定价： 646元 / 折扣价： 550 元 加购物车

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This practice covers the requirements for the heat treatment of aluminum alloy castings from any casting process such as investment casting, permanent mould casting, sand casting, and others. It excludes castings that are used in specific aerospace applications or those made from wrought aluminum alloys. The aluminum alloys should be subjected to controlled heat treatment using the usual air chamber furnace or other heating media like lead baths, oil baths, fluidized beds, or even superheated steam. Air chambers may be oil or gas fired or may also be electrically heated but the atmosphere inside each should be controlled to prevent porosity. Quenching is normally performed by immersing castings in a hot-water bath. It is important that the furnace be calibrated before it is used initially and after any change in the furnace. Likewise, temperature-measurement systems should be regularly checked for accuracy.1.1 This practice covers, when specified by material specification or purchase order, the heat treatment of aluminum alloy castings from all casting processes.1.1.1 The heat treatment of aluminum alloy castings used in specific aerospace applications is covered in AMS 2771 and specific AMS material specifications.1.1.2 The heat treatment of wrought aluminum alloys is covered in Practice B918/B918M.1.2 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.1.3 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.

定价： 646元 / 折扣价： 550 元 加购物车

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5.1 These procedures can be used to generate microplastic particles as a simulation of microplastic particles found in the natural environment. Suitable uses may include evaluation of microplastic detection and imaging methods. Use of reference samples will support estimation of ambient and flux concentrations in drinking water, wastewater and natural environments, investigations of microplastic particle degradation, and ingestion of microplastics by animals in the contexts of food safety and human health risk assessment.1.1 This practice describes manufacturing methods to create microplastic particles from pellets of common polymers and the preparation of microplastic reference samples for calibration and proficiency evaluation of microplastic collection practices, preparation practices, and identification methods.1.2 This practice does not describe methods for controlling or characterizing the shapes of particles. The procedures have been observed to yield irregularly shaped particles, the use of which in many cases will serve to remove the analytical bias inherent with using distinctive manufactured spherical beads. Other procedures should be used if spheres or elongated fibers are desired.1.3 This practice does not describe handling procedures for waste generated when executing the procedures described herein. It is the responsibility of the user of this practice to follow applicable laws and regulations when manufacturing and disposing of microplastic particles, and to establish appropriate procedures to minimize the amount of waste generated.1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.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.

定价： 590元 / 折扣价： 502 元 加购物车

4.1 These test methods for the chemical analysis of metals and alloys are primarily intended as referee methods to test such materials for compliance with compositional specifications, particularly those under the jurisdiction of ASTM Committee A04 on Iron Castings. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory under appropriate quality control practices such as those described in Guide E882.1.1 These test methods cover the chemical analysis of pig iron, gray cast iron (including alloy and austenitic), white cast iron, malleable cast iron, and ductile (nodular) iron having chemical compositions within the following limits:Element Composition Range, % Aluminum 0.003 to  0.50Antimony 0.005 to  0.03Arsenic 0.02  to  0.10Bismuth 0.001 to  0.03Boron 0.001 to  0.10Cadmium 0.001 to 0.005Carbon 1.25  to  4.50Cerium 0.005 to  0.05Chromium 0.01  to 30.00Cobalt 0.01  to  4.50Copper 0.03  to  7.50Lead 0.001 to  0.15Magnesium 0.002 to  0.10Manganese 0.06  to  2.50Molybdenum 0.01  to  5.00Nickel 0.01  to 36.00Phosphorus 0.01  to  0.90Selenium 0.001 to  0.06Silicon 0.10 to 6.0   Sulfur 0.005 to  0.25Tellurium 0.001 to  0.35Tin 0.001 to  0.35Titanium 0.001 to  0.20Tungsten 0.001 to  0.20Vanadium 0.005 to  0.50Zinc 0.005 to  0.201.2 The test methods in this standard are contained in the sections indicated below:  Sections Carbon, Graphitic, by the Direct Combustion Infrared Absorption Method (1 % to 3 %) 108–115Carbon, Total by the Combustion Gravimetric Method (1.25 % to 4.50 %)—Discontinued 2012  97–107Cerium and Lanthanum by the Direct Current Plasma Atomic Emission Spectrometry Method (Ce: 0.003 % to 0.5 %; La: 0.001 % to 0.30 %) 237–245Chromium by the Atomic Absorption Method (0.006 % to 1.00 %) 208–217Chromium by the Peroxydisulfate Oxidation—Titration Method (0.05 % to 30.0 %) 218–226Chromium by the Peroxydisulfate-Oxidation Titrimetric Method (0.05 % to 30.0 %)—Discontinued 1980 144–151Cobalt by the Ion-Exchange—Potentiometric Titration Method (2.0 % to 4.5 %)  53–60Cobalt by the Nitroso-R-Salt Spectrophotometric Method (0.01 % to 4.50 %)  61–70Copper by the Neocuproine Spectrophotometric Method (0.03 % to 7.5 %) 116–125Copper by the Sulfide Precipitation-Electrodeposition Gravimetric Method (0.03 % to 7.5 %)  81–88Lead by the Ion-Exchange—Atomic Absorption Spectrometry Method (0.001 % to 0.15 %) 126–135Magnesium by the Atomic Absorption Spectrometry Method (0.002 % to 0.10 %)  71–80Manganese by the Periodate Spectrophotometric Method (0.10 % to 2.00 %)   9–18Manganese by the Peroxydisulfate-Arsenite Titrimetric Method (0.10 % to 3.5 %) 152–159Molybdenum by the Ion Exchange–8-Hydroxyquinoline Gravimetric Method 257–264Molybdenum by the Thiocyanate Spectrophotometric Method (0.01 % to 1.5 %) 196–207Nickel by the Dimethylglyoxime Gravimetric Method (0.1 % to 36.00 %) 168–175Nickel by the Ion Exchange-Atomic Absorption Spectrometry Method (0.005 % to 1.00 %) 176–185Phosphorus by the Alkalimetric Method (0.02 % to 0.90 %) 160–167Phosphorus by the Molybdenum Blue Spectrophotometric Method (0.02 % to 0.90 %)  19–30Silicon by the Gravimetric Method (0.1 % to 6.0 %)  46–52Sulfur by the Gravimetric Method—Discontinued 1988  30–36Sulfur by the Combustion-Iodate Titration Method (0.005 % to 0.25 %)—Discontinued 2012  37–45Sulfur by the Chromatographic Gravimetric Method—Discontinued 1980 136–143Tin by the Solvent Extraction-Atomic Absorption Spectrometry Method (0.002 % to 0.10 %)  186–195Tin by the Sulfide Precipitation-Iodometric Titration Method (0.01 % to 0.35 %)   89–96Titanium by the Diantipyrylmethane Spectrophotometric Method (0.006 % to 0.35 %)  246–256Vanadium by the Atomic Absorption Spectrometry Method (0.006 % to 0.15 %)  227–2361.3 Procedures for the determination of carbon and sulfur not included in these test methods can be found in Test Methods E1019.1.4 Some of the composition ranges given in 1.1 are too broad to be covered by a single method and therefore this standard contains multiple methods for some elements. The user must select the proper method by matching the information given in the and Interference sections of each method with the composition of the alloy to be analyzed.1.5 The values stated in SI units are to be regarded as standard.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 hazards statements are given in Section 6 and in special “Warning” paragraphs throughout these Methods.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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定价： 590元 / 折扣价： 502 元 加购物车

4.1 Fabrics intended for rainwear and all-purpose, water-repellent coat end use should meet all of the requirements listed in Table 1 of this specification.(A) See Note 6.4.2 It should be recognized that fabric can be produced utilizing an almost infinite number of combination of construction variables (for example, type of fibers, percentage of fibers, yarn twist, yarn number, warp and pick count, chemical and mechanical finishes). Additionally, fashion or aesthetics dictate that the ultimate consumer may find acceptable articles made from fabrics that do not conform to all of the requirements in Table 1.4.2.1 Hence, no single performance specification can possibly apply to all the various fabrics that could be utilized for this end-use.4.3 The uses and significance of particular properties and test methods are discussed in the appropriate sections of the specified test methods.AbstractThis performance specification covers rainwear and all-purpose water-repellent coat outer fabrics. Fabrics may compose of any textile fiber or mixture of textile fibers. This standard performance is not applicable for fabrics used for linings and interlinings. Fabrics for this purpose shall be tested and meet the following requirements: breaking strength, resistance to yarn slippage, tearing strength, bursting strength, dimensional change, colorfastness, water repellency, water resistance, fabric appearance, and flammability.1.1 This performance specification covers rainwear and all-purpose water-repellent coat outer fabrics composed of any textile fiber or mixture of textile fibers.1.2 This performance specification is not applicable to fabrics used for linings and interlinings.1.3 These requirements apply to the length and width directions for those properties where fabric direction is pertinent.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： 515元 / 折扣价： 438 元 加购物车

1.1 This specification establishes requirements for safety covers for swimming pools, spas, hot tubs, and wading pools (hereinafter referred to as pools, unless otherwise specified). When correctly installed and used in accordance with the manufacturer's instructions, this specification is intended to reduce the risk of drowning by inhibiting the access of children under five years of age to the water.1.2 This specification includes performance tests to demonstrate the compliance or noncompliance to requirements herein stated for safety covers. It also includes marking requirements for all covers.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 The following safety hazards caveat pertains only to the test methods section, Section 9, of this specification: 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

These test methods can be used by buyers of vacuum cleaner hose to specify the test criteria the hose must meet to be acceptable for their purposes.1.1 These test methods cover the determination of the effect of anticipated stresses and strains that vacuum cleaner hoses will receive in normal use.1.2 These test methods apply to all-plastic, nonelectric vacuum cleaner hoses for household use.Note 1—For information on plastic wire-reinforced, nonelectric vacuum cleaner hoses for household use, refer to Test Method F 450.1.3 These test methods are individual tests as agreed upon between the hose manufacturer and the vacuum cleaner manufacturer.1.4 The following tests are included: SectionTorsional flex 6Hot and cold flex with aging (optional) 7Abrasion (external surface) (optional) 8Flex 9Pull test on hose fittings with aging 10Crush 111.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathmatical conversions to SI units, which are provided for information only and are not considered standard.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.

定价： 0元 / 折扣价： 0 元

定价： 590元 / 折扣价： 502 元 加购物车

定价： 0元 / 折扣价： 0 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车