Lastek B3040

Cadmium free silver brazing, good flowing

Cadmium free silver alloy, high silver content, good flowing properties and capillary.

For tougher joints and high strength.

Seawater resistant.

Joining unalloyed and low alloy steel, stainless steel, copper alloys, nickel alloys, cast iron.

Operating temperature, up to about 200 °C. // Melting range: 650-710 °C.

Lastek B3040 is cadmium free and applies to the European RoHS guideline and the European cadmium guideline.

Specifications & Usage


Machine parts for food and beverage industry.

Dairy and pharmaceutical industries.

Breweries and dairies.

Bronze and brass fittings.

Plumbing, piping, refrigeration, air treatment, instruments.


Lastek B3040 is also available as coated rod Lastek 3040V.


Joint preparation: optimum clearances 0.05 to 0.15 mm.

Preheat the work piece slightly with neutral flame. Preheat the brazing rod slightly and dip it into the flux. The flux will adhere to the rod. Rub the rod along the joint to apply the flux. As soon as the flux is flowing, melt the rod. Continue heating until the alloy flows into the entire joint by capillarity.

Cool down and remove flux residues by brushing with hot water.

Powder flux: Lastek 31C (general work) or Lastek 31CH (higher temperatures, e.g. large work pieces in red copper).

Paste flux: Lastek 31CN (general work) or Lastek 31CNB (stainless steel, hard metals and induction brazing).


Welding proces: Brazing rod
Material Type: Silver solder
Welding positions: PA, PB
Norm : EN ISO 17672
Classification: AG 140
Norm: EN 1044
Classification: AG 105
Minimum packing: 1 kg in a cardboard box (6 boxes in one pack)