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Help, i'm trying to find the basic composition of an aluminium alloy that we have specified, it is described as HE30TF Ali bar, does anyone know where i can get this info from? In anticipation! F

Hi all, thanks for the info, now looking at various alternatives Cheers! F Green

anegri, we use an EDWARDS Spectron 5000S leak detector (nitrogen filled) this allows us to test with relative ease to leak rates of 1 x 10 -9 mbarl/s. Products each tested individually by holding at vacuum and then applying Helium to external area of product. That pretty much covers the main...

This may be asking for the impossible but i thought i'd ask anyway! I'm looking for a supplier of a small needle valve as current supplier is making product range currently supplied obsolete. Main issues encountered so far are finding valve of the same dimensions as the valve is used in a system...

Hi there, not sure if this will have any relevance to the original question but the general "standard" leak rate for vacuum valves is 1x 10 -9 mbarl/s. This is for for use with vacuum valves in a vac system, although it sounds like you're looking for leak rate "limits" for...

Hi, This may or may not be of use to you, but i had a vaguely similar problem with weld quality on St/St after many hours of "problem free" (yes it does exist!) Nd-YAG welding. Although the monitoring system of our laser was supposed to highlight/counteract any degredation of the...

Hi, Has anybody tried laser welding of Titanium and Stainless Steel using Nd@YAG laser(2.5kw)? Thickness of two metals = approx 1.0mm, circumferential seam weld. Would appreciate any advice on whether this is possible and if so any useful info from experiences! Fraser

Thanks LaserExp, yes,unfortunately the orientation of the job provides an overhang above the weld area which is the predominant area where the black residue is deposited. Efforts will continue to erradicate residue! Cheers FGreen

I'm predominantly welding two types of Stainless Steel. Stainless AISI316L welded to same material and also AISI316L welded to AISI304 Cheers

I currently use a Nd:YAG for welding ST/ST components. I experience a deposit of a black powder like substance on the components afer welding. This can vary depending on the direction the shield gas (ARGON-Pure)is applied in but is ever present to some degree. Has anyone had similiar experiences...