This specification covers hot-rolled and cold-rolled steel sheet coated by the electrolytic process. Coatings can be comprised of pure metals or metal alloys. The product shall be coated on one or both surfaces with equal or differential coating masses on the two surfaces. The following seven-character format shall be used to identify the coating mass required: first and second characters; third character; fifth and fourth characters; sixth character; and seventh character. Heat analysis of the steel shall conform to the chemical requirements of the specification of the steel. Coating mass tests shall include weigh-strip-weigh method, X-ray fluorescence, Coulometric method, and referee method. Structural steel such as cold-rolled and hot-rolled sheets, shall also undergo coating bend test and shall conform with the bend test requirements.1.1 This specification covers hot-rolled and cold-rolled steel sheet coated by the electrolytic process. Coatings can be comprised of pure metals or metal alloys. For specific coatings, refer to Specifications A879/A879M and A918.1.2 The product shall be coated on one or both surfaces with equal or differential coating masses on the two surfaces. Sheet-coated with equal coating masses on each surface has similar levels of corrosion protection on each surface. Often, however, a higher level of corrosion protection is required on one surface than is required on the other. In these situations, one surface shall be specified with a heavier coating mass than the other. Either surface, when specified to be painted, will provide additional corrosion protection as compared to an unpainted surface.1.3 This coating process has essentially no effect on the base metal mechanical properties, and use is permitted on any grade of hot-rolled or cold-rolled steel sheet. The coated sheet is available as Commercial Steel (CS), Drawing Steel (DS), Deep Drawing Steel (DDS), Extra-Deep Drawing Steel (EDDS), Structural Steel (SS) High-Strength Low-Alloy Steel (HSLAS), High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F), Solution-Hardened Steel (SHS), or Bake-Hardenable Steel (BHS).1.4 The values stated in SI units are to be regarded as the standard.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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This specification covers zinc-nickel alloy coatings applied by the electrolytic process to hot-rolled and cold-rolled steel sheets for applications requiring designation of the coating mass on each surface. Coating application shall be done on one or both surfaces with equal or differential coating masses and similar levels of corrosion protection, and shall have no effect on the base metal mechanical properties. The coated sheets may be available as commercial steel (CS), drawing steel (DS), deep drawing steel (DDS), extra-deep drawing steel (EDDS), structural steel (SS), high-strength low-alloy steel (HSLAS), high-strength low-alloy steel with improved formability (HSLAS-F), solution-hardened steel (SHS), or bake-hardenable steel (BHS). Coatings shall be designated accordingly, and shall undergo test methods such as weigh-strip-weigh method, and nondestructive X-ray fluorescence measurement. Individual coating designations should conform to coating mass, thickness, and composition requirements.1.1 This specification covers zinc-nickel alloy coatings applied by the electrolytic process to hot-rolled and cold-rolled steel sheet. The coating has a smooth, spangle-free surface. The zinc-nickel-coated sheet covered in this specification is produced in a range of coating masses to provide coatings that are compatible with the anticipated service life required. The coating mass varies, from very thin coatings that are usually painted to provide good service, to relatively heavy masses that provide good corrosion resistance in the bare (unpainted) condition. The composition range is from 9 to 16 % nickel, by weight, with the balance being zinc.1.2 The product shall be coated on one or both surfaces with equal or differential coating masses on the two surfaces. Sheet coated with equal coating masses on each surface has similar levels of corrosion protection on each surface. Often, however, a higher level of corrosion protection is required on one surface than is required on the other. In these situations, one surface shall be specified with a heavier coating mass than the other. Either surface, when specified to be painted, will provide additional corrosion protection as compared to an unpainted surface.1.3 This coating process has essentially no effect on the base metal mechanical properties, and use is permitted on any grade of hot- or cold-rolled steel sheet. The coated sheet is available as Commercial Steel (CS), Drawing Steel (DS), Deep Drawing Steel (DDS), Extra-Deep Drawing Steel (EDDS), Structural Steel (SS), High-Strength Low-Alloy Steel (HSLAS), High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F), Solution-Hardened Steel (SHS), or Bake-Hardenable Steel (BHS).1.4 The values stated in SI units are to be regarded as the standard.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.

定价： 515元 / 折扣价： 438 元 加购物车

6.1 The two orders of notation are presented to satisfy two separate needs encountered in the textile industry and in textile technology. The single-to-ply notation meets the needs of yarn manufacturers to describe a single yarn, or a plied or cabled yarn primarily in terms of its manufacturing specifications. The ply-to-single notation, based on the resultant yarn number, meets the needs of users of yarn who have relatively little interest in the linear density or twist of the single yarn component(s) but are interested mainly in the final product. The chief difference between the two notations is the order in which the information is presented. In this practice the same symbols are used for both notations and retain their usual mathematical meanings.6.2 The single-to-ply notation is prescribed for yarns numbered in both direct and indirect yarn numbering systems and conforms with current usage in large sections of the textile industry. The ply-to-single notation is prescribed for yarns numbered in a direct yarn numbering system and its use is approved by the ISO/TC 38 in Document N362. This latter notation has not been included previously in Practice D1244. The ply-to-single notation has not been recommended for use with yarns numbered in indirect yarn numbering systems because of possible confusion when symbols are used with different meanings in different notations or used in conflict with their established mathematical significance.6.3 At first glance, the recommended notation may appear rather involved, but in actuality it is a concise method for describing complex structures. For example, compare the following description of a yarn: “A cabled yarn or cord with a resultant cotton count of 1.4 and 5 turns per inch of Z twist made from 3 strands of plied yarn with 9 turns per inch of S twist each plied from 5 strands of 24 cotton count yarn with 15 turns per inch of Z twist and spun from 11/16 in. staple, graded strict low middling, and having a Micronaire reading of 4.3” with the description of the same yarn stated in Example 23,  24 Nec Z 15 tpi (cotton, 11/16 in., SLM, 4.3 Micronaire Reading) /5 S 9 tpi/3 Z 5 tpi; R 1.4 c.c. (23)6.4 ASTM recommends (see Practice D861), the general use of the tex universal yarn numbering system.6.5 The designation of a numbering system, for example, cotton count, woolen run, and linen lea, does not restrict the yarn composition to the named fiber. See Example 5.6.6 The terms used to designate different yarn numbering systems are frequently abbreviated. See 4.13 – 4.16.6.7 The various yarn numbering units (cotton count, tex, etc.) should be carefully distinguished from the property which has been designated as linear density. This last term covers the concept of size or fineness. The distinction is comparable to the use of the units, (litres or gallons), to express a property such as the volume of an object.1.1 This practice covers instructions for the designation of yarn construction and is applicable to single yarns, plied yarns, and cabled yarns or cords of filaments or spun fibers. The application of the practice to specific cases is illustrated with examples. This practice does not cover the description of novelty yarns or core spun yarns of various types.1.2 The primary purpose of this practice is to establish a reference system for use in the trade and particularly for use in correspondence and publications. To secure a simplified notation, certain portions may be omitted provided there is no doubt as to the omitted parts.1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this 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.

定价： 590元 / 折扣价： 502 元 加购物车

5.1 The RQD was first introduced in the mid 1960s to provide a simple and inexpensive general indication of rock mass quality to predict tunneling conditions and support requirements. The recording of RQD has since become virtually standard practice in drill core logging for a wide variety of geotechnical explorations.5.2 The use of RQD values has been expanded to provide a basis for making preliminary design and constructability decisions involving excavation for foundations of structures, or tunnels, open pits, and many other applications. The RQD values also can serve to identify potential problems related to bearing capacity, settlement, erosion, or sliding in rock foundations. The RQD can provide an indication of rock quality in quarries for issues involving concrete aggregate, rockfill, or large riprap.5.3 The RQD has been widely used as a warning indicator of low-quality rock zones that may need greater scrutiny or require additional borings or other investigational work. This includes rocks with certain time-dependent qualities that by determining the RQD again after 24 h, under well-controlled conditions, can assist in determining durability.5.4 The RQD is a basic component of many rock mass classification systems, such as rock mass rating (RMR) and Q-System, for engineering purposes. See D5878 and 2,3.5.5 When needed, drill holes in different directions can be used to determine the RQD in three dimensions.5.6 The concept of RQD can be used on any rock outcrop or excavation surface using line surveys as well. However, this topic is not covered by this standard.NOTE 2: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.1.1 This test method covers the determination of the rock quality designation (RQD) as a standard parameter in drill core logging of a core sample in addition to the commonly obtained core recovery value (Practice D2113); however there may be some variations between different disciplines, such as mining and civil projects.1.2 This standard does not cover any RQD determinations made by other borehole methods (such as acoustic or optical televiewer) and which may not give the same data or results as on the actual core sample(s).1.3 There are many drilling and lithologic variations that could affect the RQD results. This standard provides examples of many common and some unusual situations that the user of this standard needs to understand to use this standard and cannot expect it to be all inclusive for all drilling and logging scenarios. The intent is to provide a baseline of examples for the user to take ownership and watch for similar, additional or unique geological and procedural issues in their specific drilling programs.1.4 This standard uses the original calculation methods by D.U. Deere to determine an RQD value and does not cover other calculation or analysis methods; such as Monte Carlo.1.5 The RQD in this test method only denotes the percentage of intact and sound rock in a core interval, defined by the test program, and only of the rock mass in the direction of the drill hole axis, at a specific location. A core interval is typically a core run but can be a lithological unit or any other interval of core sample relevant to the project.1.6 RQD was originally introduced for use with conventional drilling of N-size core with diameter of 54.7 mm (2.155 in.). However, this test method covers all types of core barrels and core sizes from BQ to PQ, which are normally acceptable for measuring determining RQD as long as proper drilling techniques are used that do not cause excess core breakage or poor recovery, or both. See 6.3 for more information on this issue.1.7 Only the RQD classification which correlates with the common tunneling classification that was presented by Deere2,3 is covered in this test method. Other classification systems are not covered specifically but are mentioned in general and if used shall not be regarded as nonconformance with this standard.1.8 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.1.8.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which the data can be applied in design or other uses, or both. How one applies the results obtained using this standard is beyond its scope.1.9 The values stated in either SI units or inch-pound units [rational values are given in brackets] are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.1.10 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.1.11 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.

定价： 590元 / 折扣价： 502 元 加购物车

This specification covers the method of determining and designating the balance point location of an arrow assembly for use with an archery bow. The base for determining the percentage location of the balance point of the arrow assembly shall be the ATA (Archery Trade Association) arrow length. When the balance point of the arrow is determined, the arrow assembly shall be complete with all components, including the arrow point in place and mounted securely ready for shooting. In determining the balance point, the arrow assembly shall be placed on a knife edge and moved longitudinally until perfect balance is achieved. The FOC (front of center) shall be measured as follows: from the bottom of nock slot, measure the distance from the bottom of the nock slot to the balance point; or from the front of the shaft assembly, measure the distance from the designated point to the balance point. The percent FOC shall be calculated using the specified formula. The following arrow assemblies are illustrated: (1) arrow assembly employing an interchangeable point insert (2) arrow assembly having the front end of the shaft tapered or swaged, (3) arrow assembly incorporating an outsert, and (4) arrow assembly with a head that has an integral cylindrical socket.1.1 This specification covers the method of determining and designating the location of the balance point of an arrow assembly for use with an archery bow.1.2 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.

定价： 0元 / 折扣价： 0 元

This practice is intended as a reference for spectrochemical methods that utilize graphite electrodes. Methods should employ and reference one of the electrode shapes in this practice, but if this is not possible, the method should include electrode specifications for the specific shape used.This practice should be referred to in a method by including a statement such as the following in the section on Reagents and Materials:Graphite Electrodes—The electrode(s) shall be of high-purity graphite and conform to type(s) (insert designation from this method) as depicted in Practice E 130.1.1 This practice covers a number of specific graphite electrode shapes and sizes that are useful in spectrochemical analysis.1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

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This specification covers the requirements for zinc coatings applied by the electrolytic process to any grade of hot-rolled or cold-rolled steel sheets for applications requiring designation of the coating mass on each surface. Coating application shall be done on one or both surfaces with equal or differential coating masses and similar levels of corrosion protection, and shall have no effect on the base metal mechanical properties. The coated sheets may be available as commercial steel (CS), drawing steel (DS), deep drawing steel (DDS), extra-deep drawing steel (EDDS), structural steel (SS), high-strength low-alloy steel (HSLAS), high-strength low-alloy steel with improved formability (HSLAS-F), solution-hardened steel (SHS), or bake-hardenable steel (BHS). Coatings shall be designated accordingly, and shall undergo test methods such as weigh-strip-weigh method, nondestructive X-ray fluorescence measurement, and Coulometric method. Accordingly, individual coating designations should conform to coating weight, mass per surface, and thickness requirements.1.1 This specification covers zinc coatings applied by the electrolytic process to hot-rolled and cold-rolled steel sheet. The coating has a smooth, spangle-free surface. The zinc-coated sheet covered in this specification is produced in a wide range of coating masses to provide coatings that are compatible with the anticipated service life required. The coating mass varies, from very thin coatings that are usually painted to provide good service, to relatively heavy masses that provide good corrosion resistance in the bare (unpainted) condition.1.2 The product shall be coated on one or both surfaces with equal or differential coating masses on the two surfaces. Sheet coated with equal coating masses on each surface has similar levels of corrosion protection on each surface. Often, however, a higher level of corrosion protection is required on one surface than is required on the other. Thus, one surface is specified to have a heavier coating mass than the other. Either surface, when specified to be painted, will provide additional corrosion protection as compared to an unpainted surface.1.3 This coating process has essentially no effect on the base metal mechanical properties and use is permitted on any grade of hot- or cold-rolled steel sheet. The coated sheet is available as Commercial Steel (CS), Drawing Steel (DS), Deep Drawing Steel (DDS), Extra-Deep Drawing Steel (EDDS), Structural Steel (SS), High-Strength Low-Alloy Steel (HSLAS), High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F), Solution-Hardened Steel (SHS), Bake-Hardenable Steel (BHS), Required Hardness Steel (RHS), or Special Forming Steel (SFS); see Specifications A1008/A1008M and A1011/A1011M.1.4 Ordered dimensions are specified based on the finished coated steel sheet product and all dimensional tolerances are defined per Specification A568/A568M, Section 8.1.5 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.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.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.

定价： 515元 / 折扣价： 438 元 加购物车