Gen3 Titanium bolts and nuts addiction

Been reading about it and it turns out Metallurgy is complex. Any given application has a bunch of pros and cons and cost. I had no idea both stainless and titanium were like aluminum with a passive oxide film layer.
Titanium is a very reactive metal that shows remarkable corrosion resistance in oxidizing acid environments by virtue of a passive oxide film. Following its commercial introduction in the 1950's, titanium has become an established corrosion resistant material. In the chemical industry, the grade most used is commercial-purity titanium. Like stainless steels, it is dependent upon an oxide film for its corrosion resistance. Therefore, it performs best in oxidizing media such as hot nitric acid. The oxide film formed on titanium is more protective than that on stainless steel, and it often performs well in media that cause pitting and crevice corrosion in the latter (e.g., seawater, wet chlorine, organic chlorides). While titanium is resistant to these media, it is not immune and can be susceptible to pitting and crevice attack at elevated temperatures. It is, for example, not immune to seawater corrosion if the temperature is greater than about 110oC.
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Titanium corrosion
 
dcnblues said:
Been reading about it and it turns out Metallurgy is complex. Any given application has a bunch of pros and cons and cost. I had no idea both stainless and titanium were like aluminum with a passive oxide film layer.

Titanium corrosion
Click to expand...

I wonder if commercial grade purity is just general Grade 2 Ti? It is not as pretty as Grade 5, more bronze than silver if looking at side by side. But grade 2 is considerably less tensile strength than Grade 5, I don't recall but it was lower than grade 5 steel hardware of equal size.
 
Chinese titanium gas cap bolts, the black stainless I've had for the past year are fading. I also tested button head for kicks, but the sockethead match the fairing bolts.

3.3g to 1.8g, 6g savings for $10 total.
Buttonhead were 1.4g cost $3 total.

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PXL_20230824_005004279.jpg
 
Robert 0046 said:
Where did you get them?
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AliExpress, can send a link if interested.

Z is correct, tons of Ti products for alot less than in the states. You HAVE to read to make sure of grade, but generally speaking the bright shiny Ti is Grade 5 and the more bronze looking is grade 2. I've had an handful of Chinese Ti hardware I purchased tested and it is legit stuff and wouldn't hesitate to run it on load bearing items. :)
 
InfiniteReality said:
I wonder if commercial grade purity is just general Grade 2 Ti? It is not as pretty as Grade 5, more bronze than silver if looking at side by side. But grade 2 is considerably less tensile strength than Grade 5, I don't recall but it was lower than grade 5 steel hardware of equal size.
Click to expand...
Grade 5 ti is considered equal to 8.8 steel . Stainless steel is also 8.8 . 12.9 hardened steel applications can still be replaced in some instance with grade 5 ti , but discretion is advised . Grade 2 ti is far from grade 5 quality , and is currently flooding ( chinese seller ) ebay ti bolt listings ,basically because of less quality manufacture ingredients available for china to manufacture grade 5 . This is to do with trade war going on between china and Australia .
 
ROADTOAD1340 said:
Grade 5 ti is considered equal to 8.8 steel . Stainless steel is also 8.8 . 12.9 hardened steel applications can still be replaced in some instance with grade 5 ti , but discretion is advised . Grade 2 ti is far from grade 5 quality , and is currently flooding ( chinese seller ) ebay ti bolt listings ,basically because of less quality manufacture ingredients available for china to manufacture grade 5 . This is to do with trade war going on between china and Australia .
Click to expand...

I believe most stainless vs steel, stainless is typically decent bit weaker. I wanted to swap all bolts to stainless on something at one point, but chose not to on structural components to be safe.

I believe grade 2 is even softer than aluminum. I've had a handful of chinese stuff tested, so far all has checked out per listing (aliexpress).
 
InfiniteReality said:
I believe most stainless vs steel, stainless is typically decent bit weaker. I wanted to swap all bolts to stainless on something at one point, but chose not to on structural components to be safe.

I believe grade 2 is even softer than aluminum. I've had a handful of chinese stuff tested, so far all has checked out per listing (aliexpress).
Click to expand...

Stainless steel would be considered more 'brittle' for lack of a better term, vs steel of the same rating.
You also don't want to have to remove broken ss fasteners, as they can be a little more difficult, and it will eat up a drill bit if you aren't careful.
Then, titanium...lol...have you ever tried to remove a broken tap?
I'de imagine titanium to be as fun, lol
Get the grade5 from a quality supplier, it's your best chance of not finding out.
 
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