On this page you can find information about our alloy 6026. This alloy produces relatively short shavings without large amounts of lead, thereby ensuring compliance with the provisions of the RoHS directive.
Alloy 6026: Short shavings with less lead
The processing of aluminium results in shavings that can cause problems for the machinery used during processing. To ensure that the shavings cause as little inconvenience as possible, it is therefore an advantage if they are short so they break off without being of any nuisance to the machines.
It has been an established fact for years that adding lead to aluminium creates alloys with short shavings.
“When aluminium is turned and milled, it normally produces long shavings that stick to the machine. But lead makes the shavings break and fall off the machine. This prevents them from interfering with subsequent processing on the respective machine,“ says René Christensen, quality manager at Alcobra.
From lead to bismuth
After the discovery of the positive effect of lead on the alloy, the task was to further develop the original lead alloy, 6262, and reduce its lead content.
“We couldn't find an adequate substitute at first. First we were first successful when we made several attempts to add bismuth, which is a material that has some of the properties of lead. It works in the same way as lead and is not that problematic a heavy metal as lead,“ says René Christensen and continues:
“The next development of the product came when the RoHS directive placed new requirements on lead content. Since there could now be not more than 0.40 g of lead in an alloy, we made additional improvements to reduce the lead content.“
6026 is in full compliance with the RoHS Directive
The RoHS Directive is a EU regulation that places requirements on the maximum content of, for example, lead in different metals, including aluminium alloys used in electronic and electrical equipment. In response to the RoHS Directive, we have developed alloy 6026, which is the newest version of the abovementioned product:
“This is a newly developed alloy where we have tried to do things in a slightly different manner. According to feedback from customers, it works very well and produces shavings that are manageable.“
Even though the newly developed alloy contains far less lead than its predecessor, its potential fields of application are still many:
“Since it is a 6000 alloy, it can be anodised, used as a decorative surface, welded etc. It is pliable and provides a host of possibilities for processing. Nevertheless, we recommend that our customers mill the first, outermost layer if they are to use it for decorative purposes,“ advises René Christensen.
The following tables give you an overview of the properties, composition and mechanical values of alloy 6026.