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1.1 This specification covers seamless round and rectangular including square copper alloy tube in straight lengths. Ten alloys are specified having the following nominal compositions:

Copper Nominal Composition, %Alloy PreviouslyUNS UsedNo. Designation^A CopperZincLeadTinC22000790.010.0 ......C23000185.015.0 ......C26000270.030.0 ......C27000965.035.0 ......C27200863.037.0 ......C27400...62.537.5 ......C28000560.040.0 ......C33000366.033.5 0.5...C33200466.032.4 1.6...C37000660.039.0 1.0...C44300...7127.5 ...1.00^AAlloy Designations of ASTM Specification B 135 - 63 which was published in the 1966 Book of ASTM Standards, Part 5.

Note 1--This specification is the metric companion of Specification B135.

1.2 Warning--Mercury is a definite health hazard in use and disposal. (See 10.1.)