Titanium

Titanium is an element (Atomic No 22)

Commercially pure
- Grade 2, grade 3
Commonly alloyed with:
- Aluminium (Al) 5%
- Vanadium (V) 4%
- Grade 5 for high strength
Cast grades
ASTM B367
- C2,C3 equivalent to UNS R50400,R50550 & R52550
- C5 equivalent to UNS R56400, R56401

Typical Properties

	C2	C3	C5
Tensile	275	450	895 min N/mm2
Yield	345	380	825 min N/mm2
Elongation	15%	12%	6%
Hardness	230	320HB	typ
Density	4.4 g/cm3
P/T: C2	SPT02	14.2	bar class 150
P/T: C3/C5	SPT04	18.4	bar class 150

Corrosion Properties

Excellent in nearly all cases
Poor fouling performance but immune to Microbiological Corrosion

Additional Uses & Comments

High strength, low density
Has been used where a 50 year life was required (Shell Troll- ballast system)
Casting is a specialist process
Very good for Acids (Nitric, Hydrochloric) and wet Chlorine too
Can be cost effective, particularly if designed to take account of high strength

Cautions

Casting is a specialist process
Welding- air must be excluded, otherwise hardening occurs.
Not resistant to Hydrofluoric Acid
Don’t use Methanol to clean- causes cracking
Designs must take account of low modulus of elasticity (100 – 110 N/mm2)
Galling and wear properties not good