Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM E581-17a
• Năm ban hành / Publication date: 2017
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Methods for Chemical Analysis of Manganese-Copper Alloys
• Số trang / Page: 6
• Phạm vi áp dụng / Scope of standard: 1.1 These test methods cover the chemical analysis of manganese-copper alloys having chemical compositions within the following limits: Element Range, % Copper 68.0 to 72.0 Manganese 28.0 to 32.0 Carbon 0.03 max Iron 0.01 max Phosphorus 0.01 max Silicon 0.05 max Sulfur 0.01 max 1.2 The test methods appear in the following order: Sections Iron by the 1,10-Phenanthroline Spectrophotometric Method [0.003 % to 0.02 %] 11 - 20 Manganese by the (Ethylenedinitrilo) Tetraacetic Acid (EDTA)- Back-Titrimetric Method [28 % to 32 %] 21 - 27 Phosphorus by the Molybdivanadophosphoric Acid Extraction Spectrophotometric Method [0.002 % to 0.014 %] 28 - 38 1.3 The values stated in SI 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 and health 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.