1.1 This specification establishes the requirements for seamless copper and copper-alloy rectangular tube intended for use as transmission lines in electronic equipment. Five types of material are specified having the following nominal compositions:

Copper or Copper Alloy UNS No.	Previously Used Designation	Nominal Composition, %
Copper or Copper Alloy UNS No.	Previously Used Designation	Copper	Zinc	Phos- phorus

C10100	Copper, Type OFE^A	99.99^B	...	...
C10200	Copper, Type OF^A	99.95^B	...	...
C10300	Copper, Type OFXLP^A	99.95^B	...	0.003
C12000	Copper, Type DLP^A	99.90^B	...	0.008
C22000	Commercial bronze, 90 %	90	10	...
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^A Types OF, OFE, OFXLP, and DLP are described in Classification B224.

^B Minimum copper percentage.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units which are provided for information only and are not considered standard.