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ASTM E1004-2002 用电磁(涡流)法测定电导率的标准实施规程
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【英文标准名称】: Standard Practice for Determining Electrical Conductivity Using the Electromagnetic (Eddy-Current) Method
【原文标准名称】: 用电磁(涡流)法测定电导率的标准实施规程
【标准号】: ASTM E1004-2002
【标准状态】: 现行
【国别】:
【发布日期】: 2002
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: E07.07
【标准类型】: (Practice)
【标准水平】: ()
【中文主题词】:
【英文主题词】: eddy-current; electrical conductivity; metal sorting; nondestructive testing
【摘要】: Absolute probe coil methods, when used in conjunction with reference standards of known value, provide a means for determining the electrical conductivity of nonmagnetic materials. Electrical conductivity of a sample can be used as a means of determining: (1) type of metal or alloy, (2) type of heat treatment (for aluminum this evaluation should be used in conjunction with a hardness examination), (3) aging of the alloy, (4) effects of corrosion, and (5) heat damage.1.1 This practice covers a procedure for determining the electrical conductivity of nonmagnetic metals using the electromagnetic (eddy-current) method. The procedure has been written primarily for use with commercially available direct reading electrical conductivity instruments. General purpose eddy-current instruments may also be used for electrical conductivity measurements but will not be addressed in this practice.1.2 This practice is applicable to metals that have either a flat or slightly curved surface and includes metals with or without a thin nonconductive coating.1.3 Eddy-current determinations of electrical conductivity may be used in the sorting of metals with respect to variables such as type of alloy, aging, cold deformation, heat treatment, effects associated with non-uniform heating or overheating, and effects of corrosion. The usefulness of the examinations of these properties is dependent on the amount of electrical conductivity change caused by a change in the specific variable.1.4 Electrical conductivity, when evaluated with eddy-current instruments, is usually expressed as a percentage of the conductivity of the International Annealed Copper Standard (IACS). The conductivity of the Annealed Copper Standard is defined to be 0.58108 S/m (100 % IACS) at 20176;C.1.5 The values stated in SI units are 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 and health practices and determine the applicability of regulatory limitations prior to use.
【中国标准分类号】: A55
【国际标准分类号】: 17_220_20 (MEASUREMENT OF ELECTRICAL AND MAGNETIC QUANTITIES)
【页数】: 4P.;A4
【正文语种】:

关键字: ASTM E100

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