Precise finishing of aluminum: Solution annealing, T6/T7, stress-relief annealing, Vacuum-brazing. Cooling plates & lightweight components for energy and Mechanical engineering.
Aluminum alloys combine low weight with high thermal and electrical conductivity. Listemann supplies solution and precipitation hardening Heat treatments (T6/T7), vacuum-brazed cooling and lightweight structures as well as low-distortion processes for precise geometries.
Solution annealing & quenching, artificial ageing (precipitation hardening)
Stress-relief annealing for dimensionally stable parts
Vacuum-brazing for heat exchangers, cooling plates, complex structures
EB welding for deep, clean joining seams (depending on material)
Heat sinks/cooling plates, heat exchangers, lightweight housings
Apparatus and machine components with tight tolerances
Tool & die-making: inserts, lightweight components
Frequently Al-Mn/3xxx, Al-Mg/5xxx (with moderate Mg), Al-Si/4xxx, Al-Mg-Si/6xxx; 2xxx/7xxx are more critical and should be evaluated depending on the project.
Typical Al-Si solders (e.g. 4047/AlSi12, 4045/4343 as cladding) depending on operating temperature, gap, strength and corrosion requirements.
Depending on the geometry, approx. 0.05-0.15 mm, with even gaps, defined solder feed and stable fixing.
Typically durable up to ~200-250 °C (depending on application). For higher temperatures, check alternatives (material/solder/design).
Aluminum has a high coefficient of thermal expansion – therefore symmetrical design, defined fixtures, uniform heating/cooling. Intercept thin-walled parts with support cores.
Galvanic separation (coating/interlayer), adapted joining geometry, controlled media flow; take CTE differences into account.
Mostly Ra ~0.8-1.6 µm; too smooth impairs wetting, too rough increases flow resistance/risk of porosity.
Standard values: ribs ≥ 0.6-0.8 mm, webs ≥ 1.0 mm; feasibility sample recommended.
Phone: +41 52 245 18 55
Mobile: +41 77 442 46 91
t.bachmann@listemann.com
Phone: +423 375 90 12
Mobile: +423 78 05 401
t.bitschnau@listemann.com
Our new check helps you to get a professional assessment of possible projects within our procedures about the feasibility in the shortest time. We inform you whether and how a realization becomes possible.
With our know-how you open up the problem-free entry into new technologies. Our materials expertise helps you to bring products with innovative material properties to market and thus strengthen your competitive position.
