Product Code:SAE J431
Title:Automotive Gray Iron Castings
Issuing Committee:Automotive Iron And Steel Castings Committee
Scope:This SAE Standard covers the hardness, tensile strength, and microstructure and special requirements of gray iron sand molded castings used in the automotive and allied industries. Specific requirements are provided for hardness of castings. Test bar tensile strength/Brinell hardness (t/h) ratio requirements are provided to establish a consistent tensile strength-hardness relationship for each grade to facilitate prediction and control of tensile strength in castings. Provision is made for specification of special additional requirements of gray iron automotive castings where needed for particular applications and service conditions.Note: This document was revised in 1993 to provide grade specific t/h control. In 1999 the document was revised to make SI metric units primary. To better align the grading system with long established production methods and grades produced, the previous system of grading by fixed combinations of tensile strength and hardness was changed in 1999 to a system of grading by variable combinations of test bar t/h ratio and casting hardness grades. The number of hardness grades was increased relative to the number of previously available ranges to facilitate centering of casting mean hardness in the specification range so that dependence of cost optimization on controlling near the low or high sides of specification ranges is minimized.【英文标准名称】:Equipmentreliabilitytesting-Part6:Testsforthevalidityandestimationoftheconstantfailurerateandconstantfailureintensity(IEC60605-6:2007)
【原文标准名称】:设备可靠性测试.第6部分:对恒定故障率或恒定故障程度的正确性和评估试验
【标准号】:DINIEC60605-6-2007
【标准状态】:现行
【国别】:德国
【发布日期】:2007-11
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分析;数据;缺陷;电器;电气工程;电驱动装置;设备;评估;故障;故障率;图解法;指南;假设;寿命周期;可维护性;维修;数值法;概率计算;可靠度;可靠性测试;表示法;样本大小;规范(验收);统计分析方法;统计测试;统计学;故障统计;测试;有效性;验证
【英文主题词】:Analysis;Data;Defects;Electricappliances;Electricalengineering;Electrically-operateddevices;Equipment;Evaluations;Failure;Failurerates;Graphicalmethods;Guidebooks;Hypothesis;Lifecycles;Maintainability;Maintenance;Numericalmethods;Probabilitycalculations;Reliability;Reliabilitytesting;Representations;Samplesize;Specification(approval);Statisticalmethodsofanalysis;Statisticaltesting;Statistics;Statisticsoffailure;Testing;Validity;Verification
【摘要】:
【中国标准分类号】:K04
【国际标准分类号】:03_120_10;29_020
【页数】:38P.;A4
【正文语种】:德语