Martensitic Stainless Steel
Martensitic Stainless Steel
(OP)
I am trying to source martensitic stainless steel plate or forged blocks for machining/fabricating hydro-turbine runners.
I am interested in 13-4 Cr/Ni up to 150 mm thick blocks. We need about 1000 kg in this form. This grade is used for pelton runners/buckets.
Also keen to source 17-4 or 16-5 Cr/Ni grade in plate about 1" thick. Similar quantities for fabrication of francis runners.
The 17-4 or 16-5 are easier for fabrication than 13-4 as they need less preheat during welding. Does anyone know the reason for this?
Thanks
I am interested in 13-4 Cr/Ni up to 150 mm thick blocks. We need about 1000 kg in this form. This grade is used for pelton runners/buckets.
Also keen to source 17-4 or 16-5 Cr/Ni grade in plate about 1" thick. Similar quantities for fabrication of francis runners.
The 17-4 or 16-5 are easier for fabrication than 13-4 as they need less preheat during welding. Does anyone know the reason for this?
Thanks





RE: Martensitic Stainless Steel
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Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Martensitic Stainless Steel
Are ready blocks of 150mm not easily available. Rounds I have seen being commonly used for valve stems.
RE: Martensitic Stainless Steel
So far I have only been able find companies that will do a production run for us and the minimum quantities are quite large.
For interest, I have found an article "Weldability of high tensile martensitic cast steel with 13% Cr and 4% Ni" by W.Gysel that appears to answer why 13/4 is so weldable. Primarily it is by limiting the hardness of the heat effected zone, copensating for the amount of delta ferrite and preventing temper brittle ness. I dont understand all this yet though!
RE: Martensitic Stainless Steel
http
http://www.emjmetals.com/
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Martensitic Stainless Steel
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Martensitic Stainless Steel
RE: Martensitic Stainless Steel
I welded on some of the early turbines for H.O.
Best regards - Al