Dear All,
First of all 316 is not substitute for 13CR (410).316 will not with stand the wear resistance.So that please instruct the vendor to supply 13cr only.Temporary basis you can use 316 but immediately you have to replace at next available ooertunity.
Thanks and best regards
Satya
On Sat, 01 Mar 2008 Jayesh Dave wrote :
>The basic difference is that 316 is austenitic SS v/s 13Cr gives a martensitic stainless steel - for valve seat applications, hardness is the main requirement hence the substitution with any other type of martensitic type SS will be accepted.
>
>regards,
>Jayesh
>
>
>Date: Mon, 25 Feb 2008 02:15:53 -0800From: kiqbal9@yahoo.comSubject: [MW:604] Re: 13% Cr steel valve trimsTo: materials-welding@googlegroups.com; piping_valves@yahoogroups.com
>Dear Ravi,
>
>If a steel contains 13% Cr. it means it is stainless Steel.
>The material specifications provided by your vendor are adequate. You may even use SS304 grade.
>
>Regards, ravi kiran yeleswarapu <kiranry@rediffmail.com> wrote:
>
>Gents,Please share your views on following:"As per specs valve trims are required to be of 13% Cr steel" no further details given w.r.t. material specs nor clarified with client then.However vendor has supplied A276-316 for stem and A351 CF8M for disc.Are above acceptable as per spec of 13% cr steel.As per client's interpretation of 13% Cr steel means AISI 410 or equivalent but not 316. Best regards, Ravikiran
>
>
>
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