Titanium....

[toomzz]

Hello guys, can anyone tell me if Titanium (for example used on framelocks) is pure or an alloy? If an alloy why so? Is pure not workable, too expensive or for some other reason?

[einstein2001]

I doubt its pure titanium. I'm guessing most available metals are alloyed with at least trace amounts of other elements.

[xceptnl]

I would guess that most Ti used in framelocks is 6AL4V . See below (hyperlinked)

Ti-6Al4V is the alloy used in motorsport and in aerospace and it is used by CRP as well.
It contains 6% of Aluminium and 4% of vanadium and it is an excellent combination of resistance to loads and great resistance to corrosion.

[bpeezer]

Pure titanium would not be as strong as the proper alloy.

[IG-88]

Correct me if I got it wrong but I always heard Ti GRADE 1-4 is pure TI and Grade 5-38 are alloys

The difference is that pure Ti cannot be heat treated opposed to Grade 5 or 9. Also Grade 1-4 are easier to machine because they are not so hard. Grade 5 is a hard alloy and Grade 9 is even harder to machine. Grade 5 or 6AL4V is used for framelocks because of those carateristics (Hardness and heat treat). Grade 2 is super for scales

Grade 1 Unalloyed titanium, low oxygen.
Grade 2 Unalloyed titanium, standard oxygen.
Grade 2H Unalloyed titanium (Grade 2 with 58 ksi minimum UTS).
Grade 3 Unalloyed titanium, medium oxygen.
Grades 1-4 are unalloyed and considered commercially pure or "CP". Generally the tensile and yield strength goes up with grade number for these "pure" grades. The difference in their physical properties is primarily due to the quantity of interstitial elements. They are used for corrosion resistance applications where cost, ease of fabrication, and welding are important.
Grade 5, also known as Ti6Al4V, Ti-6Al-4V or Ti 6-4, is the most commonly used alloy. It has a chemical composition of 6% aluminium, 4% vanadium, 0.25% (maximum) iron, 0.2% (maximum) oxygen, and the remainder titanium.[5] It is significantly stronger than commercially pure titanium while having the same stiffness and thermal properties (excluding thermal conductivity, which is about 60% lower in Grade 5 Ti than in CP Ti).[6] Among its many advantages, it is heat treatable. This grade is an excellent combination of strength, corrosion resistance, weld and fabricability.
"This alpha-beta alloy is the workhorse alloy of the titanium industry. The alloy is fully heat treatable in section sizes up to 15mm and is used up to approximately 400°C (750°F). Since it is the most commonly used alloy – over 70% of all alloy grades melted are a sub-grade of Ti6Al4V, its uses span many aerospace airframe and engine component uses and also major non-aerospace applications in the marine, offshore and power generation industries in particular."[7]
"Applications: Blades, discs, rings, airframes, fasteners, components. Vessels, cases, hubs, forgings. Biomedical implants."[5]
Generally, Ti-6Al-4V is used in applications up to 400 degrees Celsius. It has a density of roughly 4420 kg/m3, Young's modulus of 110 GPa, and tensile strength of 1000 MPa.[8] By comparison, annealed type 316 stainless steel has a density of 8000 kg/m3, modulus of 193 GPa, and tensile strength of only 570 MPa.[9] And tempered 6061 aluminium alloy has 2700 kg/m3, 69 GPa, and 310 MPa, respectively.[10]
Grade 6 contains 5% aluminium and 2.5% tin. It is also known as Ti-5Al-2.5Sn. This alloy is used in airframes and jet engines due to its good weldability, stability and strength at elevated temperatures.[citation needed]
Grade 7 contains 0.12 to 0.25% palladium. This grade is similar to Grade 2. The small quantity of palladium added gives it enhanced crevice corrosion resistance at low temperatures and high pH.[11]
Grade 7H is identical to Grade 7 with enhanced corrosion resistance.[11]
Grade 9 contains 3.0% aluminium and 2.5% vanadium. This grade is a compromise between the ease of welding and manufacturing of the "pure" grades and the high strength of Grade 5. It is commonly used in aircraft tubing for hydraulics and in athletic equipment.
Grade 11 contains 0.12 to 0.25% palladium. This grade has enhanced corrosion resistance.[12]
Grade 12 contains 0.3% molybdenum and 0.8% nickel.[12]
Grades 13, 14, and 15 all contain 0.5% nickel and 0.05% ruthenium.
Grade 16 contains 0.04 to 0.08% palladium. This grade has enhanced corrosion resistance.
Grade 16H contains 0.04 to 0.08% palladium.
Grade 17 contains 0.04 to 0.08% palladium. This grade has enhanced corrosion resistance.[citation needed]
Grade 18 contains 3% aluminium, 2.5% vanadium and 0.04 to 0.08% palladium. This grade is identical to Grade 9 in terms of mechanical characteristics. The added palladium gives it increased corrosion resistance.[citation needed]
Grade 19 contains 3% aluminium, 8% vanadium, 6% chromium, 4% zirconium, and 4% molybdenum.
Grade 20 contains 3% aluminium, 8% vanadium, 6% chromium, 4% zirconium, 4% molybdenum and 0.04% to 0.08% palladium.
Grade 21 contains 15% molybdenum, 3% aluminium, 2.7% niobium, and 0.25% silicon.
Grade 23 contains 6% aluminium, 4% vanadium, 0.13% (maximum) Oxygen. Improved ductility and fracture toughness with some reduction in strength.[12]
Grade 24 contains 6% aluminium, 4% vanadium and 0.04% to 0.08% palladium.
Grade 25 contains 6% aluminium, 4% vanadium and 0.3% to 0.8% nickel and 0.04% to 0.08% palladium.
Grades 26, 26H, and 27 all contain 0.08 to 0.14% ruthenium.
Grade 28 contains 3% aluminium, 2.5% vanadium and 0.08 to 0.14% ruthenium.
Grade 29 contains 6% aluminium, 4% vanadium and 0.08 to 0.14% ruthenium.
Grades 30 and 31 contain 0.3% cobalt and 0.05% palladium.
Grade 32 contains 5% aluminium, 1% tin, 1% zirconium, 1% vanadium, and 0.8% molybdenum.
Grades 33 and 34 contain 0.4% nickel, 0.015% palladium, 0.025% ruthenium, and 0.15% chromium .[citation needed]
Grade 35 contains 4.5% aluminium, 2% molybdenum, 1.6% vanadium, 0.5% iron, and 0.3% silicon.
Grade 36 contains 45% niobium.
Grade 37 contains 1.5% aluminium.
Grade 38 contains 4% aluminium, 2.5% vanadium, and 1.5% iron. This grade was developed in the 1990s for use as an armor plating. The iron reduces the amount of Vanadium needed as a beta stabilizer. Its mechanical properties are very similar to Grade 5, but has good cold workability similar to grade 9.[13]

http://en.wikipedia.org/wiki/Titanium_alloy

[JNewell]

Sebenzas are made from 6Al4V, for what that's worth.

[IG-88]

Sebenzas are made from 6Al4V, for what that's worth.

That is Ti Grade 5. Most commun material for framelocks now a days :) Is extra hard due to the Vanadium I presume

Grade 5, also known as Ti6Al4V, Ti-6Al-4V or Ti 6-4, is the most commonly used alloy. It has a chemical composition of 6% aluminium, 4% vanadium, 0.25% (maximum) iron, 0.2% (maximum) oxygen, and the remainder titanium.[5] It is significantly stronger than commercially pure titanium while having the same stiffness and thermal properties (excluding thermal conductivity, which is about 60% lower in Grade 5 Ti than in CP Ti).[6] Among its many advantages, it is heat treatable. This grade is an excellent combination of strength, corrosion resistance, weld and fabricability.

[Ned]

interesting stuff..Thanks

[Minibear453]

I'm going to guess 6AL4V titanium. I've never heard of using anything else, but I do know pure titanium is much too soft for knives.

[zinczinc]

As my chemistry knowledge,

alloy usually stronger than pure elements, in others words, pure elements wont be as stable as alloy.

[IG-88]

Some additional info I remembered. Grade 2 will take a nice finish easier then Grade 5. So if you want to have a shinny polished Ti or a hand brushed Ti Grade 2 will be easier to work and give a better result.
Tomas is it to make scales?

[toomzz]

Thanks for the info guys; wow pick a grade, plenty of Ti-alloys.. :rolleyes:
No, I was just curious about the stuff..... :)

[sal]

Hi Toomzz,

We use 6Al4V for scales and liners. Same stuff my new hip is made from

sal

[JNewell]

Hi Toomzz,

We use 6Al4V for scales and liners. Same stuff my new hip is made from

sal

Sympathies and speedy and full recovery. BTW, probably more than we needed to know. :eek: :D

[sal]

No sympathy necessary. Hip "installed" last August. Doing well. Amazing technology and materials.

sal

[Evil D]

Hi Toomzz,

We use 6Al4V for scales and liners. Same stuff my new hip is made from

sal

Sal did you get the sprint run fluted/rainbow colored hip?

[mattman]

Sal did you get the sprint run fluted/rainbow colored hip?

What was the target RC?
What finish did you order? (I hear all the cool kids are into that fancy "stonewashed" finish...)

[xceptnl]

Sal did you get the sprint run fluted/rainbow colored hip?

LOL :p

[JNewell]

What was the target RC?
What finish did you order? (I hear all the cool kids are into that fancy "stonewashed" finish...)

I was going to ask if the contact surfaces had been carbidized... :D

[mattman]

Ready for it??














I wonder if he got a "skeletonized" version? #worstpunever