Rod, sheet made of titanium gost SP17 alloy
|Grade of titanium alloy:
||Titanium gost SP17|
||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 19807−91
||1.8 — 3.5
||3.5 — 4.5
Note: a basis of alloy constitutes titanium; its percentage content is noted in table.
Physical characteristics of the alloy
||R 10 9
||E 10 -5|
||a 10 6
Mechanical characteristics of alloy at a temperature 20 °C.
|Range of sizes
|GOST 27 265−87
Description of mechanical characteristics
|Flow limit at permanent change of form (proportional limit) [MPa]
|Brinell hardness [MPa]
|Contraction ratio (%)
|Short resistance to rupture [MPa]
|Percent elongation at fracture [ % ]
|Impact hardness [ kJ/m2]
|weldabe without limits
||— welding is done without pre-heating and final heat treatment|
||— welding is possible at heating to 100−120°С and further heat treatment|
||— in order to obtain a qualitative welded joints, it is necessary to perform the following operations: while welding to heat it up to 200−300°C, to do a heat treating (annealing) after welding|
Titanium alloy gost SP17 is not inferior to steel By strength, but it is twice lighter and differs with heat resistance, low heat conduction. Advantages of titanium are very promising in technical fields that require high strength-to-density ratio, heat resistance in combination with high corrosion resistance. Food, chemical industries, aviation, rocket-building, shipbuilding, motor vehicle mechanical engineering cannot do without titanium. Extraordinary characteristics of this metal as a structural material are of the utmost interest in spacecraft engineering.
Alloying increases strength characteristics and corrosion resistance of titanium 2−3 times as much. One of the main alloying elements is aluminium. It is present in almost all types of titanium alloys. Vanadium, molybdenum are the most important alloying components after aluminium. High-resisting titanium 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 at the same time contain aluminium, vanadium, molybdenum in their composition.
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