ASTM B551 Specification

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.

Chemical CompositionA


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
Note:

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