Introduction to the main grades or materials and characteristics of titanium and titanium alloys
Main grades or materials of titanium and titanium alloys:
American grades: Gr.1, Gr.2, Gr.3, Gr.4, Gr.5, Gr.7, Gr.9, Gr.12
Chinese grades: TA0, TA1, TA2, TA3, TA9, TA10, TC2, TC4
Titanium and titanium alloys implementation standards: ASTM B348, GB/T2965
chemical composition
Brand | Main Ingredients | no greater than | ||||||||||
Fe | C | N | H | O | Al | V | Ba | Ni | Mo | Impurities | ||
TA1/Gr1 | Ti | 0.20 | 0.08 | 0.03 | 0.015 | 0.18 | 0.4 | |||||
TA2/Gr2 | Ti | 0.30 | 0.08 | 0.03 | 0.015 | 0.25 | 0.4 | |||||
TA 5 /Gr 5 | Ti | 0.40 | 0.0 5 | 0.0 5 | 0.015 | 0.2 0 | 5.5-6.75 | 3.5-4.5 | 0.4 | |||
TA 7 /Gr 7 | Ti | 0.30 | 0.08 | 0.03 | 0.015 | 0.25 | 0.12-0.25 | 0.4 | ||||
TA 9 /Gr 9 | Ti | 0.25 | 0.08 | 0.03 | 0.015 | 0.15 | 2.5-3.5 | 2.0-3.0 | 0.4 | |||
TA 12 /Gr 12 | Ti | 0.30 | 0.08 | 0.03 | 0.015 | 0.25 | 0.6-0.9 | 0.2-0.4 | 0.4 | |||
TA 16 /Gr 16 | Ti | 0.30 | 0.08 | 0.03 | 0.015 | 0.25 | 0.04-0.08 | 0.6-0.9 | 0.2-0.4 | 0.4 | ||
Room temperature mechanical properties of titanium and titanium alloy bars ( GB/T2965—1996)
Brand | Room temperature mechanical properties, not less than | ||||
tensile strength σ b /MPa | Specified residual elongation stress σ r0.2 /MPa | Elongation δ/% | rate of reduction in area Ψ/% | Remark | |
TA0 TA1 TA2 TA3 TA5 TA6 TA7 TA9 TA10 | 280 370 440 540 685 685 785 370 485 | 170 250 320 410 585 585 680 250 345 | twenty four 20 18 15 15 10 10 20 18 | 30 30 30 25 40 27 25 25 25 | |
TB2 | ≤ 980 1370 | 820 1100 | 18 7 | 40 10 | Quenching performance Time performance |
TC1 TC2 TC3 TC4 TC6 TC9 | 585 685 800 895 980 1060 | 460 560 700 825 840 910 | 15 12 10 10 10 9 | 30 30 25 25 25 25 | |
TC10 | 1030 1030 | 900 900 | 12 12 | 25 30 | Forging rod performance Rod rolling performance |
Main properties of titanium and titanium alloys: α-phase titanium containing a certain amount of oxygen, nitrogen, carbon, silicon, iron and other element impurities. It has excellent stamping process performance, good welding performance, is insensitive to heat treatment and organizational type, and has a certain strength under satisfactory plastic conditions.
Industrial pure titanium is graded according to the content of impurity elements. Its strength mainly depends on the content of interstitial elements oxygen and nitrogen. It has high corrosion resistance in seawater, but poor in inorganic acids. It is generally used to manufacture various sheet parts or forgings that work at -253 to 350°C and are not subject to much force. It can also be used to manufacture rivet wires and pipes.
Titanium and titanium alloys have ten major characteristics: low density, high strength, high specific strength, excellent corrosion resistance, good heat resistance, good low-temperature performance, non-magnetic, low thermal conductivity, low elastic modulus, tensile strength close to yield strength, titanium is easily oxidized at high temperatures, and has low damping resistance.
Main applications of titanium and titanium alloys: Titanium and titanium alloys are widely used in the aerospace industry and are known as "space metals"; they are increasingly widely used in ships, weapons, chemicals, metallurgy, electricity, oil and gas, anti-corrosion medium heat exchangers, marine engineering, thermal power stations, manufacturing machinery parts, telecommunications equipment, cemented carbide, sports equipment, etc.
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