Material of titanium tube and titanium loop flange
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I am designing a titanium device, and I would like to ask the experts: why is it necessary to use titanium alloy steel for the welding rings of titanium flanges, rather than using the same material as the pipeline, namely TA2? What are everyone using?
The internet speed is slow, so I sent it twice; I can’t delete it myself. It has been edited. The last edit to this post was made by Hunhun on 2009-2-28 at 20:35.]
Since titanium and steel cannot be welded together, the welding rings must be made of titanium. Also, please note that titanium is a non-ferrous metal, not some type of titanium alloy steel. Titanium alloy is titanium alloy, and steel is steel. They can’t be used together carelessly; using them together gives the impression of being very amateurish and unskilled. To put it bluntly…
What was said upstairs is correct; it should be titanium alloy. The question I asked seems a bit unclear, and it appears that the answer given above isn’t addressing my question either. I just want to ask whether it’s better to use titanium or a titanium alloy for the flange material; could someone who knows the answer please help me out?
Since titanium flanges have sealing surfaces, pure titanium TA2 may suffer from crevice corrosion; therefore, in applications with high requirements, the Ti-0.20Pd titanium-palladium alloy, namely TA9, is used. This material is more expensive, but it is specifically employed in areas prone to crevice corrosion, such as flange sealing surfaces and metal gaskets.
Agree with what was said above; generally, the welding rings made of titanium are of TA9 grade, commonly known as titanium palladium, and this is mainly to prevent crevice corrosion