几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 - 查看单个帖子

astm a370 clarification
any feedback would be appreciated:
i will be having 6" cold-formed steel studs that will need to undergo tension testing in accordance with astm a370.
how can i determine how many studs to test, i.e.) is there a generally accepted percentage to determine a reasonable conclusion?
also, does astm provide allowable deviations from a specified strength? i.e.) if the studs are specified to obtain a 50 ksi yield strength, any specimen not reaching 50.0 exactly fails the whole lot?
i do not see these addressed in astm a370...again any feedback would be appreciated.

look in the front part of a370 at the reference standards. there is likely one that references sampling and testing in general for such products. that should give the lot size, percentage, and tolerances.

2009-09-07, 01:41 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	astm a370 clarification astm a370 clarification any feedback would be appreciated: i will be having 6" cold-formed steel studs that will need to undergo tension testing in accordance with astm a370. how can i determine how many studs to test, i.e.) is there a generally accepted percentage to determine a reasonable conclusion? also, does astm provide allowable deviations from a specified strength? i.e.) if the studs are specified to obtain a 50 ksi yield strength, any specimen not reaching 50.0 exactly fails the whole lot? i do not see these addressed in astm a370...again any feedback would be appreciated. look in the front part of a370 at the reference standards. there is likely one that references sampling and testing in general for such products. that should give the lot size, percentage, and tolerances. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]