ASTM B737-10(2021)

Standard Specification for Hot-Rolled and/or Cold-Finished Hafnium Rod and Wire

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.
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
or Calculated Value  
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 %
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Mar-2021
• ICS: 77.150.99 - Other products of non-ferrous metals
• Technical Committee: B10 - Reactive and Refractory Metals and Alloys
• Drafting Committee: B10.02 - Zirconium and Hafnium

Relations

• Refers: ASTM E21-09 - Standard Test Methods for Elevated Temperature Tension Tests of Metallic Materials
• Effective Date: 01-Apr-2009
• Refers: ASTM E29-08 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Oct-2008
• Refers: ASTM E2626-08e1 - Standard Guide for Spectrometric Analysis of Reactive and Refractory Metals (Withdrawn 2017)
• Effective Date: 15-Jun-2008
• Refers: ASTM E2626-08 - Standard Guide for Spectrometric Analysis of Reactive and Refractory Metals
• Effective Date: 15-Jun-2008
• Refers: ASTM E29-06b - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Nov-2006
• Refers: ASTM E29-06a - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Sep-2006
• Refers: ASTM E29-06 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-May-2006
• Refers: ASTM E21-05 - Standard Test Methods for Elevated Temperature Tension Tests of Metallic Materials
• Effective Date: 01-Jun-2005
• Refers: ASTM E29-04 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Dec-2004
• Refers: ASTM E8-04 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 01-Apr-2004
• Refers: ASTM E21-03a - Standard Test Methods for Elevated Temperature Tension Tests of Metallic Materials
• Effective Date: 01-Dec-2003
• Refers: ASTM E21-03 - Standard Test Methods for Elevated Temperature Tension Tests of Metallic Materials
• Effective Date: 10-Aug-2003
• Refers: ASTM E8-03 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 10-Jul-2003
• Refers: ASTM E29-02e1 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 10-May-2002
• Refers: ASTM E8-01 - Standard Test Methods for Tension Testing of Metallic Materials
• Effective Date: 10-Oct-2001

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B737 −10 (Reapproved 2021)
Standard Specification for
Hot-Rolled and/or Cold-Finished Hafnium Rod and Wire
This standard is issued under the fixed designation B737; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E29Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This specification covers hot- or cold-worked hafnium
E2626Guide for Spectrometric Analysis of Reactive and
rod and wire.
Refractory Metals (Withdrawn 2017)
1.2 This specification contains two material grades, one
specifically for nuclear applications (Grade R1) and one for
3. Terminology
commercial alloying applications (Grade R3).
3.1 Definitions:
1.3 The products covered include the following:
3.1.1 rounds, flats, tubes, and wrought powder metallurgical
1.3.1 Rod ⁄8 to 1 in. (9.5 to 25 mm) in diameter.
products (single definition, common to nuclear and non-
1.3.2 Wire less than ⁄8 in. (9.5 mm) in diameter.
nuclear standards), n—a lot shall consist of a material of the
samesize,shape,condition,andfinishproducedfromthesame
1.4 Unlessasingleunitisused,forexample,corrosionmass
ingot or powder blend by the same reduction schedule and the
gain in mg/dm , the values stated in either inch-pound or SI
same heat treatment parameters. Unless otherwise agreed
units are to be regarded separately as standard. The values
between manufacturer and purchaser, a lot shall be limited to
stated in each system are not exact equivalents; therefore, each
the product of an 8 h period for final continuous anneal, or to
system must be used independently of the other. SI values
a single furnace load for final batch anneal.
cannot be mixed with inch-pound values.
1.5 This standard does not purport to address all of the
4. Ordering Information
safety concerns, if any, associated with its use. It is the
4.1 Purchase orders for material under this specification
responsibility of the user of this standard to establish appro-
shall include the following information as required to ad-
priate safety, health, and environmental practices and deter-
equately describe the desired material:
mine the applicability of regulatory limitations prior to use.
4.1.1 Quantity (weight or number of pieces),
1.6 This international standard was developed in accor-
4.1.2 Name of material,
dance with internationally recognized principles on standard-
4.1.3 Form (rod, wire),
ization established in the Decision on Principles for the
4.1.4 Finish (Section 12),
Development of International Standards, Guides and Recom-
4.1.5 Applicable dimensions (diameter and length),
mendations issued by the World Trade Organization Technical
4.1.6 Grade (Table 1),
Barriers to Trade (TBT) Committee.
4.1.7 ASTM designation and year of issue,
2. Referenced Documents 4.1.8 Zirconium analysis requirements (Table 1), and
2 4.1.9 Workmanship standards (Section 13).
2.1 ASTM Standards:
E8Test Methods for Tension Testing of Metallic Materials
NOTE 1—A typical ordering description is as follows: 500 lb hafnium
rod,annealed;mechanicallydescaledandpickled;0.375in.diameterby6
[Metric] E0008_E0008M
in. minimum random lengths; Grade R1;ASTM Specification B737–01.
E21TestMethodsforElevatedTemperatureTensionTestsof
Metallic Materials 4.2 In addition to the data specified in 4.1, the following
optionsandpointsofagreementbetweenthemanufacturerand
the purchaser shall be specified on the purchase order if
This specification is under the jurisdiction of ASTM Committee B10 on
required:
Reactive and Refractory Metals and Alloys and is the direct responsibility of
4.2.1 Mechanical test temperature (see 8.1),
Subcommittee B10.02 on Zirconium and Hafnium.
Current edition approved April 1, 2021. Published April 2021. Originally
4.2.2 Mechanical test requirements for Grade R3 (Section
approved in 1984. Last previous edition approved in 2015 as B737–10 (2015).
8),
DOI: 10.1520/B0737-10R21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
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B737−10 (2021)
TABLE 1 Chemical Requirements — Maximum Impurity Level
7. Chemical Composition
Composition, Weight %
7.1 The material shall conform to the requirements for
Alloying
chemical composition as prescribed in Table 1.
Nuclear Grade
Grade
Element
Grade R1 Grade R3 7.2 The manufacturer’s ingot analysis shall be considered
the chemical analysis for material produced to this specifica-
Aluminum 0.010 0.050
Carbon 0.015 0.025
tion except for hydrogen and nitrogen content which shall be
Chromium 0.010 0.050
determined on the finished product.
Copper 0.010 .
Hydrogen 0.0025 0.0050
7.3 Analysis shall be made using the manufacturer’s stan-
Iron 0.050 0.0750
dard methods.
Molybdenum 0.0020 .
Nickel 0.0050 .
7.4 Sampling for chemical composition shall consist of
Niobium 0.010 .
samplestakenattop,middle,andbottomoftheingot.Samples
Nitrogen 0.010 0.0150
Oxygen 0.040 0.130
for hydrogen and nitrogen shall be taken as two random
Silicon 0.010 0.050
samples from each lot at final size.
Tantalum 0.020 .
Tin 0.0050 .
Titanium 0.010 0.050 8. Mechanical Properties
Tungsten 0.0150 0.0150
8.1 Grade R1 in rod form shall conform to the requirements
Uranium 0.0010 .
Vanadium 0.0050 .
prescribed in Table 3 for room temperature mechanical prop-
AA
Zirconium
erties. Elevated temperature properties shall be used to deter-
B
Hafnium balance balance
mine compliance only when specified in the purchase order
A
Zirconium shall be reported. Acceptable levels shall be established by mutual
(see Test Methods E21).
agreement between purchaser and producer.
B
Hafnium isotopic composition and analytical methods, if required, shall be
8.2 The yield strength shall be determined by the offset
mutually agreed upon by the purchaser and producer.
(0.2%) method as prescribed in Test Methods E8.
8.3 The tensile properties shall be determined using a strain
rate of 0.003 to 0.007 in./in.[mm/mm]/min through the yield
4.2.3 Straightness (Table 2),
strength. After the yield strength has been exceeded, the
4.2.4 Special tests (Section 11),
cross-head speed shall be increased to approximately 0.05
4.2.5 Inspection (Section 16),
in./in.[mm/mm]/min to failure.
4.2.6 Hafnium isotopic composition and its analysis (Table
1), 8.4 Requirements for mechanical properties do not apply to
4.2.7 Metallurgical condition (Section 6), wire.
4.2.8 Corrosion test Grade 3 (9.3),
9. Corrosion Properties
4.2.9 Rejected material return (Section 17), and
4.2.10 Certification requirements (Section 19).
9.1 Two samples chosen at random from each lot shall be
corrosion tested in water at 680°F (360°C), 2690 psi (18.5
5. Materials and Manufacture
MPa) for 672+8 ⁄−0 h using the manufacturer’s standard
5.1 Material covered by this specification shall be made by
procedure.
conventional hot and cold working procedures, from ingots
9.2 Grade R1—Coupons shall exhibit a weight gain of not
produced by vacuum melting in electron beam or consumable 2
more than 10 mg/dm .
arcfurnaces,orboth,ofatypeconventionallyusedforreactive
9.3 Grade R3—Test for information only, if required by
metals.
purchase order.
6. Metallurgical Condition
10. Permissible Variations in Dimensions
6.1 All grades furnished under this specification shall be in
10.1 Rodandwireshallconformtothedimensionalrequire-
therecrystallizationannealedconditionunlessotherwisespeci-
ments for the specified product as prescribed in Table 2, Table
fied.
4, and Table 5.
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