MDMT for SA-516
MDMT for SA-516
(OP)
Can SA-516 be used for a heat exchanger with a Min. temperature of -80° F? What would be the ideal material/grade to use in this application?
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RE: MDMT for SA-516
(2) My initial thought would be that austenitic stainless steel might be a better fit if it is an exchanger, depending on other things like chlorides...
RE: MDMT for SA-516
RE: MDMT for SA-516
RE: MDMT for SA-516
Please take a look at ASME Sec-II,Pt-A, SA-20, Table A 1.15. As per this table under Class-IV materials, (with an acceptable impact values of 15Ft-Lbs Average & 12Ft-Lbs Minm):-
-SA-516/70,the recommended impact test temp, up to 1 inch thk:- -50 Deg F
-SA-203Gr B,the recommended impact test temp, up to 1 inch thk:- -90 Deg F(2.5% Nickel)
-SA-203Gr E,the recommended impact test temp, up to 1 inch thk:- -150 Deg F(3.5% Nickel)
For the design temp specified above SA 203Gr B should be a good fit.
Should there be any sour/wet H2S service requirements be applicable(refinning or petrochemicals),the requirements of NACE MR -0103 should be met.If the intended service is for upstream oil and gas production(where MR0175 requirements are commonly applicable) 2.5% & 3.5% Nickel steels are not acceptable as per the current acceptance standards.
Thanks
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist
Ontario, Canada.
ca.linkedin.com/pub/pradip-goswami/5/985/299