Weld Joint Strength Reduction Factor, W for TITANIUM | ASME B31.3

[thilagaraja]

Hi everyone,

I'm new to this forum and also relatively new to the industry, where I work as a Jr.Piping Materials Engineer.

I need to calculate the pipe thickness for Titanium material, specifically ASTM B861 Grade 2, as per ASME B31.3. To do this, I need to determine the value of W, the Weld Joint Strength Reduction Factor, from Table 302.3.5 (for normal ASTM Materials). However, I’m facing difficulty because titanium is not listed in this table. Can anyone guide me on how to proceed with determining this value for titanium material?

Thank you! and

 

[BEMPE16524]

Check the Material Test Reports (MTRs), Procedure Qualification Records (PQRs), or data provided by the manufacturer for guidance on the weld strength.

 

[EdStainless]

Don't all ductile alloys have the same "W"?
You just apply this to the minimum specification strength.
Teh actual welds will be much stronger but this is all that you can take credit for.

 

[johnengkol]

in terms of calculated design, you should see note 9 on that table, there is requirement:
- for Ti<=Tcr, W = 1.0
- for Tcr<Ti<=816 DegC, W = 1 - 0.00164(Ti-Tcr)

Ti and Tcr, you can find on general notes below tables 302.3.5. so it depends on your design temperature