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Beryllium copper (BeCu), also known as copper beryllium (CuBe), beryllium bronze, and spring copper, is a copper alloy with 0.5–3% beryllium. [1] Copper beryllium alloys are often used because of their high strength and good conductivity of both heat and electricity. [ 2 ]
The signs and symptoms of acute beryllium pneumonitis usually resolve over several weeks to months, but may be fatal in 10 percent of cases, [1] and about 15–20% of cases may progress to chronic beryllium disease. [8] Acute beryllium poisoning approximately doubles the risk of lung cancer. [9]
Beryllium poisoning is poisoning by the toxic effects of beryllium, or more usually its compounds. It takes two forms: Acute beryllium poisoning, usually as a result of exposure to soluble beryllium salts; Chronic beryllium disease (CBD) or berylliosis, usually as a result of long-term exposure to beryllium oxide usually caused by inhalation.
In the case of lead, any measurable amount may have negative health effects. [2] There is a popular misconception that only heavy metals can be toxic, but lighter metals such as beryllium and lithium can be toxic too. [3] Not all heavy metals are particularly toxic, and some are essential, such as iron.
Sep. 27—Eight electrical workers recently were exposed to toxic beryllium dust while removing ceiling tiles in a building at Los Alamos National Laboratory, the latest incident in a hazard the ...
Relevant occupations are those where beryllium is mined, processed or converted into metal alloys, or where machining of metals containing beryllium and recycling of scrap alloys occurs. [21] It is associated with aerospace manufacturing, microwave semiconductor electronics, beryllium mining or manufacturing of fluorescent light bulbs (which ...
When machining without coolant, swarf is usually very hot and can easily burn the machine operator. Machinists typically wear long pants, eye protection and other personal protective equipment for this reason. Some engineering materials such as beryllium are hazardous when finely divided and appropriate measures should be taken to prevent exposure.
ASTM B577 is the Standard Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper. The test focuses on hydrogen embrittlement of copper alloys, including a metallographic evaluation (method A), testing in a hydrogen charged chamber followed by metallography (method B), and method C is the same as B but ...