Stainless Steels: Brazing Materials
Selection Chart
AISI or Trade Designation (430)
| Principal Uses |
Decorative auto trim and
kitchen sinks |
| Recommended Brazing Filler
Metals |
Braze 630, Braze 404, Braze 559 |
| Recommended Fluxes** |
Handy Flux or Handy Flux Type B-1 |
| Recommended Iner-type
Furnace Atmospheres*** |
Not necessary when flux is used. Dry hydrogen or
vacuum without flux (Braze 630 only) |
| Remarks |
Braze 630 prevents interface corrosion. See Handy
& Harman Technical Bulletin T-0. |
| Principal Uses |
Nitric Acid Tanks. |
| Recommended Brazing Filler
Metals |
Silver brazing not recommended. |
AISI or Trade Designation (446)
| Principal Uses |
Resistance to high
temperature scaling |
| Recommended Brazing Filler
Metals |
Braze 541 (700 F/370 C max. joint service or
Permabraze 130 (1500 F/815 C max. joint service) |
| Recommended Fluxes** |
Handy Flux Type B-1 (for Braze 541), Handy Hi-Temp
Flux Boron Modified, or none (for Permabraze 130) |
| Recommended Iner-type
Furnace Atmospheres*** |
None or dry hydrogen, vacuum |
| Remarks |
Flux required for brazing in air. Flux not required
in atmosphere. |
| Principal Uses |
Resistance to sulphur
bearing gases or compounds |
| Recommended Brazing Filler
Metals |
Permabraze 130 |
| Recommended Fluxes** |
Hi-Temp Flux Boron Modified, or none |
| Recommended Iner-type
Furnace Atmospheres*** |
Not necessary when flux is used. Dry hydrogen or
vacuum without flux (Braze 630 only) |
| Remarks |
Flux required for brazing in air. Flux not required
in atmosphere. |
AISI or Trade Designation (403, 410)
| Principal Uses |
Steam turbine blades |
| Recommended Brazing Filler
Metals |
Braze 630,Braze 403, Braze 404 |
| Recommended Fluxes** |
Handy Flux or Handy Flux Type B-1 |
| Recommended Iner-type
Furnace Atmospheres*** |
None or dry hydrogen |
| Remarks |
Braze 630 prevents interface corrosion. Braze 403 and
Braze 404 resist interface corrosion. See Handy &
Harman Technical Bulletin T-9. Flux sometimes used with
atmosphere in furnace brazing. |
| Principal Uses |
Jet engine compressor
blades |
| Recommended Brazing Filler
Metals |
Braze 541 |
| Recommended Fluxes** |
Handy Flux or Handy Flux Type B-1 |
| Recommended Iner-type
Furnace Atmospheres*** |
None or dry hydrogen |
| Remarks |
Braze 630 prevents interface corrosion. Braze 403 and
Braze 404 resist interface corrosion. See Handy &
Harman Technical Bulletin T-9. Flux sometimes used with
atmosphere in furnace brazing. |
AISI or Trade Designation (440A)
| Principal Uses |
Cutlery and surgical tools |
| Recommended Brazing Filler
Metals |
Braze 630 |
| Recommended Fluxes** |
Handy Flux or Handy Flux Type B-1 |
| Recommended Iner-type
Furnace Atmospheres*** |
None or dry hydrogen, vacuum without flux |
| Remarks |
Braze 630 prevents interface corrosion. See Handy
& Harman Technical Bulletin T-9. Cadmium-free brazing
alloys required for these uses. |
AISI or Trade Designation (17-4 PH and
15-7 Mo)
| Principal Uses |
Aircraft and missile
honeycomb panels |
| Recommended Brazing Filler
Metals |
Lithobraze 925 |
| Recommended Fluxes** |
None |
| Recommended Iner-type
Furnace Atmospheres*** |
Argon |
| Remarks |
Not subject to interface corrosion. May require
nickel plating prior to brazing. |
AISI or Trade Designation (17-4 PH)
| Principal Uses |
Aircraft and missile
components |
| Recommended Brazing Filler
Metals |
Lithobraze 720, Braze 505, Easy-Flo 3 and Braze 541 |
| Recommended Fluxes** |
None (with Lithobraze 720) Handy Flux or Handy Flux
Type B-1 (with Braze 505, Easy-Flo 3), Handy Flux Type
B-1 (with Braze 541) |
| Recommended Iner-type
Furnace Atmospheres*** |
Argon (with Lithobraze 720) None (with Braze 505,
Easy-Flo 3), None or dry hydrogen (with Braze 541) |
| Remarks |
Lithobraze 720 - Not subject to interface corrosion.
Braze 505, Easy-Flo 3 - For parts not subjected to
sustained high temperature service. Braze 541 - For
service up to 700 F(370 C) |
AISI or Trade Designation (AM-350)
| Principal Uses |
Aircraft panels |
| Recommended Brazing Filler
Metals |
Lithobraze 925 |
| Recommended Fluxes** |
None |
| Recommended Iner-type
Furnace Atmospheres*** |
Argon |
| Remarks |
Filler metals not subject to corrosion. |
| Principal Uses |
Aircraft Hydraulic tubing |
| Recommended Brazing Filler
Metals |
Lithobraze 720 |
| Recommended Fluxes** |
None |
| Recommended Iner-type
Furnace Atmospheres*** |
Argon |
| Remarks |
Filler metals not subject to interface corrosion. |
