Rig parts and opinions

Bntii,

The first string looks like a manufacturers stamp, or a quality control stamp. If I had to guess, and that's all this is, I would say it is a control number from RMI which is another titanium manufacturer, along with a quality control stamp.

The second string...
It looks like it is stamped grade 6 titanium, which is a mixture of 5% aluminium, and 2.5% tin. But I haven't seen that series of numbers before. Since Grade 6 is typically used in Airframes and jet engines it seems to hold water coming from a navy research lab. But I wouldn't bet on it.

The GR6 part is what's making me thing it is Grade 6, since it is typical to write grades as GR#, or Gr#, and the AL5 is correct for aluminium content, but the rest of the string I can't trace.


honestly though I am not sure of either of these guesses. Without some reference to what they might be, I wouldn't bet on my guesses being correct.

 

From the stamp info you provided my guess is that it's 6AL4V, which is pretty common Ti, and the H295477 may be the Heat# from the mill.
http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MTP641

 

Good catch Sean. I kept looking at the GR as grade, but I think you are right. If so, this would also be called Grade 5, which is the highest strength regularly used alloy.

We use it primarily on re-engineered products, where it's strength can really be taken advantage of.

For a lot of our products we generally just replace 316/316L with CP2 since they are similar in tensile and yeild strength to stainless. For instance...

The yeild strength of the alloys is as follows.
316 - 38,800psi
CP2 - 39,000psi
Gr5 - 128,000psi

See http://www.alliedtitanium.com/technical/strength/Strengths_of_Metals.pdf for more numbers and alloys.