【英文标准名称】:Plastics--Determinationofdynamicmechanicalproperties--Part2:Torsion-pendulummethod
【原文标准名称】:塑料制品.动态机械性能的测定.第2部分:扭摆法
【标准号】:JISK7244-2-1998
【标准状态】:现行
【国别】:日本
【发布日期】:1998-11-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonChemicalProducts
【标准类型】:()
【标准水平】:()
【中文主题词】:材料力学性能;机械试验;扭转试验;材料强度;扭摆;塑料
【英文主题词】:mechanicalbehaviourofmaterials;strengthofmaterials;mechanicaltesting;torsionpendulums;torsiontesting
【摘要】:この規格は,周彼数範囲0.1Hz~10Hzにおける小変形に対するプラスチックの線形動的機械特性,すなわち,ねじり弾性率の貯蔵及び損失成分を温度の関数として測定する二つの方法(A法及びB法という。)について規定する。…
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:13P;A4
【正文语种】:日语
基本信息
| 标准名称： | 电热设备基本技术条件 第二部分 炼钢电弧炉 |
| 英文名称： | Basic specifications for electroheat installations-Steelmaking arc furnaces |
| 中标分类： |
电工 >>
电气设备与器具 >>
工业电热设备 |
| ICS分类： |
机械制造 >>
工业炉 >>
电炉
|
| 替代情况： | JB 2529-1979;被GB/T 10067.2-2005代替 |
| 发布部门： | 中国电器工业协会 |
| 发布日期： | 1988-12-10 |
| 实施日期： | 1989-07-01 |
| 首发日期： | 1988-12-10 |
| 作废日期： | 2006-04-01 |
| 主管部门： | 中国电器工业协会 |
| 归口单位： | 全国工业电热设备标准化技术委员会 |
| 起草单位： | 西安电炉研究所 |
| 出版日期： | 1900-01-01 |
| 页数： | 0 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 电工 电气设备与器具 工业电热设备 机械制造 工业炉 电炉
Product Code:SAE J1787
Title:Measurement of the Total Ash Content of Aviation Piston Engine Oils by a Calculation Method
Issuing Committee:E-38, Aviation Piston Engine Fuels And Lubricants
Scope:This SAE Recommended Practice describes an empirical method for determining the theoretical ash content of aviation piston engine lubricating oils by calculating the equivalent weight of metallic oxides formed at 775 掳C based on the metallic elemental concentration.The calculation method of ash determination may be used as an alternate to ASTM D 482 for application to the standards for aviation piston engine lubricating oils.Field of ApplicationThis procedure is recommended for use in the qualification, manufacturing, and quality assurance testing of aviation piston engine lubricating oils where the ash content is limited to a maximum of 0.011%.BackgroundThe ash content as measured by ASTM D 482 has very poor precision and repeatability for lubricants having low ash content. The precision statement for the method states that the reproducibility of a sample in the range of 0.001 to 0.079% ash content is 0.005%. Further, the bias of the test cannot be determined and there is no standard reference material containing a known level of ash for this method. This poor precision has led to numerous problems concerning the actual ash content of products on many occasions. The test method is valuable when run by experienced operators, but can provide dubious information if run under the general conditions stated in the method. For example, to obtain repeatable results, a platinum crucible must always be used in place of the silica or porcelain crucibles listed as equivalent substitutes. Meticulous care and procedural knowledge must be used by experienced operators for the method to be productive.The notes provided in ASTM D 482 also suggest that this method may not be appropriate for oils containing ashless additives or for oils containing certain phosphorous compounds which may now be in use in aviation lubricants. For oils containing additives an alternate method, ASTM D 874, is suggested. However, ASTM D 874 includes additional restrictions and reservattions which question the suitability of that method as an acceptable alternate or replacement for ASTM D 482 for low ash containing lubricating oils.