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Titanium alloy tube performance

Titanium alloy tube performance: Titanium alloy tube is a new type of metal. The performance of titanium is related to the content of impurities such as carbon, nitrogen, hydrogen and oxygen. The purest titanium iodide impurity content does not exceed 0.1%, but its strength is low. High plasticity. The performance of 99.5% industrial pure titanium is: density ρ=4.5g/cm3, melting point is 1725°C, thermal conductivity λ=15.24W/(mK), tensile strength σb=539MPa, elongation δ=25%, section Shrinkage ψ=25%, elastic modulus E=1.078×105MPa, hardness HB195.

Classification of titanium alloy tubes

The titanium alloy tube is a tube made of a titanium alloy, and the titanium alloy can be classified into three types according to the structure.
1. Add aluminum and tin to titanium.
2. Titanium is added with alloying elements such as aluminum chromium molybdenum vanadium.
3. Add elements such as aluminum and vanadium to titanium.

They have high mechanical properties, excellent stamping properties, and can be welded in various forms. The strength of the welded joint can reach 90% of the strength of the base metal, and the cutting performance is good. Titanium tubes have high corrosion resistance to chlorides, sulfides and ammonia. The corrosion resistance of titanium in seawater is higher than that of aluminum alloy, stainless steel and nickel-based alloy. Titanium is also resistant to water shock.

About the application of titanium tube

Titanium has plasticity. The high-purity titanium has an elongation of 50 to 60% and a reduction in area of ​​70 to 80%. Despite the low strength of high-purity titanium, pure industrial titanium contains a small amount of impurities and the addition of alloying elements can significantly enhance its mechanical properties, making its strength comparable to high strength. This means that industrial pure titanium tubes, as long as they contain a small amount of interstitial impurities and other metal impurities, can have both high strength and proper plasticity. The specific strength (strength to weight ratio) of industrial pure titanium tubes is very high in metal structural materials, and its strength is comparable to steel, but its weight is only 57% of steel. In addition, the titanium tube is highly heat resistant and maintains good strength and stability in an atmosphere of 500 °C. The titanium tube also has good low temperature resistance, and even at an ultra-low temperature of -250 ° C, it has high impact strength and can withstand high pressure and vibration. Another remarkable feature of the industrial pure titanium tube is its high corrosion resistance. This is because it has a particularly high affinity for oxygen and can form a dense oxide film on the surface to protect the titanium from the medium. Therefore, titanium has excellent stability in acidic, basic, neutral salt aqueous solutions and oxidizing media, and is superior in corrosion resistance to existing stainless steels and other non-ferrous metals. Industrial pure titanium tubes are widely used. At present, industrial pure titanium tubes are not only used in aerospace and aviation industries, but also widely used in many industrial sectors such as chemical, petroleum, light industry and power generation. Because pure industrial titanium tube has many excellent characteristics such as light weight, high strength, strong heat resistance and corrosion resistance, it is known as “the metal of the future” and is a new type of structural material with great development prospects.

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FAQ

Q:How to get titanium tube suitable for me?
A:Check the details and click on send us Website form or email (anber@bjhighstar.com) and tell us the specification,grade and quantity you need. We will respond to you within 2 hours and give you the best offer.

Q:What are the classification of titanium tube?
A:gr2 gr1 pure titanium seamless tube,gr5,gr7,gr9 titanium alloy tube etc,standard:ASTM B338,ASTM B861 ETC…

Q:How long isyour delivery time?
A:If it is in stock, we will ship it within 2 days. If it isnot in stock, the construction period is about 7-15 days.

Q:What is the payment method?
A:We support wire transfer, T/T, credit card payment, PayPal, Payoneer,Western Union.

Q:Is it possible to provide free samples?
A:Of course,We can send free samples for your test according to your needs, you only need to pay a small amount of shipping.

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Titanium alloy element classification

The alloying element titanium has two kinds of homomorphous crystals: below 882 ° C is a close-packed hexagonal structure α titanium, and above 882 ° C is a body-centered cubic β titanium.
According to their influence on the phase transition temperature
Alloying elements can be divided into three categories based on their effect on the phase transition temperature:
1 The element which stabilizes the α phase and raises the phase transition temperature is α stable element, such as aluminum, carbon, oxygen and nitrogen. Among them, aluminum is the main alloying element of titanium alloy, which has obvious effects on improving the normal temperature and high temperature strength of the alloy, reducing the specific gravity and increasing the elastic modulus. 2 The element which stabilizes the β phase and lowers the phase transition temperature is β stable element, and can be divided into two types: isomorphous form and eutectoid form. The former has molybdenum, niobium, vanadium, etc.; the latter has chromium, manganese, copper, iron, silicon and the like.
3 The elements that have little effect on the phase transition temperature are neutral elements, such as zirconium and tin.
Oxygen, nitrogen, carbon and hydrogen are the main impurities of titanium alloys. Oxygen and nitrogen have a large solubility in the α phase, and have a significant strengthening effect on the titanium alloy, but the plasticity is lowered. The content of oxygen and nitrogen in the titanium is usually specified to be 0.15 to 0.2% and 0.04 to 0.05% or less, respectively. Hydrogen has a low solubility in the alpha phase, and excessive hydrogen is dissolved in the titanium alloy to produce a hydride which makes the alloy brittle. Usually, the hydrogen content in the titanium alloy is controlled to be less than 0.015%. The dissolution of hydrogen in titanium is reversible and can be removed by vacuum annealing.
According to the composition of the phase
Titanium alloys can be classified into three types according to the composition of the phases: α alloy, (α + β) alloy and β alloy, and China is represented by TA, TC, and TB, respectively.
1 Alpha alloy contains a certain amount of elements of stable α phase, which is mainly composed of α phase in equilibrium. The α alloy has a small specific gravity, good heat resistance, good weldability and excellent corrosion resistance, and has the disadvantage of low room temperature strength, and is generally used as a heat resistant material and a corrosion resistant material. Alpha alloys are generally classified into full alpha alloys (TA7), near alpha alloys (Ti-8Al-1Mo-1V), and alpha alloys (Ti-2.5Cu) with small amounts of compounds. The 2 (α + β) alloy contains a certain amount of elements which stabilize the α phase and the β phase, and the structure of the alloy in the equilibrium state is the α phase and the β phase. The (α+β) alloy has medium strength and heat treatment strengthening, but the welding performance is poor. (α + β) alloys are widely used, and the production of Ti-6Al-4V alloy accounts for more than half of all titanium materials.
3 The β alloy contains a large amount of elements which stabilize the β phase, and the high temperature β phase can be retained to room temperature. The beta alloy is generally classified into heat treatable beta alloys (stabilized beta alloys and near metastable beta alloys) and thermally stable beta alloys. Heat treatable The β alloy has excellent plasticity in the quenched state and can achieve a tensile strength of 130 to 140 kgf/mm2 by aging treatment. Beta alloys are commonly used as high strength and high toughness materials. The disadvantages are that the ratio is high, the cost is high, the welding performance is poor, and the cutting process is difficult.

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