For purposes of determining compliance with the specified limits for requirements of the properties listed in the following table, an observed value or a calculated value shall be rounded as indicated in accordance with the rounding method of Practice E29.
| Property | Rounded Unit for Calculated or Observed Value |
| Chemical composition | nearest unit in the last right-hand place of figures of the specified limit |
| Hardness | |
| Electrical resistivity | nearest unit in the last right-hand place of figures |
| Electrical conductivity | |
| Tensile strength | nearest ksi (5 MPa) |
| Elongation: below 5 % | nearest multiple of 0.5 % |
| 5 % and over | nearest 1 % |
1.1 This specification establishes the requirements for seamless copper bus pipe and tube intended for use as electrical conductors.
1.1.1 The product shall be made from one of the following coppers, as denoted in the ordering information:
| Previously | ||
| Copper | Used Desig- | |
| UNS No. | nation | Type of Copper |
| C10100 | OFE | Oxygen-free, electronic |
| C10200 | OF | Oxygen-free without residual deoxidants |
| C10300 | — | Oxygen-free, extra low phosphorus |
| C10400, C10500, C10700 | OFS | Oxygen-free, silver bearing |
| C11000 | ETP | Electrolytic tough pitch |
| C11300, C11400, C11600 | STP | Silver-bearing tough pitch |
| C12000 | DLP | Phosphorized, low residual phosphorus |
1.2 Unless otherwise specified, any one of the above coppers may be furnished.
1.3 Units8212;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 ......
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