wqz198 发表于 2009-4-19 16:44:43

About induction hardened surface layer grain size

"If nothing else is indicated, the grain size in the induction hardened surface layer be ISO index G=7 or finer which corresponds to an average grain size of max 30μm. "
What's mean "ISO index G=7"?
I guess it is"Grade 7" , but Idon't know which ISO standard? And which chinese standard corresponds to it?
Please help me! thank you very much!

陆丰 发表于 2009-4-19 19:35:25

I think that ISO refers to International Standardization Organization.
" index"should be interpreted as "provision".

maxdew 发表于 2009-4-23 11:15:25

you can search the iso spec on the web site.
but I think you just need know the "corresponds to an average grain size of max 30μm"
:lol

maxdew 发表于 2009-4-23 11:17:15

http://www.iso.org

greatmanzhang 发表于 2009-4-23 17:26:05

In the first page in the some GB/T standards, you can see GB****=ISO*****, that mean the info in the 2 standard is the same, pls find the the GB standard about grain size evaluation,if the you can seeGB****=ISO*****, word ,that mean the same info with ISO, then it can be referenced.

jysh81 发表于 2009-4-24 14:06:31

the standard GB is GB/T6394-2002

lanwenbiao 发表于 2009-5-26 16:27:45

原帖由 jysh81 于 2009-4-24 14:06 发表 http://www.rclbbs.com/images/common/back.gif
the standard GB is GB/T6394-2002
GB and ISO are very identical in terms of grain size.

jumnshen 发表于 2010-1-12 10:47:46

You can also refer ASTM E112.

zbw99012333 发表于 2010-4-23 11:42:32

Many GB standards copy or refer to other countrys`, such as Japanese and American. Nowdays, in order to make all standards follow in all countrys of the world. Those people who called "ISO" make the ISO standards.

Diego001 发表于 2010-5-8 15:13:35

Grade 7 in GB/T6394-2002,And the size is 28.24um,so it is equal to theiso standard you provide !
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