Titanium composition in 321SS
Titanium composition in 321SS
(OP)
Hi all,
What is the reason for limiting max titanium composition in the 321SS?
What is the reason for limiting max titanium composition in the 321SS?
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Titanium composition in 321SS
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Titanium composition in 321SSTitanium composition in 321SS(OP)
Hi all,
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RE: Titanium composition in 321SS
RE: Titanium composition in 321SS
This information "the titanium content shall be not less than four times the carbon content and not more than 0.7%"is written in the SA312-304
what i want to know is the reason for limiting max Titanium 0.7% content.
Thanks
RE: Titanium composition in 321SS
RE: Titanium composition in 321SS
RE: Titanium composition in 321SS
They were important back when people were trying to stabilize straight grade 304.
Today most 321 is down around 0.15% C, min Ti levels are way more than is needed.
Modern 321 is very soft.
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Plymouth Tube
RE: Titanium composition in 321SS
In 321 the Ti isn't here to impact the phase structure, it is just there to form TiC so that when you weld you will not sensitize (form CrC).
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Plymouth Tube
RE: Titanium composition in 321SS
Ed, you touched on sigma phase - Ti being a ferrite stabilizer would tend to promote this form of degradation.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: Titanium composition in 321SS
Too much Ti can give some very ugly surfaces.
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Plymouth Tube
RE: Titanium composition in 321SS
Also, Ti loves N, it is easy to form TiN particles which may not undesirable in some situations. If it is strip product, the surface can easily form heat TiN tint even under bright anneal.