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[MW:34351] Re: IGC Testing requirement in SS410S.

By Materials & Welding
Dear Ronak 

The  410S  material is basically a Martensitic Stainless steel .The  microstructures is  not prone to Sensitization .
ASTM E 262 - Austenitic
ASTM E763 - Ferritic grade 

So it is not covered under either E 262 OR 763.
410S has lower Carbon so the hardness is moderate 
As per my opinion , the MOC is being selected in view of primarily because of elevated temperature Service and not for corrosive media ( the corrosion medium could be a mild corrosive media ). Also it has more erosion resistance at elevated Temperature . 
Pl. discuss with your Process Specialist and discuss about Service Environment .  Corrosion testing is not required . 

The Erosion resistance at certain operating temperature is a primary objective .

Thanks and regards

Vishwas -IWE
International Welding Engineer 




On Tuesday, June 20, 2023 at 8:47:43 AM UTC+5:30 Ronak Patel wrote:
Dear Experts ,

We are using SS410S CLAD in Coke Drum at 450 degree temp.

Is IGC test required for SS410S material ? at present there is no requirement of IGC testing for SS410S in coke drum cladding in industry .

 As per my understanding, IGC happens in ferritic SS as well if they are exposed to high temp(450 in my case) in operation , welding or PWHT. So why SS410S is not tested for IGC as per A763 ?

How IGC is different in ferritic SS than in Austenitic SS ?

Thanks and Regards,
Ronak Patel.

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