NF H60-200-2008 包装.食品用包装的生产卫生管理.要求

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下一篇: NF A91-145-2008 金属和其他无机涂层.孔隙率的相关定义和常规

标准名称：	光谱辐射亮度 光谱辐射照度计量器具检定系统
英文名称：	Measuring Instruments for Spectral Radianceand Irradiance
中标分类：	综合 >> 计量 >> 光学计量
替代情况：	被JJG 2083-2005代替
发布日期：
实施日期：	1991-05-01
首发日期：
作废日期：	2005-06-03
出版日期：
页数：	7页

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Product Code:SAE J380
Title:Specific Gravity of Friction Material
Issuing Committee:Brake Linings Standards Committee
Scope:Specific gravity is a nondestructive test used as a quality control check of the consistency of formulation and processing of brake lining. Specific gravity alone shows nothing about a lining's ability to develop friction or to resist fade when used as a friction element in brakes. Specific gravity varies with the formulation of the lining. The specific gravity of sintered metal powder linings, particularly those which have steel backing members, is usually determined somewhat differently. Reference ASTM B 376. The specific gravity and the range of specific gravity are peculiar to each formulation and, therefore, the acceptable values or range must be established for each formulation by the manufacturer.