Sunday, July 13, 2008
Copper Yeild Strength
it tends to be reported as either a 0.5% extension under load or as
0.2% offset.
Most commonly the 0.5% extension yield strength of annealed material
registers as approximately one-third the tensile strength. Hardening
by cold working means
the material becomes less ductile, and yield strength approaches the
tensile strength.
Brass Inserts
torque-pull out resistance for threaded assembly in plastic. They also
carry a strong metal thread to strengthen the plastic components for
assembly.
Method of installation: Ultra-sonic, thermal & moulded-in.
Typical application: Telecommunication, instrument, electronics &
other plastic cases assembly.
1. Brass inserts
Further the round inserts, hexagonal inserts and square inserts are
also available. The inserts are available with diamond, straight or
unidirectional knurling.
2. Brass inserts - customise
Any kind of special brass insert can be developed and supplied exactly
as per customer specifications. Knurling inserts (round inserts /
hexagonal inserts / square inserts).
3. Brass insert - thread
ISO metric (MM threads).
BA threads.
BSW threads (inches).
UNC, UNF threads.
Any threads as per custom design.
4. Brass inserts knurling available - Diamond / straight / unidirectional.
Saturday, July 12, 2008
What are Monel valves?
Monel is a nickel-copper and zinc alloy that was patented in 1906. Its considered a 'natural alloy' since it can be produced by refining ore containing nickel and copper in the ratio it is found in the natural nickel-copper ore.
Monel is more expensive than stainless steel and highly resistant to corrosion. Its popular in marine applications, eyeglass frames, and musical instruments.
There's an excellent story of monel entitled 'A Century of Monel Metal: 1906-2006′, which contains this account:
- On January 30, 1906, U.S. patent 811,239 was issued to Ambrose Monell, then president of the three-year old Inco, for "a new and useful improvement in the manufacture-of nickel-copper alloys." As is stated in the Monell patent, the process included smelting, "bessemerization," calcining, and oxide reduction.While Browne's plan to make German silver from the nickel/copper alloy was indeed possible, it was determined that the resulting alloy of about 70% nickel and 30% copper-the natural ratio of those elements in the matte ore-had some quite interesting properties as produced. The new alloy was silvery white, brighter than nickel, stronger than steel, and more resistant to corrosion in saltwater and sulfuric acid than bronze. In honor of the company's president, the product was named "Monel" metal. www.brassbilletsrods.com
Friday, July 11, 2008
Brass Electrical Parts
www.brasselectricalparts.com
BRASS INSTRUMENTS
Alternatives to brass include other alloys containing significant amounts of copper or silver. These alloys are biostatic due to the oligodynamic effect, and thus suppress growth of molds, fungi or bacteria. Brass instruments constructed from stainless steel or aluminum have good sound quality but are rapidly colonized by microorganisms and become unpleasant to play.
Brasspart.net
brass instruments
www.deepri.com
