This specification2 covers five grades of zirconium strip, sheet, and plate. Unless a single unit is used, for example corrosion mass gain in mg/dm2 , the values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore each system must be used independently of the other. SI values cannot be mixed with inch-pound values.
Element |
Composition, % | ||||
|---|---|---|---|---|---|
| Grades | |||||
| R60700 | R60702 | R60704 | R60705 | R60706 | |
| Zirconium + hafnium, min | 99.2 | 99.2 | 97.5 | 95.5 | 95.5 |
| Hafnium, max | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 |
| Iron + chromium | 0.2 max | 0.2 max | 0.2 to 0.4 | 0.2 max | 0.2 max |
| Tin | ... | ... | 1.0 to 2.0 | ... | ... |
| Hydrogen, max | 0.005 | 0.005 | 0.005 | 0.005 | 0.005 |
| Nitrogen, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 |
| Carbon, max | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| Niobium | ... | ... | ... | 2.0 to 3.0 | 2.0 to 3.0 |
| Oxygen,max | 0.10 | 0.16 | 0.18 | 0.18 | 0.16 |
A. By agreement between the purchaser and the manufacturer, analysis may be required and limits established for elements and compounds not specified in the table of chemical composition