AWS B863 TA7 Ti-5Al-2.5Sn Corrosion resistant titanium wire price
per kg
Introduction to TA7 / Ti-5Al-2.5Sn titanium alloy
TA7 titanium alloy is a medium-strength α-type single-phase
titanium alloy containing 5% α stable element aluminum and 2.5%
neutral element tin. The alloy cannot be strengthened by heat
treatment.
chemical composition
Grade | Main ingredient ％ | Impurity content ％,≤ |
| AL | Sn | Ti | Fe | C | N | H | O | other |
| one | total |
| TA7 | 4.0~6.0 | 2.0~3.0 | Bal | 0.50 | 0.08 | 0.05 | 0.015 | 0.20 | 0.10 | 0.40 |
| TA7EL1 | 4.5~5.75 | 2.0~3.0 | Bal | 0.50 | 0.05 | 0.035 | 0.0125 | 0.12 | 0.05 | 0.30 |
Mechanical properties
Density 4.42g / cubic centimeter, room temperature elastic modulus
113GPa, Poisson's ratio 0.33, hardness 277 ~ 286HB, melting point
172 Silicon titanium alloy wear-resistant floor 5 ℃, thermal
conductivity λ = 15.24W / (mK), tensile strength σb = 539MPa,
elongation δ = 25%, section shrinkage ψ = 25%, elastic modulus E =
1.078 × 105MPa
Product Features
It is characterized by good thermal strength and good welding
performance. Its process plasticity is low, and the sheet forming
should be carried out in a heated state.
Titanium alloy classification
Titanium is an allotrope with a melting point of 1668 ° C. When it
is lower than 882 ° C, it has a close-packed hexagonal lattice
structure called alpha titanium; above 882 ° C it has a
body-centered cubic lattice structure called beta titanium. Using
the different characteristics of the above two structures of
titanium, appropriate alloying elements are added to gradually
change the phase transition temperature and phase content to obtain
titanium alloys with different structures. At room temperature,
titanium alloys have three matrix structures, and titanium alloys
are divided into the following three categories: α alloys, (α + β)
alloys, and β alloys. China is represented by TA, TC and TB
respectively.
alpha titanium alloy
It is a single-phase alloy composed of α-phase solid solution.
Whether it is at ordinary temperature or at a higher actual
application temperature, it is α-phase, with stable structure,
higher wear resistance than pure titanium, and strong oxidation
resistance. At a temperature of 500 ℃ ~ 600 ℃, it still maintains
its strength and creep resistance, but can not be strengthened by
heat treatment, the strength at room temperature is not high.
Beta titanium alloy
It is a single-phase alloy composed of β-phase solid solution. It
has high strength without heat treatment. The alloy is further
strengthened after quenching and aging. The room temperature
strength can reach 1372 to 1666 MPa; but the thermal stability is
poor and it is not suitable for use at high temperatures. .
α + β titanium alloy
It is a two-phase alloy with good comprehensive properties, good
organizational stability, good toughness, plasticity and
high-temperature deformation properties, good hot-press processing,
quenching and aging to strengthen the alloy. The strength after
heat treatment is about 50% to 100% higher than that of the
annealed state; the high temperature strength is high, it can work
for a long time at a temperature of 400 ℃ to 500 ℃, and its thermal
stability is inferior to the alpha titanium alloy.
Among the three titanium alloys, the most commonly used are α
titanium alloy and α + β titanium alloy; α titanium alloy has the
best machinability, followed by α + β titanium alloy, and β
titanium alloy is the worst. The code name for α titanium alloy is
TA, the code name for β titanium alloy is TB, and the code name for
α + β titanium alloy is TC.
Production Process of titanium wire:
Titanium sponge→compacting electrodes→melting→forging→bar
billets→hot rolling→cold draw→titanium wires
Surface quality: high precision, good finish, no oxidation color, no cracks,
peeling, thorns, marks and inclusions. Minor
local scratches, abrasions, spots and pits that do not exceed the
allowable deviation of the wire diameter are allowed.
Detailed pictures:
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