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Re: [MW:5779] Fastener Material Regarding

By Materials & Welding
Dear Mr.Vijay,
 
As per ASTM A 320 sec 9 it is clearly mentioned that nuts to be of ASTM A 194 Grade 4 or Grade 7. Please refer the below.

9. Nuts and Washers

9.1 Bolts, studs, and stud bolts of Grades L7, L7A, L7B,

L7C, L43, L1, L70, L71, L72, and L73 shall be equipped with

ferritic alloy nuts conforming to Grade 4 or Grade 7 of

Specification A 194/A 194M or a grade of steel similar to the

studs. Grade 7M nuts at a hardness not exceeding 235 HB (or


regards,
On Tue, Jun 29, 2010 at 10:14 AM, Vijay <k.vijayaraj@gmail.com> wrote:
Dear All,

For one of our project the fastener requirement was LTCS material as
per project Specification.

The Bolts we received were ASTM A320 Gr. L7 but Nuts we received were
ASTM A194 Gr. 2H

Whether is it is acceptable ????

Kindly clarify.

Regards,
Vijay.

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G.Murali krishnan
Saudi Arabia


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