Titanium is a chemical element with an atomic number of 22 that is classified as a transition metal on the periodic table. Titanium alloy is an alloy composed of titanium (Ti) as a base and other elements. In titanium alloys, in addition to titanium itself, other alloying elements such as aluminum (Al), vanadium (V), nickel (Ni), molybdenum (Mo), and iron (Fe) are added. The alloying elements are added to improve the performance of the titanium, such as to improve the strength, hardness and heat resistance, corrosion resistance, etc. This alloy material combines the excellent characteristics of titanium itself and the improvement effect brought by other elements, and plays an important role in many fields such as aerospace, biomedicine, chemical industry, sports and leisure.
From the perspective of microstructure, the addition of alloying elements can change the crystal structure and phase composition of titanium. Depending on the type and content of alloying elements, titanium alloys can show α phase, β phase or α + β phase structure. National standard GB/T3620.1-2007 titanium and titanium alloy grades and chemical composition of its brands by T and A, B or C (respectively alpha, beta, alpha + beta alloy) and serial number.
Industrial pure titanium is divided into TA1(UNS R50250) according to the impurity content. ASTM Grade1), TA2 (UNSR50400,ASTM Grade2), TA3 (UNSR50550,ASTM Grade3), TA4(UNSR50700,Grade4) and other grades of TA4 also have high titanium content. General titanium (Ti) content is not less than 99.5%, and other industrial pure titanium grades, the main impurity elements include iron (Fe), carbon (C), nitrogen (N), hydrogen (H), oxygen (O) and so on. However, compared with the TA1 – TA3 TA4 relatively high content of impurities.
TA1 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
N |
H |
Y |
O |
Ohter |
More |
|
Min |
— |
— |
— |
— |
— |
— |
— |
Ti |
|
Max |
0.2 |
0.08 |
0.03 |
0.015 |
0.005 |
0.18 |
0.5 |
|
Copostsion |
Fe |
C |
N |
H |
Y |
O |
Ohter |
More |
|
Min |
— |
— |
— |
— |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.08 |
0.03 |
0.015 |
0.005 |
0.25 |
0.5 |
|
Copostsion |
Fe |
C |
N |
H |
O |
Ohter |
More |
|
Min |
— |
— |
— |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.08 |
0.05 |
0.015 |
0.35 |
0.5 |
TA4 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
N |
H |
O |
Ohter |
More |
|
Min |
— |
— |
— |
— |
— |
— |
Ti |
|
Max |
0.5 |
0.08 |
0.05 |
0.015 |
0.4 |
0.5 |
TA5 is an alpha type titanium alloy. Its main alloying elements are aluminum (Al) and B. In the chemical composition of the alloy, the content of titanium (Ti) is high, and it also contains about 4%-6% aluminum (Al) and other elements, the addition of these elements helps to improve the strength and heat resistance of titanium alloy.
TA5 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
N |
B |
H |
O |
Ohter |
More |
|
Min |
— |
— |
— |
— |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.08 |
0.04 |
0.005 |
0.015 |
0.15 |
0.5 |
Common TB brand has the following kinds:
Titanium alloy TB2: Ti-5Mo-5V-8Cr-3Al alloy, titanium alloy is a kind of beta type, has high strength and good toughness, heat treatment can be strengthened, and often used in structure in the field of aerospace, fasteners, etc.
TB2 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
Cr |
Mo |
N |
V |
Al |
H |
Y |
Ohter |
More |
|
Min |
— |
— |
7.5 |
4.7 |
— |
4.7 |
2.5 |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.05 |
8.5 |
5.7 |
0.04 |
5.7 |
3.5 |
0.015 |
0.005 |
0.5 |
TB3: Ti-3Al-10Mo-8V-1Fe alloy is a heat-treatable and stable β-type titanium alloy. It has excellent cold forming performance in the solution treatment state, and the strength and fracture toughness match well in the solution aging state. It is suitable for the manufacture of aerospace fasteners, such as rivets and bolts.
TB3 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
Mo |
N |
V |
Al |
H |
Y |
O |
Ohter |
More |
|
Min |
0.8 |
— |
9.5 |
— |
7.5 |
2.7 |
— |
— |
— |
— |
Ti |
|
Max |
1.2 |
0.05 |
11 |
0.04 |
8.5 |
3.7 |
0.015 |
0.005 |
0.15 |
0.5 |
TB4: Ti-3.5Al-10Mo-8V-Fe alloy, belonging to the β type titanium alloy, with high strength, high toughness and good corrosion resistance, often used in the manufacture of aerospace, weapons and other fields of key parts.
TB4 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
Mo |
N |
V |
Zr |
Al |
H |
O |
Ohter |
More |
|
Min |
1.5 |
— |
6 |
— |
9 |
0.5 |
3 |
— |
— |
— |
Ti |
|
Max |
2.5 |
0.05 |
7.8 |
0.04 |
10.5 |
1.5 |
4.5 |
0.015 |
0.2 |
0.5 |
TB5: Ti-15V-3AL-3Cr-3Sn alloy, is a near β type titanium alloy, has good cold working performance and high strength, can be further improved by heat treatment strength, often used in the manufacture of aircraft structural parts, landing gear, etc.
TB5 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
Cr |
N |
V |
Al |
Sn |
H |
O |
Ohter |
More |
|
Min |
— |
— |
2.5 |
— |
14 |
2.5 |
2.5 |
— |
— |
— |
Ti |
|
Max |
0.25 |
0.05 |
3.5 |
0.05 |
16 |
3.5 |
3.5 |
0.015 |
0.15 |
0.4 |
TB6: Ti-10V-2Fe-3Al alloy, high strength and high toughness near β type titanium alloy, high specific strength, good fracture toughness, low forging temperature, strong stress corrosion resistance, the main semi-finished form including bars and forgings, can also be made into thick plates and profiles, especially suitable for the manufacture of isothermal die forgings and hot die forgings, in a number of civil and military aircraft have been widely used.
TB6 Chemical Element Composition and Content:
|
Copostsion |
Fe |
C |
N |
V |
Al |
H |
O |
Ohter |
More |
|
Min |
1.6 |
— |
— |
9 |
2.6 |
— |
— |
— |
Ti |
|
Max |
2.2 |
0.05 |
0.05 |
11 |
3.4 |
0.0125 |
0.13 |
0.4 |
TB8: Ti-15Mo-3Al-2.7Nb-0.2Si alloy, metastable β titanium alloy, after solid solution and aging treatment can obtain high temperature resistance, belonging to ultra-high strength titanium alloy, with good cold rolling and cold forming ability, hardenability and creep resistance. It is used to manufacture aircraft structural parts, engine structural parts and fasteners with higher temperature requirements.
TB8 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
Si |
Mo |
N |
Nb |
Al |
H |
O |
Ohter |
More |
|
Min |
— |
— |
0.15 |
14 |
— |
2.4 |
2.5 |
— |
— |
— |
Ti |
|
Max |
0.4 |
0.05 |
0.25 |
16 |
0.05 |
3.2 |
3.5 |
0.015 |
0.17 |
0.5 |
TB10: Ti-5Mo-5V-2Cr-3Al alloy, referred to as Ti-5523 alloy, is a nearly β type titanium alloy, high specific strength, high fracture toughness, good hardenability, thermal processing performance and machining performance is very excellent, can be used for aerospace structural parts and aircraft fuselage and wing structure forging parts.
|
Copostsion |
Fe |
C |
Cr |
Mo |
N |
V |
Al |
H |
O |
Ohter |
More |
|
Min |
— |
— |
1.5 |
4.5 |
— |
4.5 |
2.5 |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.05 |
2.5 |
5.5 |
0.04 |
5.5 |
3.5 |
0.015 |
0.15 |
0.5 |
TC1 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
Mn |
N |
Al |
H |
Y |
O |
Other |
More |
|
Min |
— |
— |
0.7 |
— |
1 |
— |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.08 |
2 |
0.05 |
2.5 |
0.12 |
0.005 |
0.15 |
0.5 |
TC2 titanium alloy was mostly titanium, titanium alloy containing aluminum 3.5 5.0% and 0.8 2.0% of manganese. Its tensile strength is 686-833MPa and yield strength is 560-680MPa. The density is about 4.5-4.55g /cm³, and the coefficient of thermal expansion is small. Hot processing needs to control the process, cold processing will harden. In aerospace for bearing parts, chemical for corrosion resistant pipes and containers.
TC2 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
Mn |
N |
Al |
H |
O |
Other |
More |
|
Min |
— |
— |
0.8 |
— |
3.5 |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.08 |
2 |
0.05 |
5 |
0.012 |
0.15 |
0.5 |
TC3 Titanium alloy belongs to alpha + beta type titanium alloy, titanium alloy al Ti – 5-4 v digital brand R56540, containing vanadium aluminum 4.5 6.0%, 3.5 4.5%. Tensile strength 882-1030MPa, yield strength 785-930MPa, high strength. The density is about 4.4-4.5g /cm³, and the coefficient of thermal expansion is small. Hot working requires high temperature, and cold working hardening is obvious. Mainly used in aerospace key bearing components and high-performance sports equipment.
TC3 Chemical Element Composition and Content
|
Copostsion |
Fe |
C |
N |
V |
Al |
H |
O |
Other |
More |
|
Min |
— |
— |
— |
3.5 |
5.5 |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.08 |
0.05 |
4.5 |
6 |
0.015 |
0.15 |
0.5 |
|
Copostsion |
Fe |
C |
N |
V |
Al |
H |
Y |
O |
Other |
More |
|
Min |
— |
— |
— |
3.5 |
5.5 |
— |
— |
— |
— |
Ti |
|
Max |
0.3 |
0.08 |
0.05 |
4.5 |
6.75 |
0.015 |
0.005 |
0.2 |
0.5 |
Post time: Jan-06-2025