ASTM B737 - 10(2015)
Standard Specification for Hot-Rolled and/or Cold-Finished Hafnium Rod and Wire
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Abstract
This specification covers hot-, cold-, or both hot- and cold-rolled hafnium rods and wires in either one of two grades. All grades should be in the recrystallization annealed condition unless specified otherwise. The materials should be made from ingots produced by vacuum melting in an electron beam or consumable arc furnaces, or both, of a type conventionally used for reactive metals. Samples for chemical composition tests should be taken from the top, middle, and bottom of the ingots. The requirements for mechanical properties do not apply to wires. Corrosion tests shall be done in water. All rods should be furnished in mechanically descaled and pickled, centerless ground and pickled, or centerless ground, pickled, and oxidized surface finish, while wires should be furnished in either conditioned and pickled or conditioned, pickled, and oxidized surface finish.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
15.1 For the purpose 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 methods of Practice E29.
| Property | Rounded Unit for Observed |
| Chemical composition, and tolerances (when expressed as decimals) | nearest unit in the last right-hand place of figures of the specified limit |
| Tensile strength and yield strength | nearest 1000 psi (10 MPa) |
| Elongation | nearest 1 % |
1. Scope
1.1 This specification covers hot- or cold-worked hafnium rod and wire.
1.2 This specification contains two material grades, one specifically for nuclear applications (Grade R1) and one for commercial alloying applications (Grade R3).
1.3 The products covered include the following:
1.3.1 Rod 3/8 to 1 in. (9.5 to 25 mm) in diameter.
1.3.2 Wire less than 3/8 in. (9.5 mm) in diameter.
1.4 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.
1.5 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
E8 Test Methods for Tension Testing of Metallic Materials
E21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E2626 Guide for Spectrometric Analysis of Reactive and Refractory Metals
ICS Code
ICS Number Code 77.150.99 (Other products of non-ferrous metals)
UNSPSC Code
UNSPSC Code 30102402(Non ferrous alloy rods)
Referencing This Standard
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DOI: 10.1520/B0737-10R15
Citation Format
ASTM B737-10(2015), Standard Specification for Hot-Rolled and/or Cold-Finished Hafnium Rod and Wire, ASTM International, West Conshohocken, PA, 2015, www.astm.org
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