Alloy VT5

Designation

Name The value
Designation GOST Cyrillic ВТ5
Designation GOST Latin BT5
Transliteration VT5
By chemical elements ВTe5

Description

Alloy VT5 is used: for the manufacture of semi-finished products (sheets, strips, foils, strips, plates, bars, rods, profiles, tubes, forgings and forged blanks) by the method of deformation, and also ingots; consumable electrode vacuum-arc remelting used as charge in the manufacture of shaped castings; welded parts operating at temperatures from -253 to +400 °C; the details of the control systems, internal set of fuselage, of welded parts and components, long-running (up to 10,000 hours) at temperatures up to +400 °C.

Note

Alloy with high corrosion resistance.
Alloy ВТ5Л doped only with aluminum:
a) aluminium is widely distributed in nature, available and relatively cheap;
b) the density of aluminium is much less than the density of titanium and, therefore, the addition of aluminum increases the specific strength of the alloy;
C) with increase of aluminum content increases the high temperature strength and creep resistance of the titanium alloy;
g) aluminium increases the modules of elasticity;
d) with the increase of aluminum content in the alloy decreases the tendency to hydrogen embrittlement.
Alloy VT5 differs from the technical titanium of high strength and heat resistance. However, the aluminum greatly reduces the technological ductility of titanium. VT5 alloy deformed in hot conditions: forged, rolled, stamped. From it produce rods, profiles, forgings, stamping. However, it is preferred to use not deformed condition, and in the form of shaped castings (in this case, it is assigned a brand ВТ5Л).

Standards

Name Code Standards
Non-ferrous metals, including rare, and their alloys В51 GOST 19807-91, OST 1 90000-70, OST 1 90013-81
Bars В55 GOST 26492-85, OST 1 92020-82, OST 1 90266-86, OST 1 90173-75, OST 1 90107-73, OST 1 90006-86, TU 1-9-672-78
Bars and shapes В52 OST 1 92039-75, OST 1 92051-76, OST 1 92064-77, OST 1 90099-73, TU 1-9-731-80
Welding and cutting metals. Soldering, riveting В05 TU 1-9-77-85

Chemical composition

Standard C Si Fe N Al V Ti Mo O Zr H
OST 1 90013-81 ≤0.1 ≤0.12 ≤0.3 ≤0.05 4.5-6.2 ≤1.2 Rest ≤0.8 ≤0.2 ≤0.3 ≤0.015
Ti is the basis.
According to GOST 19807-91 and OST 1 90013-81 the total content of other impurities (except vanadium and molybdenum) ≤ 0.30%. The mass fraction of hydrogen is indicated for ingots. The mass fraction of chromium and manganese should not exceed 0.15% (in total). The mass fraction of copper and nickel should not be more than 0.10% (in total), including nickel not more than 0.08%.

Mechanical properties

Section, mm σU, MPa d5, % d y, % KCU, kJ/m2 HB, MPa
Forgings weighing up to 200 kg after annealing
101-250 716-932 ≥5 - ≥15 ≥441 229-321
The pressed bars for OST 1 92020-82. Annealing. The longitudinal samples
100 735-932 - ≥10 ≥25 ≥294 -
Forgings weighing up to 200 kg after annealing
100 736-932 ≥10 - ≥25 ≥294 229-321
The pressed bars for OST 1 92020-82. Annealing. The longitudinal samples
100 ≥422 - - - - -
Bars hot rolled autogenie ordinary quality GOST 26492-85 (longitudinal samples)
10-12 ≥735 ≥8 - ≥20 - -
100-150 ≥685 ≥6 - ≥15 ≥294 -
12-100 ≥735 ≥8 - ≥20 ≥294 -
Bars hot rolled autogenie high-quality according to GOST 26492-85 (longitudinal samples)
10-12 735-930 ≥10 - ≥25 - -
100-150 715-930 ≥6 - ≥18 ≥490 -
12-60 735-930 ≥10 - ≥25 ≥490 -
60-100 735-930 ≥10 - ≥25 ≥294 -
Bars and rods, hot-rolled. Annealing
≥110 715-930 ≥6 - ≥18 ≥490 229-321
65-100 735-930 ≥10 - ≥25 ≥392 229-321
10-60 736-932 ≥10 - ≥25 ≥490 229-321
Forged square bars and round after annealing
140-250 716-932 ≥6 - ≥16 ≥490 229-321
736-932 ≥7 - ≥20 ≥490 229-321

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
d Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Physical characteristics

Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C С, J/(kg · °C)
20 105 4400 - 1080 - -
200 - - 1047 1150 89 586
300 - - 113 1180 95 628
400 - - 1256 - 104 67
500 - - 1424 1200 106 712
600 - - 1549 1230 108 754
100 - - - - 83 -

A description of the physical symbols

Name Description
Е The normal elasticity modulus
l Coefficient of thermal conductivity
R UD. the resistivity
С Specific heat

Technological properties

Name The value
Weldability without restrictions