Simple question...

Is this Fixe bolt made of 316- or 304-steel? Placed in 2004.

I do not know what type of steel it is made of, but it is a steel glue-in. I notice that you are from Taipei, so a marine environment. Your photo clearly shows stress corrosion, which is the result of this type of environment. Steel of any sorts should not be used in these situations, and should be replaced with titanium.

304 Stainless Steel

304.
Looks like a typical weld-sensitised corrosion problem, it happens with all grades of stainless (and titanium to a lesser extent) depending on the skill of the welder and the post-treatment.
There´s a reason I recommend NOT using welded bolts near the sea:-)

Thank you guys. I am very well aware of the problem and am in direct communication with Martin Roberts of Titan Climbing, Josh Lyons of the Thaitanium Project, John Brynes in Cayman Brac, Mike Richardson in Hawaii, David Acott in Singapore, Francis Haden in Hong Kong... so yeah.

Oh yeah and Alan Jarvis of the UIAA. Although he doesn't answer emails.

Thanks for keeping LD Tiawan in order Nate!!
Love that place, people, food, culture...
(The first day I met Nate at the crag, he was up spending the day replacing anchors.. Thanks!)

Jim, who posted here is a great source of knowledge for these things.

Cor

PS: If we are lucky, we might make it back next October for another conference...