Gas Welding, Brazing and Soldering
8 Brazing
Cd Free Classification AS / NZS 1167.1–A18
ProSilver 34T This alloy was developed as the cadmium-free replacement for ProSilver 34. Suitable for carbon and low alloy steels, copper and copper alloys (aluminium bronzes with more than 2% aluminium require special flux), nickel and nickel alloys, and stainless steels (not exposed to continuous contact with water). Due to its wide melting range, this alloy can be used to fill joint gaps that can not be closely controlled.
Chemical Composition, wt% Silver Copper Zinc Tin
33.00–35.00 35.00–37.00 25.50–29.50 2.50–3.50
Physical Properties Density Solidus Liquidus Brazing Temp.
8.71 g / cc 630°C 730°C 730–780°C
Application
It should not be quenched from high temperatures (>300°C). It should also not be quenched when used to braze components with widely differing coefficients of thermal expansion, due to risks with cracking.
Suitable Flux Optimum Joint Gap
Tenacity 4A, Easyflo 0.075–0.2 mm
It is suitable for continuous service operating temperatures up to 200°C.
Wire Size (mm)
Pack Size
Part No.
1.5 x 750 2.5 x 750 1.5 x 750
0.5 (kg) 0.5 (kg) Single rod
LTAT3401 LTAT3403 LTAT3492
Packaging Data
Classification
AS / NZS 1167.1–A19
ProSilver 45T
Chemical Composition, wt% Silver Copper Zinc Tin
44.00–46.00 26.00–28.00 23.50–27.50 2.00–3.00
This alloy was developed as the cadmium-free replacement for ProSilver 45.
Physical Properties Density Solidus Liquidus Brazing Temp.
9.2 g / cc 640°C 680°C 680–710°C
Application Suitable Flux Optimum Joint Gap
Easyflo, Tenacity 4A 0.05–0.15 mm
It is suitable for carbon and low alloy steels, copper and copper alloys (aluminium bronzes with more than 2% aluminium require special flux), nickel and nickel alloys, and stainless steels for food and medical applications (not exposed to continuous contact with water). Low brazing temperature, coupled with a narrow melting range, makes it free flowing and produces joints with small, smooth fillets. Good corrosion resistance. Used widely in marine applications due to its resistance to dezincification. Suitable for continuous service operating temperatures up to 200°C.
Packaging Data Wire Size (mm) 1.5 x 750 2.5 x 750 1.5 x 750
Pack Size 0.5 (kg) 0.5 (kg) rod
Part No. LTAT4501 LTAT4503 LTAT4592X
WARNING Welding can give rise to electric shock, excessive noise, eye and skin burns due to the arc rays, and a potential health hazard if you breathe in the emitted fumes and gases. Read all the manufacturer’s instructions to achieve the correct welding conditions and ask your employer for the Materials Safety Data Sheets. Refer to www.boc.com.au or www.boc.co.nz
NZ : IPRM 2007 : SECTION 8 : CONSUMABLES
387