| 摘要 |
A copper based alloy, which when employed in a marine environment with a cathodic protection system or when galvanically coupled to a dissimular metal, is resistant to hydrogen embrittlement, copper being present in an amount of about 70 % to 80 % by weight, and the alloy having in addition, (by weight): nickel 13.5 % to 20.0 %, aluminium 1.4 % to 2.0 %, manganese 3.4 % to 9.3 %, iron 0.5 % to 1.5 %, chromium 0.3 % to 1.0 %, niobium 0.5 % to 1.0 %, and wherein the constituent elements are so controlled that:A)Cu/(Mn+Ni)is less than 4.9 in terms of weight %; B) Cu/(Mn+Ni)is greater than 3 in terms of weight %;C) A? + Nb is at least 2.1 in terms of weight %; and D) Ni/(A? + Nb) is at least 6.0 in terms of weight %.
|
