本标准规定了利用Si（111）晶面原子台阶高度样品校准原子力显微镜z向标度的测量方法。
本标准适用于在大气或真空环境下工作的原子力显微镜，并且其z向放大倍率达到最大量级，即z向位移在纳米和亚纳米范围内，这是原子力显微镜用于检测半导体表面，光学器件表面和其他高科技元件表面中经常用到的检测范围。
本标准并未指出所有可能的安全问题，在应用本标准之前，使用者有责任采取适当的安全和健康措施，并保证符合国家有关法规规定的条件。

定价： 31元 / 折扣价： 27 元 加购物车

本标准规定了低合金钢和碳钢中低含量Si、Mn的电子探针定量分析方法，即标定曲线法。 本标准适用于带波谱仪的扫描电镜。

定价： 29元 / 折扣价： 25 元 加购物车

定价： 22元 / 折扣价： 19 元 加购物车

定价： 19元 / 折扣价： 17 元 加购物车

定价： 190元 / 折扣价： 162 元 加购物车

定价： 333元 / 折扣价： 284 元 加购物车

定价： 319元 / 折扣价： 272 元 加购物车

定价： 114元 / 折扣价： 97 元

定价： 333元 / 折扣价： 284 元 加购物车

定价： 110元 / 折扣价： 94 元 加购物车

定价： 156元 / 折扣价： 133 元 加购物车

This document is the primary American National Standard on application of the metric system. It emphasizes use of the International System of Units (SI), which is the modern, internationally accepted metric system. It includes information on SI, a limited list of units recognized for use with SI, and a list of conversion factors, together with general guidance on style and usage. It also lists older "metric" units that shall no longer be used. The word primary implies that other metric standards in the United States should be consistent with this document.

定价： 983元 / 折扣价： 836 元 加购物车

This practice covers the use of the International System of Units (SI) in maritime applications as well as non-SI units commonly used and accepted for use with SI units. This practice is intended to establish uniform SI practice in the maritime industry. Covered in this practice are the concept of SI, the two units comprising SI (namely, base and derived SI units), SI prefixes, basic rules for style and usage of SI as well as methods for rounding and conversion of non-SI units to SI units. Conversion factors for quantities commonly used in the maritime industry are also provided.1.1 This practice covers the use of SI, which is comprised of base and derived SI units. Also discussed are non-SI units that have been accepted and recognized by the CGPM as appropriate for limited use or time. Basic rules for style and usage of SI are set forth, as well as methods for conversion from non-SI units to SI units. Tables of quantities used by the marine industry are included, with present units and conversion factors given.

定价： 0元 / 折扣价： 0 元

定价： 0元 / 折扣价： 0 元

This specification covers alloys UNS N08925, UNS N08031, UNS N08932, UNS N08926, UNS N08354, and UNS R20033 plate, sheet, and strip in the annealed temper. The alloys shall conform to the required chemical composition such as carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, copper, nitrogen, and iron. The alloys shall also conform to the required mechanical properties such as tensile strength, yield strength, elongation, and Rockwell hardness.1.1 This specification covers nickel-iron-chromium-molybdenum-copper-nitrogen low-carbon alloy, nickel-iron-chromium-silicon alloy, chromium-nickel-iron-nitrogen low-carbon alloy, iron-nickel-chromium-molybdenum-copper-nitrogen alloy, and nickel-iron-chromium-molybdenum-nitrogen alloy plate, sheet, and strip in the annealed temper.1.2 ASTM International has adopted definitions whereby some grades, such as UNS N08904, previously in this specification were recognized as stainless steels, because those grades have iron as the largest element by mass percent. Such grades are under the oversight of ASTM Committee A01 and its subcommittees. The products of N08904 previously covered in this specification are now covered by Specifications A240/A240M and A480/A480M.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 become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, 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