ASTM B154-95

Standard Test Method for Mercurous Nitrate Test for Copper and Copper Alloys

SCOPE
1.1 This test method describes the technique for conducting the mercurous nitrate test for residual stresses in wrought copper and cast or wrought copper-based alloy products. This test method is intended to cover the mercurous nitrate test of certain copper-alloy products supplied in accordance with ASTM specifications prepared by Committee B05. This test method is not intended to be used on assembled parts.
Note 1—For any particular copper alloy, reference should be made to the material specification.
1.2  Units—The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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 determines the applicability of regulatory limitations prior to use. For specific precautionary and hazard statements see Sections 1, 6, and 7. (Warning—Mercury is a definite health hazard in use and disposal.)

General Information

• Status: Historical
• Publication Date: 09-Oct-2001
• ICS: 77.120.30 - Copper and copper alloys
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.06 - Methods of Test

Relations

• Replaced By: ASTM B154-01 - Standard Test Method for Mercurous Nitrate Test for Copper and Copper Alloys
• Effective Date: 10-Oct-2001
• Referred By: ASTM B950-22 - Standard Guide for Editorial Procedures and Form of Product Specifications for Copper and Copper Alloys
• Effective Date: 10-Oct-2001
• Referred By: ASTM B1014-20 - Standard Specification for Welded Copper and Copper Alloy Condenser and Heat Exchanger Tubes with a Textured Surface(s)
• Effective Date: 10-Oct-2001
• Referred By: ASTM B395/B395M-18 - Standard Specification for U-Bend Seamless Copper and Copper Alloy Heat Exchanger and Condenser Tubes
• Effective Date: 10-Oct-2001
• Referred By: ASTM B249/B249M-22 - Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
• Effective Date: 10-Oct-2001
• Referred By: ASTM F468M-06(2018) - Standard Specification for Nonferrous Bolts, Hex Cap Screws, and Studs for General Use (Metric)
• Effective Date: 10-Oct-2001
• Referred By: ASTM B359/B359M-18 - Standard Specification for Copper and Copper-Alloy Seamless Condenser and Heat Exchanger Tubes With Integral Fins
• Effective Date: 10-Oct-2001
• Referred By: ASTM B858-06(2018) - Standard Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys
• Effective Date: 10-Oct-2001
• Referred By: ASTM F467-13(2018) - Standard Specification for Nonferrous Nuts for General Use
• Effective Date: 10-Oct-2001
• Referred By: ASTM B111/B111M-18a - Standard Specification for Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock
• Effective Date: 10-Oct-2001
• Referred By: ASTM B587-19 - Standard Specification for Welded Brass Tube
• Effective Date: 10-Oct-2001
• Referred By: ASTM F468-23 - Standard Specification for Nonferrous Bolts, Hex Cap Screws, Socket Head Cap Screws, and Studs for General Use
• Effective Date: 10-Oct-2001
• Referred By: ASTM B21/B21M-20 - Standard Specification for Naval Brass Rod, Bar, and Shapes
• Effective Date: 10-Oct-2001
• Referred By: ASTM B552-19 - Standard Specification for Seamless and Welded Copper–Nickel Tubes for Water Desalting Plants
• Effective Date: 10-Oct-2001
• Referred By: ASTM B150/B150M-19 - Standard Specification for Aluminum Bronze Rod, Bar, and Shapes
• Effective Date: 10-Oct-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 154 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Mercurous Nitrate Test for Copper and Copper Alloys
This standard is issued under the fixed designation B 154; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope assembly, its component parts, or the original mill product.
1.1 This test method describes the technique for conducting
4. Mercurous Nitrate Solution
the mercurous nitrate test for residual stress in wrought copper
4.1 Concentration—The solution shall be an aqueous mer-
and cast or wrought copper-base alloy products. This test
curous nitrate solution containing 10 g of HgNO and 10 mL of
method is intended to cover the mercurous nitrate test of
HNO (sp gr 1.42) per litre of solution.
certain copper-alloy products supplied in accordance with
4.2 Preparation—The aqueous mercurous nitrate solution
ASTM specifications prepared by Committee B-5. This test
shall be prepared by either of the following procedures, A or B.
method is not intended to be used on assembled parts.
Used solutions may be replenished as described in 4.3.
NOTE 1—For any particular copper alloy, reference should be made to
4.2.1 Procedure A—Dissolve 11.4 g of HgNO ·2HOor
3 2
the material specification.
10.7 g of HgNO ·H O in approximately 40 mL of distilled
3 2
1.2 The values stated in SI units are to be regarded as the
water acidified with 10 mL of HNO (sp gr 1.42). After the
standard. The values given in parentheses are for information
crystals are completely dissolved, dilute the solution with
only.
distilled water to 1000 mL.
1.3 This standard does not purport to address all of the
NOTE 3—Warning: The mercurous nitrate crystals are obtainable in
safety concerns, if any, associated with its use. It is the
both the monohydrate and dihydrate form and should be handled with
responsibility of the user of this standard to establish appro-
caution because of their highly toxic effects.
priate safety and health practices and determine the applica-
NOTE 4—Caution: When weighing crystals, the weight of the water of
bility of regulatory limitations prior to use. For specific crystallization should be taken into consideration. The mercurous nitrate
crystals are photosensitive and when they have turned yellow are difficult
precautionary and hazard statements see Note 2, Note 3, Note
to dissolve.
4, Note 5, and Note 6 and Sections 1, 4, 5, and 7.
NOTE 5—Precaution: Care should be exercised when mixing chemi-
NOTE 2—Warning: Mercury is a definite health hazard in use and cals. Mixing should only be done by qualified personnel using appropriate
disposal. chemical laboratory techniques.
4.2.2 Procedure B—Dissolve 76 g of mercury in 114 mL of
2. Terminology
diluted HNO (1 part water to 1 part HNO ) (sp gr 1.42).
3 3
2.1 Definitions:
Carefully dilute with distilled water to 1000 mL. This provides
2.1.1 stress corrosion crack—spontaneous failure of metals
a concentration of 100 g of HgNO after a slight loss due to
by cracking under combined action of corrosion and stress,
heating. Add the water in small portions while stirring to
residual or applied.
prevent local overdilution. This gradual dilution, together with
2.1.2 residual stress—stresses that remain within a body as
the excess acid, will prevent precipitation of basic salts of
the result of plastic deformation or casting.
mercury. Dilute 100 mL of this solution (10 %) with 7 mL of
HNO (sp gr 1.42) and 893 mL of water.
3. Significance and Use
NOTE 6—Warning: Mercury is a definite health hazard and therefore
3.1 This test method is an accelerated test for detecting the
equipment for the detection and removal of mercury vapor produced in
presence of residual (internal) stresses which might result in
volatilization is recommended. The use of rubber gloves in testing is
failure of individual parts in storage or in service due to stress
advisable.
corrosion cracking. This test method is not intended for
4.3 Replenishment of Solution—The spent solution may be
assemblies under applied stress. If used for that purpose it shall
reclaimed by replenishing the mercurous nitrate solution, to a
be for information only and not a cause for rejection of the
1 % concentration, as follows:
4.3.1 Measure as accurately as possible in a small graduated
This test method is under the jurisdiction of ASTM Committee B-5 on Copper
cylinder 50 mL of the spent HgNO solution.
and Copper Alloys and is the direct responsibility of Subcommittee B05.06 on
Methods of Test. 4.3.2 Transfer to an Erlenmeyer flask, and add 10 mL of
Current edition approved Sept. 10, 1995. Published November 1995. Originally
HNO (1 + 1).
published as B 154 – 41 T. Last previous edition B 154 – 92.
B 154
NOTE 7—If heating is used in either of the previous procedures, the
4.3.3 Add slowly KMnO solution (1 %) from a buret with
container should be covered with a watch glass to prevent loss of HNO
a constant shaking until there is an excess as indicated by the
and water to the atmosphere. After solution is complete, us
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