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Machinability and manufacturing cost in low-lead brass

Schultheiss, Fredrik LU ; Windmark, Christina LU ; Sjöstrand, Stefan; Rasmusson, Magnus and Ståhl, Jan Eric LU (2018) In International Journal of Advanced Manufacturing Technology p.1-10
Abstract

Today, commercially used brasses commonly contain 2 to 4 wt% lead. As the availability of low-lead and lead-free brass increases, there are environmental incentives for investigating the consequences of replacing the lead-containing brasses with lead-free equivalents. Generally, lead-free brass is expected to have a lower machinability than its lead-alloyed counterpart, implying a higher manufacturing cost. Thus, the aim of this study has been to quantify the added manufacturing cost by replacing a standard brass alloy with a low-lead alternative. This was done through a case study performed at a Swedish SME which replaced CuZn39Pb3 (3.3 wt% Pb) with low-lead CuZn21Si3P (< 0.09 wt% lead) for a select part. Since CuZn21Si3P is almost... (More)

Today, commercially used brasses commonly contain 2 to 4 wt% lead. As the availability of low-lead and lead-free brass increases, there are environmental incentives for investigating the consequences of replacing the lead-containing brasses with lead-free equivalents. Generally, lead-free brass is expected to have a lower machinability than its lead-alloyed counterpart, implying a higher manufacturing cost. Thus, the aim of this study has been to quantify the added manufacturing cost by replacing a standard brass alloy with a low-lead alternative. This was done through a case study performed at a Swedish SME which replaced CuZn39Pb3 (3.3 wt% Pb) with low-lead CuZn21Si3P (< 0.09 wt% lead) for a select part. Since CuZn21Si3P is almost twice as expensive as CuZn39Pb3, the material cost was found to have a substantial influence on the manufacturing cost. Additionally, the lower machinability implied a longer cycle time and higher losses while machining CuZn21Si3P, resulting in a 77% overall increase in manufacturing cost when using the low-lead material. Arguably, the difference in material cost, and thus manufacturing cost, may decrease over time making production of low-lead and lead-free brass products a viable option, especially when considering the environmental incentive for decreasing the amount of lead in circulation.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Brass, Lead, Machinability, Machining, Manufacturing cost
in
International Journal of Advanced Manufacturing Technology
pages
10 pages
publisher
Springer
external identifiers
  • scopus:85046025421
ISSN
0268-3768
DOI
10.1007/s00170-018-1866-4
language
English
LU publication?
yes
id
a0b11bd2-0a87-4ec7-8b4b-5931c481e7ec
date added to LUP
2018-05-14 09:34:39
date last changed
2018-05-14 15:41:49
@article{a0b11bd2-0a87-4ec7-8b4b-5931c481e7ec,
  abstract     = {<p>Today, commercially used brasses commonly contain 2 to 4 wt% lead. As the availability of low-lead and lead-free brass increases, there are environmental incentives for investigating the consequences of replacing the lead-containing brasses with lead-free equivalents. Generally, lead-free brass is expected to have a lower machinability than its lead-alloyed counterpart, implying a higher manufacturing cost. Thus, the aim of this study has been to quantify the added manufacturing cost by replacing a standard brass alloy with a low-lead alternative. This was done through a case study performed at a Swedish SME which replaced CuZn39Pb3 (3.3 wt% Pb) with low-lead CuZn21Si3P (&lt; 0.09 wt% lead) for a select part. Since CuZn21Si3P is almost twice as expensive as CuZn39Pb3, the material cost was found to have a substantial influence on the manufacturing cost. Additionally, the lower machinability implied a longer cycle time and higher losses while machining CuZn21Si3P, resulting in a 77% overall increase in manufacturing cost when using the low-lead material. Arguably, the difference in material cost, and thus manufacturing cost, may decrease over time making production of low-lead and lead-free brass products a viable option, especially when considering the environmental incentive for decreasing the amount of lead in circulation.</p>},
  author       = {Schultheiss, Fredrik and Windmark, Christina and Sjöstrand, Stefan and Rasmusson, Magnus and Ståhl, Jan Eric},
  issn         = {0268-3768},
  keyword      = {Brass,Lead,Machinability,Machining,Manufacturing cost},
  language     = {eng},
  month        = {03},
  pages        = {1--10},
  publisher    = {Springer},
  series       = {International Journal of Advanced Manufacturing Technology},
  title        = {Machinability and manufacturing cost in low-lead brass},
  url          = {http://dx.doi.org/10.1007/s00170-018-1866-4},
  year         = {2018},
}