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ASTM B776-12

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Standard Specification for Hafnium and Hafnium Alloy Strip, Sheet, and Plate

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1.1 This specification covers two grades of wrought hafnium and hafnium alloy strip, sheet, and plate as follows:

1.1.1 Grade R1 for nuclear applications, and

1.1.2 Grade R3 for commercial applications.

1.2 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.

1.3 The following precautionary caveat pertains only to the test method portions of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


This specification covers the standard requirements for two grades of wrought hafnium and hafnium alloy strip, sheet, and plate: Grade R1 for nuclear applications and Grade R3 for commercial applications. The materials shall be made from ingots that are produced in a furnace by vacuum or plasma arc melting, vacuum electron-beam melting, a combination of these three methods, or other melting process conventionally used for reactive metals. The various mill products shall be formed with the conventional extrusion, forging, or rolling equipment normally found in primary ferrous and nonferrous plants. The sheet, strip, and plate shall either be hot-rolled or cold-rolled and shall be supplied in the recrystallized annealed condition. Grades R1 and R3 metal shall conform to the chemical composition requirements for aluminum, carbon, chromium, copper, hydrogen, iron, molybdenum, nickel, niobium, nitrogen, oxygen, silicon, tantalum, tin, titanium, tungsten, uranium, vanadium, zirconium, and hafnium as shall be determined by chemical analysis. Mechanical properties, which shall be determined by tension tests both in longitudinal and transverse direction, shall meet the prescribed tensile strength, yield strength, and elongation requirements. Corrosion testing in water shall also be performed to determine the corrosion resistance of the materials.


SDO ASTM: ASTM International
Document Number B776
Publication Date Nov. 1, 2012
Language en - English
Page Count 9
Revision Level 12
Supercedes
Committee B10.02
Publish Date Document Id Type View
Nov. 1, 2012 B0776-12 Revision
May 1, 2007 B0776-07 Revision
Sept. 1, 2006 B0776-06 Revision
Nov. 10, 2001 B0776-01A Revision
Nov. 10, 2001 B0776-01 Revision
April 1, 2024 B0776-12R24 Reaffirmation
April 1, 2019 B0776-12R19 Reaffirmation
Nov. 10, 2001 B0776-91R95 Reaffirmation