Titanium and titanium alloy grade naming rules
The naming rules of titanium and titanium alloy grades are important concepts in the field of titanium and titanium alloys. In industrial production, titanium alloys usually start with "Ti-", followed by a combination of numbers and letters, representing the content and properties of different elements. Among them, "Ti" represents the titanium element itself, the number after "-" represents the percentage of the main alloying element, and the letter after "-" represents the secondary element. For example, in Ti-6Al-4V, "6" represents an aluminum content of about 6%, and "4" represents a vanadium content of about 4%. This article will give you a detailed introduction to the naming rules of titanium and titanium alloy grades in China.
1. Basic rules for naming titanium and titanium alloy grades
1.1 Classification of titanium and titanium alloy grades
1.1.1 Titanium and titanium alloy grades are divided into three categories, namely α, α-β and β
1.1.2 Titanium and titanium alloy grades are classified according to the results of molybdenum equivalent calculated from their nominal component content.
1.2 Rules for naming titanium and titanium alloy grades
1.2.1 The naming of titanium and titanium alloy grades adopts a registration system. Grade registration should be carried out before the grade is named, and the naming is unified.
1.2.2 Letters and numbers are used to represent the grades of titanium and titanium alloys.
2. Methods for compiling titanium and titanium alloy grades
2.1 The first digit of the grade is represented by the capital letter "T" to represent titanium and titanium alloys.
2.2 The second digit of the grade represents the type of alloy, which is represented by capital letters A, B and C respectively. A represents industrial pure titanium, α-type and near-α-type alloys, B represents β-type and near-β-type alloys, and C represents α-β-type alloys.
2.3 The Arabic numerals in the grade are sorted in the natural order of registration.
2.4 The same grade of ultra-low interstitial alloys is followed by the capital letters "ELI", and there is no interval between the number and "ELI".
3. Rules for compiling nominal composition
3.1 The nominal composition of titanium alloy grades only lists the elements that must be controlled.
3.2 The determination of the element content in the nominal composition should be based on the arithmetic mean of its control range.
4. Commonly used titanium alloy grades TA0~TA36: TA0~TA4 (industrial pure titanium), TA1G (Grade 1), TA2G (Grade 2), TA3G (Grade 3), TA4G (Grade 4), TA5 (Ti-4Al-0.005B), TA6 (Ti-5Al), TA7 (Ti-5Al-2.5Sn), TA15 (Ti-6 .5Al-1Mo-1V-2Zr), TA17(Ti-4Al-2V), TA18(Ti-3Al-2.5V), TA19(Ti-6Al-2Sn-4Zr-2Mo-0.08Si) TB2~TB17: TB2(Ti-5Mn-5V-8Cr-3Al), TB6(Ti-10V-2Fe-3Al), TB7(Ti-3 2Mo), TB14(Ti-45Nb), TB16(Ti-3Al-5V-6Cr-5Mo) TC1~TC32: TC1(Ti-2Al-1.5Mn), TC2(Ti-4Al-1.5Mn), TC3(Ti-5Al-4V), TC4(Ti-6Al-4V), TC6(Ti-6Al-1.5Cr-2.5Mo-0.5Fe-0 .3Si), TC11(Ti-6.5Al-3.5Mo-1.5Zr-0.3Si), TC17(Ti-5Al-2Sn-2Zr-4Mo-4Cr), TC19(Ti-6Al-2Sn-4Zr-6Mo), TC21(Ti-6Al-2Mo-2Nb-2Zr-2Sn-1.5Cr), TC25 (Ti-6.5Al-2Mo-1Zr-1Sn-1W-0.2Si)
5. Uses of titanium alloys
The density of titanium alloys is generally around 4.51 g/cm3, which is only 60% of that of steel. The specific strength (strength/density) of titanium alloys is much greater than that of other metal structural materials, and can be used to produce parts and components with high unit strength, good rigidity and light weight. Currently, aircraft engine components, skeletons, skins, fasteners and landing gear all use titanium alloys.
In short, although the naming rules of titanium and titanium alloy grades seem obscure, they are actually designed to facilitate people to understand and apply titanium alloy materials. The naming rules of titanium alloy grades are designed to express the alloy composition concisely and clearly, helping people quickly understand the characteristics and uses of the alloy. In practical applications, different grades of titanium alloys have different mechanical properties, corrosion resistance and processing characteristics, so choosing the right grade is crucial for various industries. If you want to learn more about titanium alloys, please follow us~
