A rod, a welded wire, an electrode made of titanium gost 2V alloy
Characteristics of alloy grade titanium gost 2V
| Description | Identification |
| Grade of titanium alloy | Titanium gost 2V |
| Alloy classification | Titanium deformable alloy |
| Industrial usage of alloy | Manufacture of ingots, semi-finished products, titanium wire, rolled sections, details of special equipment, details for instrument engineering and aviation |
Percentage composition according to GOST 27265−87
| V | Al | Ti | Si | C | Fe | O | H | N | Residual elements |
| 1 — 2 | 1.5 — 2.5 | 94.79 — 97.2 | ≤0.1 | ≤0,07 | ≤ 0.2 | ≤0,12 | ≤0,002 | ≤0,04 | total 0,3 |
Alloying increases strength characteristics and corrosion resistance of titanium 2−3 times as much. One of the main alloying elements of industrial titanium alloys is aluminium. Vanadium, molybdenum are the most important alloying components after aluminium. Heat-resisting alloys are based on a ternary system — titanium-aluminium-molybdenum. Extra-high tensile titanium alloys are based on titanium-aluminium-vanadium. Due to well-established trend of multicomponent alloying, most of modern titanium alloys contain aluminium, vanadium, molybdenum at the same time in their composition.
Mechanical characteristics (temperature is 20°С).
| Range of sizes | F.e. | Size | % | MPa | MPa | kJ/m2 |
% | - |
| Wire, GOST 27265−87 | 16−20 | 490−635 | ||||||
| - | - | mm | d5 | sT | sv | KCU | y | Heat treatment. |
sv — Short-time strength limit
d5 — Elongation on failure
Physical characteristics of titanium alloy 2V
| J/(kg/degree) | Ohm-m | kg/m3 |
1/Degree | MPa | Degree | V/(m/degree) |
| 4505 | 1,12 | 20 | 18,85 | |||
| C | R 10 9 | r | a 10 6 | E 10- 5 | T | l |
| 540 | 8,2 | 100 |
Titanium grade gost 2V has high strength-to-density ratio, corrosion resistance, paramagnetism. It can be easy welded, but it poorly conducts heat.
| Description of mechanical characteristics | Identification |
| Flow limit at permanent deformation (proportional limit) [MPa] | sT |
| Brinell hardness [MPa] | HB |
| Contraction ratio (%) | y |
| Short resistance to rupture [MPa] | sv |
| Percent elongation at fracture [ % ] | d5 |
| Impact hardness [ kJ/m2] | KCU |
Products are manufactured under an absolute control at all production stages. Thus, this provides 100% guarantee of quality.
| Description of physical characteristics | Identification |
| Temperature at which are obtained actual characteristics | 20°С |
| Lineal expansion coefficient α x 106 at 100 °C [1/ °С] | 8.2 |
| Density g/cm3 |
4.45 |
| Module of elasticity 1 sort Е [MPa] x 10-5 | 1.12 |
| Specific heat of alloy at 200 °C [J (kg/deg)] | 0.586 |
| Heat conduction coefficient, l [V/(m/deg)] | 8.37 |
| Specific electric resistance Оhm-mm2/m | 1.6 |
Weldability
| Identification | Description |
| weldable without limits | — welding is done without previous heating of parts and without final heat treatment. High affinity of hot titanium to oxygen and nitrogen requires inert gas protection of not only a welding zone, but a reverse side of a seam, and all those zones of metal that are heated to 400 degrees as well |
| limitedly weldable | — qualitative welding requires pre-heating of parts to a temperature of 100−120°C and a final heat treatment |
| hardly weldable | — in order to obtain a qualitative welded joints, it is necessary to perform the following operations: to heat parts up to 200−300°C before welding; to do a heat treatment (annealing) after welding |
Relevance
Titanium gost 2V has great prospects for applications in those spheres where are required high strength-to-density ratio, heat resistance in combination with high corrosion resistance. It is popular in food, chemical industries; in aviation, shipbuilding, rocket engineering, high-speed transport, sports equipment. Extraordinary characteristics of titanium are of the utmost interest in spacecraft engineering in the capacity of a structural material.
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