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US Suppliers for Code Case 2328 stainless tubing

US Suppliers for Code Case 2328 stainless tubing

US Suppliers for Code Case 2328 stainless tubing

(OP)
Please provide suppliers in the US or Europe of stainless steel tubing to ASME Code Case 2328-1. Code Case 2328 has chemistry as follows:
C: .07-.13
Mn: 1.00 max
Ni: 7.50 - 10.50
Cr: 17.00 - 19.00
Cu: 2.50 - 3.50
Nb: .30 - .60
N: .05 - .12
Al .003 - .030
B: .001-.010

RE: US Suppliers for Code Case 2328 stainless tubing

I went back in my ASME C&S connect to obtain the history on this code case. Apparently, Sumitomo developed a super 304H material and presented to ASME B&PV Materials Group in 1998. This code case was brought to ASME by representatives from Sumitomo.

Excerpt from the history file....

[The proposed Code Case is for a new austenitic stainless steel developed by Sumitomo Metals. Sumitomo refers to this new alloy as Super 304H. The steel is approximately 20% stronger than TP347H and reportedly exhibits superior oxidation/corrosion resistance equivalent to TP347HFG. Documentation submitted with the request for a Code Case showed that 14 jobs with a production total of more than 3000 tons have been fabricated by Japanese boilermakers between January 1989 and October 1998.

Sections I, II, IX, and the SG-SW (SC II) have all reviewed the material and concur with its use in a Code Case.]


RE: US Suppliers for Code Case 2328 stainless tubing

Also, forgot to mention that the SUPER304H tube material submitted for the Code Case is UNS 30432 and will be listed in ASME SA 213.

RE: US Suppliers for Code Case 2328 stainless tubing

(OP)
Thanks to all. It is as I feared/knew. The steel is only available in Japan. The Super304H is specified for boiler superheater tubing by IHI.  I had hoped to find suppliers other than in Japan, due to the difficulty in purchasing small quantities of the material there. We will simply have to push IHI to provide spare material and the quantities required for qualification of procedures and welders per the Code Case.    

metengr:
Do you know if the material will be listed under SA 213 in the next Addendum?

RE: US Suppliers for Code Case 2328 stainless tubing

stanweld;
That is the plan, according to my ASME B&PV Code reference material.

RE: US Suppliers for Code Case 2328 stainless tubing

Just ask if anyone knows anything about mechanical characteristichs and weldability of SUPER 304 H, or at least where I can find anything about that! It seems "mission impossible"...Thanks, Daniele Calcagno

RE: US Suppliers for Code Case 2328 stainless tubing

Visit the post by unclesyd in this thread. This material was brought forward to ASME B&PV Code by Sumitomo. Contact them for technical information.

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