ASTM E1456-08
(Specification)Standard Specification for Caustic Potash; Solid (Potassium Hydroxide; Solid) (Withdrawn 2017)
Standard Specification for Caustic Potash; Solid (Potassium Hydroxide; Solid) (Withdrawn 2017)
ABSTRACT
This specification covers two grades of solid caustic potash as follows: Type I, 85 % potassium hydroxide; and Type II, 90 % potassium hydroxide. Sampled specimens shall be tested and conform accordingly to chemical requirements as to total alkalinity of KOH, and specified maximum compositions for K2CO3, KCl, and Fe.
SCOPE
1.1 This specification covers two grades of solid caustic potash, 85 % and 90 %.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.3 Review the current Materials Safety Data Sheets (MSDS) for detailed information concerning toxicity, first aid procedures, handling and safety precautions.
1.4 The following safety hazards caveat pertains only to the test methods portion, Section 6: 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.
WITHDRAWN RATIONALE
Formerly under the jurisdiction of Committee D16 on Aromatic Hydrocarbons and Related Chemicals, this specification was withdrawn in January 2017 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E1456 −08
Standard Specification for
1
Caustic Potash; Solid (Potassium Hydroxide; Solid)
This standard is issued under the fixed designation E1456; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* E291 Test Methods for Chemical Analysis of Caustic Soda
and Caustic Potash (Sodium Hydroxide and Potassium
1.1 This specification covers two grades of solid caustic
Hydroxide)
potash, 85 % and 90 %.
E300 Practice for Sampling Industrial Chemicals
1.2 The values stated in SI units are to be regarded as
standard. The values given in parentheses are for information
3. Classification
only.
3.1 Type I—Caustic potash, solid form, 85 % potassium
1.3 Review the current Materials Safety Data Sheets
hydroxide.
(MSDS) for detailed information concerning toxicity, first aid
procedures, handling and safety precautions.
3.2 Type II—Caustic potash, solid form, 90 % potassium
1.4 The following safety hazards caveat pertains only to the
hydroxide.
test methods portion, Section 6:Thisstandarddoesnotpurport
to address all of the safety concerns, if any, associated with its
4. Chemical Requirements
use. It is the responsibility of the user of this standard to
4.1 Caustic potash shall conform to the chemical require-
establish appropriate safety and health practices and deter-
ments listed in Table 1.
mine the applicability of regulatory limitations prior to use.
2. Referenced Documents
5. Sampling
2
2.1 ASTM Standards:
5.1 Caustic potash shall be sampled in accordance with the
appropriate sections of Practice E300 for solid chemicals.
1
This specification is under the jurisdiction of ASTM Committee D16 on
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
6. Test Methods
Subcommittee D16.15 on Industrial and Specialty General Standards.
Current edition approved April 1, 2008. Published May 2008. Originally
6.1 Analyze caustic potash in accordance with the appli-
approved in 1992. Last previous edition approved in 2002 as E1456– 97 (2002).
cable sections of Test Methods E291.
DOI: 10.1520/E1456-08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact
...
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SIGNIFICANCE AND USE
3.1 Caustic soda and caustic potash are used in a large number of manufacturing processes. The chemicals are available in several grades depending on their intended use. The test methods listed in 1.2 provide procedures for analyzing caustic soda and caustic potash to determine if they are suitable for their intended use.
SCOPE
1.1 These test methods cover only the analyses usually required on the following commercial products:
1.1.1 Caustic soda (sodium hydroxide), 50 and 73 % liquors; anhydrous (solid, flake, ground, or powdered), and
1.1.2 Caustic potash (potassium hydroxide), 45 % liquor; anhydrous (solid, flake, ground, or powdered).
1.2 The analytical procedures appear in the following order:
Alkalinity (Total), Titrimetric (for 50 to 100 %
NaOH and 45 to 100 % KOH)
3 to 4
Carbonate, Gas-Volumetric (0.001 g CO2, min)
4 to 7
Carbonate, Gravimetric (0.001 g CO2, min)
7 to 10
Chloride, Titrimetric, (0.001 g Cl−, min)
10 to 11
Chloride, Potentiometric Titration (0.3 to 1.2 %)
11 to 12
Chloride, Ion Selective Electrode (0.6 to 120 μg/g)
12 to 13
Iron, Photometric (0.005 mg Fe, min)
13 to 15
Sulfate, Gravimetric, (0.002 g SO3, min)
15 to 16
Keywords
16
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard with the exception of inch-pound units for apparatus descriptions.
1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.
1.5 Review the current Safety Data Sheet (SDS) for detailed information concerning toxicity, first-aid procedures, handling, and safety precautions.
1.6 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. Specific hazard statements are given in Section 6.
1.7 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.
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SIGNIFICANCE AND USE
4.1 Anion impurities in caustic soda and caustic potash are monitored by manufacturers and users for quality control of the products. Anions of primary interest are chloride, chlorate, and sulfate. This test method has determined precision estimates only for these three impurities.
SCOPE
1.1 This test method covers the determination of anionic impurities in 50 % caustic soda (sodium hydroxide) and 50 % caustic potash (potassium hydroxide) solutions using ion chromatography (IC). Anions that can be determined at concentrations of approximately 0.1 to 1000 ug/g (ppm) include: bromide, chlorate, chloride, fluoride, nitrate, phosphate, and sulfate.
1.2 By varying the sample size, this test method can be used for anhydrous caustic soda and caustic potash products, as well as other concentrations of liquid products.
1.3 This test method is not intended to be used to quantify chloride in caustic soda where the sodium chloride concentration is approximately 1 %. For the most accurate determinations, it is recommended that high concentrations of chloride be analyzed using a potentiometric titration procedure, such as the one described in Test Methods E291.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.5 Review the current appropriate Safety Data Sheets (SDS) for detailed information concerning toxicity, first aid procedures, and safety precautions.
1.6 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. Specific hazards statements are given in Section 8.
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SIGNIFICANCE AND USE
Caustic soda and caustic potash are used in a large number of manufacturing processes. The chemicals are available in several grades depending on their intended use. The test methods listed in 1.2 provide procedures for analyzing caustic soda and caustic potash to determine if they are suitable for their intended use.
SCOPE
1.1 These test methods cover only the analyses usually required on the following commercial products:
1.1.1 Caustic soda (sodium hydroxide), 50 and 73 % liquors; anhydrous (solid, flake, ground, or powdered), and
1.1.2 Caustic potash (potassium hydroxide), 45 % liquor; anhydrous (solid, flake, ground, or powdered).
1.2 The analytical procedures appear in the following order:
Alkalinity (Total), Titrimetric (for 50 to 100 %
NaOH and 45 to 100 % KOH) 8 to 14 Carbonate, Gas-Volumetric (0.001 g CO2, min)15 to 24 Carbonate, Gravimetric (0.001 g CO2, min)25 to 33 Chloride, Titrimetric, (0.001 g Cl−, min)34 to 40 Chloride, Potentiometric Titration (0.3 to 1.2 %)41 to 47 Chloride, Ion Selective Electrode (0.6 to 120 μg/g)48 to 55 Iron, Photometric (0.005 mg Fe, min)56 to 64 Sulfate, Gravimetric, (0.002 g SO3, min)65 to 71 Keywords72
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard with the exception of inch-pound units for apparatus descriptions.
1.4 Review the current Material Safety Data Sheet (MSDS) for detailed information concerning toxicity, first-aid procedures, handling, and safety precautions.
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. Specific hazard statements are given in Section 6.
8.1 This test method covers the determination of the total alkalinity of 50 and 73 % liquid caustic soda, 45 % liquid caustic potash, and anhydrous caustic soda and caustic potash.
15.1 This test method describes the gas-volumetric determination of sodium carbonate or potassium carbonate in caustic soda or caustic potash respectively. The lower limit of determination is 0.001 g as carbon dioxide.
25.1 This test method covers the gravimetric determination of carbonate in caustic soda or caustic potash. The lower limit of determination is 0.001 g as carbon dioxide.
34.1 This test method covers the volumetric determination of chloride in caustic soda or caustic potash by the Volhard test method. The lower limit of determination is 0.001 g as chloride.
41.1 This test method was developed for the analysis of chloride in caustic soda and caustic potash. It covers the potentiometric titration of 0.3 to 1.2 % of chloride in caustic soda and caustic potash. This test method may be applied to other concentrations by using equivalent sample weights.
49.1 This test method was developed for the analysis of chloride in caustic soda and caustic potash. It covers the ion selective electrode determination of 1 to 120 μg/g chloride in caustic soda and caustic potash. This test method may be applied to other concentrations by using equivalent sample weights.
58.1 This test method covers the photometric determination of iron in caustic soda or caustic potash. The lower limit of determination is 0.1 μg/g as iron.
67.1 This test method covers the gravimetric determination of sulfate present in caustic soda or caustic potash. The lower limit of determination is 0.002 g.
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SIGNIFICANCE AND USE
3.1 Caustic soda and caustic potash are used in a large number of manufacturing processes. The chemicals are available in several grades depending on their intended use. The test methods listed in 1.2 provide procedures for analyzing caustic soda and caustic potash to determine if they are suitable for their intended use.
SCOPE
1.1 These test methods cover only the analyses usually required on the following commercial products:
1.1.1 Caustic soda (sodium hydroxide), 50 and 73 % liquors; anhydrous (solid, flake, ground, or powdered), and
1.1.2 Caustic potash (potassium hydroxide), 45 % liquor; anhydrous (solid, flake, ground, or powdered).
1.2 The analytical procedures appear in the following order:
Alkalinity (Total), Titrimetric (for 50 to 100 %
NaOH and 45 to 100 % KOH)
3 to 4
Carbonate, Gas-Volumetric (0.001 g CO2, min)
4 to 7
Carbonate, Gravimetric (0.001 g CO2, min)
7 to 10
Chloride, Titrimetric, (0.001 g Cl−, min)
10 to 11
Chloride, Potentiometric Titration (0.3 to 1.2 %)
11 to 12
Chloride, Ion Selective Electrode (0.6 to 120 μg/g)
12 to 13
Iron, Photometric (0.005 mg Fe, min)
13 to 15
Sulfate, Gravimetric, (0.002 g SO3, min)
15 to 16
Keywords
16
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard with the exception of inch-pound units for apparatus descriptions.
1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.
1.5 Review the current Safety Data Sheet (SDS) for detailed information concerning toxicity, first-aid procedures, handling, and safety precautions.
1.6 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. Specific hazard statements are given in Section 6.
1.7 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.
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SIGNIFICANCE AND USE
4.1 Anion impurities in caustic soda and caustic potash are monitored by manufacturers and users for quality control of the products. Anions of primary interest are chloride, chlorate, and sulfate. This test method has determined precision estimates only for these three impurities.
SCOPE
1.1 This test method covers the determination of anionic impurities in 50 % caustic soda (sodium hydroxide) and 50 % caustic potash (potassium hydroxide) solutions using ion chromatography (IC). Anions that can be determined at concentrations of approximately 0.1 to 1000 ug/g (ppm) include: bromide, chlorate, chloride, fluoride, nitrate, phosphate, and sulfate.
1.2 By varying the sample size, this test method can be used for anhydrous caustic soda and caustic potash products, as well as other concentrations of liquid products.
1.3 This test method is not intended to be used to quantify chloride in caustic soda where the sodium chloride concentration is approximately 1 %. For the most accurate determinations, it is recommended that high concentrations of chloride be analyzed using a potentiometric titration procedure, such as the one described in Test Methods E291.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.5 Review the current appropriate Safety Data Sheets (SDS) for detailed information concerning toxicity, first aid procedures, and safety precautions.
1.6 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. Specific hazards statements are given in Section 8.
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SIGNIFICANCE AND USE
Caustic soda and caustic potash are used in a large number of manufacturing processes. The chemicals are available in several grades depending on their intended use. The test methods listed in 1.2 provide procedures for analyzing caustic soda and caustic potash to determine if they are suitable for their intended use.
SCOPE
1.1 These test methods cover only the analyses usually required on the following commercial products:
1.1.1 Caustic soda (sodium hydroxide), 50 and 73 % liquors; anhydrous (solid, flake, ground, or powdered), and
1.1.2 Caustic potash (potassium hydroxide), 45 % liquor; anhydrous (solid, flake, ground, or powdered).
1.2 The analytical procedures appear in the following order:
Alkalinity (Total), Titrimetric (for 50 to 100 %
NaOH and 45 to 100 % KOH) 8 to 14 Carbonate, Gas-Volumetric (0.001 g CO2, min)15 to 24 Carbonate, Gravimetric (0.001 g CO2, min)25 to 33 Chloride, Titrimetric, (0.001 g Cl−, min)34 to 40 Chloride, Potentiometric Titration (0.3 to 1.2 %)41 to 47 Chloride, Ion Selective Electrode (0.6 to 120 μg/g)48 to 55 Iron, Photometric (0.005 mg Fe, min)56 to 64 Sulfate, Gravimetric, (0.002 g SO3, min)65 to 71 Keywords72
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard with the exception of inch-pound units for apparatus descriptions.
1.4 Review the current Material Safety Data Sheet (MSDS) for detailed information concerning toxicity, first-aid procedures, handling, and safety precautions.
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. Specific hazard statements are given in Section 6.
8.1 This test method covers the determination of the total alkalinity of 50 and 73 % liquid caustic soda, 45 % liquid caustic potash, and anhydrous caustic soda and caustic potash.
15.1 This test method describes the gas-volumetric determination of sodium carbonate or potassium carbonate in caustic soda or caustic potash respectively. The lower limit of determination is 0.001 g as carbon dioxide.
25.1 This test method covers the gravimetric determination of carbonate in caustic soda or caustic potash. The lower limit of determination is 0.001 g as carbon dioxide.
34.1 This test method covers the volumetric determination of chloride in caustic soda or caustic potash by the Volhard test method. The lower limit of determination is 0.001 g as chloride.
41.1 This test method was developed for the analysis of chloride in caustic soda and caustic potash. It covers the potentiometric titration of 0.3 to 1.2 % of chloride in caustic soda and caustic potash. This test method may be applied to other concentrations by using equivalent sample weights.
49.1 This test method was developed for the analysis of chloride in caustic soda and caustic potash. It covers the ion selective electrode determination of 1 to 120 μg/g chloride in caustic soda and caustic potash. This test method may be applied to other concentrations by using equivalent sample weights.
58.1 This test method covers the photometric determination of iron in caustic soda or caustic potash. The lower limit of determination is 0.1 μg/g as iron.
67.1 This test method covers the gravimetric determination of sulfate present in caustic soda or caustic potash. The lower limit of determination is 0.002 g.
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SIGNIFICANCE AND USE
4.1 The primary use of these test methods is testing to determine the specified mechanical properties of steel, stainless steel, and related alloy products for the evaluation of conformance of such products to a material specification under the jurisdiction of ASTM Committee A01 and its subcommittees as designated by a purchaser in a purchase order or contract.
4.1.1 These test methods may be and are used by other ASTM Committees and other standards writing bodies for the purpose of conformance testing.
4.1.2 The material condition at the time of testing, sampling frequency, specimen location and orientation, reporting requirements, and other test parameters are contained in the pertinent material specification or in a general requirement specification for the particular product form.
4.1.3 Some material specifications require the use of additional test methods not described herein; in such cases, the required test method is described in that material specification or by reference to another appropriate test method standard.
4.2 These test methods are also suitable to be used for testing of steel, stainless steel and related alloy materials for other purposes, such as incoming material acceptance testing by the purchaser or evaluation of components after service exposure.
4.2.1 As with any mechanical testing, deviations from either specification limits or expected as-manufactured properties can occur for valid reasons besides deficiency of the original as-fabricated product. These reasons include, but are not limited to: subsequent service degradation from environmental exposure (for example, temperature, corrosion); static or cyclic service stress effects, mechanically-induced damage, material inhomogeneity, anisotropic structure, natural aging of select alloys, further processing not included in the specification, sampling limitations, and measuring equipment calibration uncertainty. There is statistical variation in all aspects of mechanical testin...
SCOPE
1.1 These test methods2 cover procedures and definitions for the mechanical testing of steels, stainless steels, and related alloys. The various mechanical tests herein described are used to determine properties required in the product specifications. Variations in testing methods are to be avoided, and standard methods of testing are to be followed to obtain reproducible and comparable results. In those cases in which the testing requirements for certain products are unique or at variance with these general procedures, the product specification testing requirements shall control.
1.2 The following mechanical tests are described:
Sections
Tension
7 to 14
Bend
15
Hardness
16
Brinell
17
Rockwell
18
Portable
19
Impact
20 to 30
Keywords
32
1.3 Annexes covering details peculiar to certain products are appended to these test methods as follows:
Annex
Bar Products
Annex A1
Tubular Products
Annex A2
Fasteners
Annex A3
Round Wire Products
Annex A4
Significance of Notched-Bar Impact Testing
Annex A5
Converting Percentage Elongation of Round Specimens to
Equivalents for Flat Specimens
Annex A6
Testing Multi-Wire Strand
Annex A7
Rounding of Test Data
Annex A8
Methods for Testing Steel Reinforcing Bars
Annex A9
Procedure for Use and Control of Heat-cycle Simulation
Annex A10
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5 When these test methods are referenced in a metric product specification, the yield and tensile values may be determined in inch-pound (ksi) units then converted into SI (MPa) units. The elongation determined in inch-pound gauge lengths of 2 in. or 8 in. may be report...
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SIGNIFICANCE AND USE
4.1 This test method enumerates salt tolerant (halophilic) bacteria, and proteolytic bacteria that are also salt tolerant. Under the conditions of this test method those bacteria are equated as halophilic organisms. Salt tolerant proteolytic bacteria have been known to cause damage to hides and skins in raceway brine.
SCOPE
1.1 This test method covers the enumeration of bacteria that can tolerate high salt concentrations or can hydrolyze protein/collagen, or both. This test method is applicable to raceway brine, brine-cured hides and skins, and pre-charge raceway liquor.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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.
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SIGNIFICANCE AND USE
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5.2 This test method recognizes that differing geographical locations, environmental conditions, differences between surface temperatures and ambient temperatures, and test durations have extremely varied effects upon the test results.
5.3 This test method is to be used for comparative qualitative testing.
SCOPE
1.1 This test method covers out-of-doors exposure testing of finishes that are normally field-applied to thermal insulation and possibly include joints or joint sealants, or both. Such exposure is essential prior to the determination of certain physical properties when the finish is to be exposed to exterior weather conditions. This test method also indicates possible compatibility problems between the joint sealant and the finish as well as the ability of the finish to span a dry joint. This test method is not intended to evaluate mildew resistance, efflorescence, or chemical resistance.
Note 1: For testing free plastic films, see Practice D1435.
1.2 This test method does not prescribe the method of application, test duration, or inspection intervals.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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.
1.5 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.
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SIGNIFICANCE AND USE
4.1 The UNS provides a means of correlating many nationally used numbering systems currently administered by societies, trade associations, and individual users and producers of metals and alloys, thereby avoiding confusion caused by use of more than one identification number for the same material; and by the opposite situation of having the same number assigned to two or more entirely different materials. It also provides the uniformity necessary for efficient indexing, record keeping, data storage and retrieval, and cross referencing.
4.2 A UNS number is not in itself a specification, since it establishes no requirements for form, condition, quality, etc. It is a unified identification of metals and alloys for which controlling limits have been established in specifications published elsewhere.
Note 5: Organizations that issue specifications should report to appropriate UNS number-assigning offices (3.1.2) any specification changes that affect descriptions shown in published UNS listings.
SCOPE
1.1 This practice (Note 1) covers a unified numbering system (UNS) for metals and alloys that have a “commercial standing” (see Note 2), and covers the procedure by which such numbers are assigned. Section 2 describes the system of alphanumeric designations or “numbers” established for each family of metals and alloys. Section 3 outlines the organization established for administering the system. Section 5 describes the procedure for requesting number assignment to metals and alloys for which UNS numbers have not previously been assigned.
Note 1: UNS designations are not to be used for metals and alloys that are not registered under the system described herein, or for any metal or alloy whose composition differs from those registered.
Note 2: The terms “commercial standing,” “production usage,” and other similar terms are intended to apply to metals and alloys in active commercial production and use, although the actual amount of such use will depend, among other things, upon the type of metals and alloys involved and their application.
The various standardizing organizations involved with the individual industries apply their own established criteria to define the status of a metal or alloy in terms of when a UNS designation number will be assigned. For instance, ASTM Committee A01 requires details of heat analysis, mechanical properties, and processing requirements for addition of a new grade or alloy to its specifications. The Copper Development Association requires that the material be “in commercial use (without tonnage limits);” the Aluminum Association requires that the alloy be “offered for sale (not necessarily in commercial use);” the SAE Aerospace Materials Division calls for “repetitive procurement by at least two users.”
Thus, while no universal definition for usage criteria is established, the UNS numbers are intended to identify metals and alloys that are generally in regular production and use. A UNS number will not ordinarily be issued for a material that has just been conceived or that is still in only experimental trial.
1.2 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.
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