Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM B970-09
• Năm ban hành / Publication date: 2009
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Cleanliness of Powder Metallurgy (PM) Bearings and Structural Parts (Withdrawn 2016)
• Chỉ số phân loại Quốc tế (ICS) / By field: 21.100.01 - Ổ đỡ nói chung
• Số trang / Page: 3

Phạm vi áp dụng / Scope of standard

1.1 This test method covers a quantitative procedure to determine the cleanliness of PM bearings and structural parts.    

1.2 This is a laboratory test consisting of cleaning sample parts under controlled conditions and calculating the amount or percent of residue from the mass of the removed contaminants.

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.