-cored wire is well known for its:

• evenly layer winding
• low oxide shiny appearance over time
• non-offensive odor for the 800 series and 200 series fluxes

Core Flux Formulas

Flux Number	J-STD- 004	J-STD- 004B	QQ-S- 571f	Halogen Content	JIETA ET-7304 Halogen Free	Residue	Residue Removal	Preferred Alloys	Application/ Comments
CW-102	ROL0	ROL0	"R"	< 50 ppm	Yes	light amber	NC, So, Sa*	SnPb, Pb-Free	Military type "R" for legacy applications, very low activity
Core 92	ROL0	ROL0	"RMA"	< 50 ppm	Yes	light amber	NC, So, Sa*	SnPb	Low activity, RMA based on SMQ92J paste technology
CW-802	ROL0	ROL0	"RMA"	< 50 ppm	Yes	colorless	NC, So, Sa*	SnPb, Pb-Free	No halogen added, low activity, no-clean
CW-807	ROL0	ROL0	"RMA"	< 500 ppm	Yes	colorless	NC, So, Sa*	SnPb, Pb-Free	General purpose electronics soldering
CW-807M	ROL0	ROL1	"RMA"	< 1500 ppm	Yes	colorless	NC, So, Sa*	SnPb, Pb-Free	Hard-to-solder, general purpose electronics applications
CW-807 HMP	ROL0	ROL0	"RMA"	< 500 ppm	Yes	light amber	NC, So, Sa*	High Pb containing	High temperature, mildly active, modified rosin for high-lead containing alloys
CW-501	REL0	REL1	N/A	> 1500 ppm as Br	No	colorless	NC, So, Sa*	Pb-Free	Higher activity, modified rosin core for electronics
Core 230	ROL1	ROL1	N/A	> 1500 ppm as Br	No	dark amber	NC, So, Sa*	Pb-Free	Higher activity, rosin core for electronics
CW-201	ROM1	ROM1	"RA"	< 0.5%	No	light amber	So, SA, NCH	SnPb	Electrical application, will solder copper, brass, nickel, etc.
CW-207	ROM1	ROM1	"RA"	< 0.5%	No	colorless	So, SA, NCH	Pb-Free	Electrical application, will solder oxidized copper, brass, nickel ,etc.
CW-209	ROM1	ROM1	"RA"	< 1.0%	No	colorless	So, SA, NCH	SnPb, Pb-Free	Electrical application, will solder oxidized copper, oxidized brass, nickel, etc.
CW-301	ORH1	ORH1	"OR"	~3.0%	No	amber	water	SnPb, Pb-Free	Water washed electronics applications
CW-901	N/A	N/A	"IA"	> 3.0%	No	white	water/ neutralizer	SnPb, Pb-Free	Inorganic acid, water wash flux for stainless steel and aluminum

NC=No-clean
So= Solvent
Sa= Saponification
NCH= No-clean for non-sensitive non-electronic applications

Diameter	0.120"	0.062"	0.040"	0.032"	0.025"	0.020"	0.015"	0.010"
cross- section (sq in)				0.0008041984	0.00049084375	0.00031414	0.00017670375	0.000078535
in/lb 63/37				4152	6802	10629	18895	42514
ft/lb 63/37				346	567	886	1575	3543
ft/lb SAC 305					643	1005	1787	4021

Standard Diameters and Packaging

Inches	mm equiv.	Tolerance	Packaging	Cartons
0.010"	0.25	± 0.002"	1/4 lb.	10 - 1/4 lb. spools
0.015"	0.38	± 0.002"	1/4 lb., 1 lb.	10 - 1 lb. spools
0.020"	0.50	± 0.002"	1 lb.	10 - 5 lb. spools
0.025"	0.63	± 0.002"	1 lb.	per box
0.032"	~ 0.75	± 0.002"	1 lb.
0.040"	1.0	± 0.002"	1 lb., 5 lb.
0.062"	~ 1.5	± 0.002"	1 lb., 5 lb., 20 lb.	2 - 20 lb spools
0.120"	3.0	± 0.002"	1 lb., 5 lb., 20 lb.	per box

Alloys, Flux Percent by Weight, and Shelf Life

Alloys	High Flux %	Medium Flux %	Low Flux %	Very Low Flux %	Shelf Life (< 26°C & < 60%RH)
SnPb < 80% Pb	2.7 - 3.2%	1.7 - 2.2%	0.8 - 1.2%		3 years
Pb-Free Alloys	3.3 - 3.7%	2.7 - 3.2%	1.7 - 2.2%	0.8 - 1.2%	3 years
High Lead > 80%	1.7 - 2.2%	1.3 - 1.7%	0.8 - 1.2%		1 year

Flux percent is measured by weight. The volume of flux compared to the weight percent varies with the density of the alloy.

*Indium Corporation can produce many of the alloys on its alloys list as cored wire. Alloys containing greater than 20% bismuth, greater that 8% antimony, or greater than 5% silver cannot be produced as flux-cored wire at this time.