Matthies Druckguss
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Matthies Druckguss GmbH & Co. KG
Bredstedter Straße 29 - 31
24768 Rendsburg
Phone: +49 4331 71253
Mail: info@druckgiesser.com
Matthies Druckguss GmbH & Co. KG
Bredstedter Straße 29-31
24768 Rendsburg
High-pressure die casting from brass alloys has several unbeatable advantages. On the one hand, all the advantages of the HPDC process can be utilised, such as economical production from a batch size of 500 pieces.
Secondly, the castings are produced with the very good reproduction accuracy typical of HPDC. This allows geometries to be realised that are ideally very close to the final contour and require little or no mechanical post-processing and are therefore ready for installation. With the conventional production of workpieces ‘from the solid’ using machining processes, long throughput times are to be expected, which has a negative impact on series production.
The high proportion of material waste (chips produced during machining) is also a cost factor that can by no means be regarded as negligible.
For components subject to normal stresses, unalloyed steel grades are usually used, which are subsequently shaped using various machining processes. The tensile strength of these steels is in the range of 360 N/mm² - 510 N/mm². In comparison, the time-consuming and sometimes very complex turning or milling cycles required in brass HPDC can be avoided by manufacturing close to the final contour. This makes it all the more advantageous that the strength values of die-cast brass are also in a comparable range. With strengths of 350 N/mm² - 500 N/mm² for brass or special brass alloys, substitution with common standard steel grades is therefore entirely possible.
For use in sanitary areas or areas where water flows through, excellent durability is achieved thanks to the good resistance to corrosion - without additional surface finishing processes.
The brass alloy can therefore be used directly in normal service water environments. If normally hardened and tempered steel were used, a surface finish would have to be added to protect the material. This is an additional work step on the one hand and another cost factor on the other.
Special brass alloys are also extremely resistant to dezincification and, thanks to their resistance to seawater, are also perfectly suited for use under water or in offshore applications. This is an advantage that would only lead to the choice of stainless steel in a direct material comparison with steel. However, the material costs for the application would be significantly higher, depending on the grade and finishing level, as not only is the raw material more cost-intensive, but appropriate machining must also be factored in.
Finally, if we compare the advantages already mentioned with the density, we can see that this is slightly higher for brass alloys (8.6 kg/dm³) than for the aforementioned steel grades S235JR (7.85 kg/dm³) and 1.4301 (7.90 kg/dm³). Consequently, in purely mathematical terms, a different weight would occur with the same component geometries. The cast component would be slightly heavier. However, this difference is equalised in the cast part by the possibility of lower wall thicknesses and ultimately by enormous material savings due to near-net-shape production. In most cases, the cast part ends up being even lighter than with comparable steel geometries.
In addition, the process-related advantage of HPDC means that there is no waste due to swarf, as is the case when manufacturing from solid material. A decisive cost advantage and a real signal in terms of sustainability!
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Matthies Druckguss GmbH & Co. KG
Bredstedter Straße 29 - 31
24768 Rendsburg
Phone: +49 4331 71253
Mail: info@druckgiesser.com
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CONTACT
Matthies Druckguss GmbH & Co. KG
Bredstedter Straße 29/31
24768 Rendsburg
Phone: +49 4331 71253
Mail: info@druckgiesser.com
Download
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