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Mässingslegeringar med låg blyhalt för svarvade komponenter ämnade för dricksvatten
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2011 (Swedish)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis is about brass alloys with low lead levels for manufacturing of turned components destined for human consumption. Is it technically possible, economically viable and environmentally necessary to produce lead-free brass alloys?

Turning tests and leaching tests has been carried out in low-lead brass. The result of the tests carried out show that it is technically possible to produce faucets in low-leaded brass, but since these alloys are harder and less ductile, it takes more power and more cooling when it is processed. There should be more reality-based tests in regular machines that belong in the line of manufacturing. Tests is needed to find out which tool materials, cutting angles, cooling, etc. which are needed to manufacture products with the right surface, dimensions, durability, etc.

One thing that no one knows today is the lifetime of a faucet made of low-lead brass. If these faucet’s do not have a higher life than that made in CW 602 N, it is a major strain on nature to produce these in low-lead brass, then to maintain production of the faucets as it is today.

No information has come from the Boverket of tougher requirements for lead content in brass. This makes it difficult to know how much effort that is needed to replace lead. A legal requirement or to lose market areas is otherwise a good motivation to move forward.

Place, publisher, year, edition, pages
Keyword [en]
Brass, lead, drinking water, turning, NKB4
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-47650OAI: diva2:455900
Educational program
Master of Science in Engineering - Materials Design and Engineering
Available from: 2012-01-03 Created: 2011-11-11 Last updated: 2012-01-03Bibliographically approved

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Gyhlesten Back, Jessica
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