I have a question regarding duplex steel 2205
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The grade corresponding to duplex steel 2205 is generally UNS31803, but this seems to be the grade for pipes/welded components; what is the corresponding grade for castings? Is it 1B (CD4MCUN, J93372) or 4A (CD3MN, J92205)? Or some other grade? Please help clarify this, thank you all!
It should be the latter one, 4A (CD3MN, J92205)
A182 F51 is a grade for duplex stainless steel forgings; the corresponding grades for pipes and sheets are S31803
This type of steel possesses the characteristics of both austenitic and ferritic stainless steels. Compared to ferritic steels, it has higher plasticity and toughness, no room-temperature brittleness, and significantly improved resistance to intergranular corrosion as well as weldability. At the same time, it retains the 475°C brittleness and high thermal conductivity associated with ferritic stainless steels, as well as superplasticity. Compared to austenitic stainless steels, it has higher strength, as well as significantly improved resistance to intergranular corrosion and chloride stress corrosion. Duplex stainless steel possesses excellent pitting resistance and is also a nickel-saving stainless steel. It is mainly used in the production of acidic oil and gas wells. In most cases, it replaces 304L and 316L.
The cast impellers, pump casings, etc. have the grade CD4MCu
Thank you for the answer; the corresponding casting should be CD4:D
Dual-phase steel 2205 is generally available in sheet form
But the equivalent of CD4 should be F51; 2205 is F60, and in A182 it is S32205. The compositions of these materials are different. CD4。 . The composition of castings differs significantly from that of 2205 forgings; can they be used as substitutes?
CD4MCU and 2205 are two different materials; which one is better? Don’t confuse things.