Editing Beryllium copper (section)

== Properties ==
Beryllium copper is a [[Ductility|ductile]], weldable, and machinable alloy.  Like pure copper, it is resistant to [[Oxidizing acid|non-oxidizing acids]] (such as [[hydrochloric acid]] and [[carbonic acid]]) and plastic decomposition products,{{explain|date=April 2023}} to [[abrasive]] [[wear]], and to [[galling]].  It can be [[heat treatment|heat-treated]] for increased strength, durability, and [[electrical conductivity]]. 

Beryllium copper attains the greatest strength (up to {{convert|1400|MPa|psi|abbr=on}}) of any copper-based alloy.<ref>{{cite book |editor-last=Bauccio|editor-first= Michael |title=ASM Metals Reference Book, Third Edition|date= January 1993 |publisher= ASM International|location= Materials Park, Ohio|isbn= 0-87170-478-1|pages= 445}}</ref> It has [[thermal conductivity]] of 62 Btu/h-ft-°F (107 W/m-K), which is 3–5 times higher than [[tool steel]]. It has a solid melting point of 1590 °[[Fahrenheit|F]] (866 °[[Celsius|C]]) and a liquid melting point of 1800 °F (982 °C). It has a high capacity for being hot-formed. C17200 beryllium copper alloy has strength and hardness similar to that of steel; [[Rockwell hardness]] properties in its peaked age condition{{explain|date=April 2023}} are in the range of 200 ksi and RC45.

C17200 has effective corrosion-resistant properties when exposed to harsh conditions such as seawater, and [[Completion_(oil_and_gas_wells)#Lower_completion_(downhole_completion)|down-hole environments]]. It will withstand sulphide or chloride [[stress corrosion cracking]] and will resist the effects of carbon dioxide and hydrogen [[embrittlement]]. 

Copper alloys in general have always been considered non-sparking. C17200 has the strength to withstand use in hand and mechanical tools. These non-sparking features are best applied in explosive environments such as in the oil & gas and gunpowder industries.<ref>{{cite web|url=https://www.avivametals.com/products/c17200-copper|title=C17200 Berryllium Copper|website=Aviva Metals}}</ref>