Alloy VT14

Designation

Name	The value
Designation GOST Cyrillic	ВТ14
Designation GOST Latin	BT14
Transliteration	VT14
By chemical elements	ВTe14

Description

Alloy VT14 used: for the manufacture of semi-finished products (sheets, strips, foils, strips, plates, bars, rods, profiles, tubes, forgings and forged blanks) by the strain, and bars; parts and stamp-welded construction, long operating at temperatures up to +400 °C.

Note

Alloy VT14 refers to high-strength heat-treatable titanium (a+b)-alloys of the martensitic type of system Ti-Al-Mo-V. This alloy well deformed in the hot state. Stamping alloy in the annealed or tempered condition with slight deformations can be performed in a cold state, but the basic operation of the forming can be successfully carried out only at elevated temperatures.
Alloy welded satisfactorily by all types of welding, used for titanium. To restore the ductility of welded joints after welding is necessary to conduct annealing. The alloy is used in annealed and thermally hardened state.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 19807-91, OST 1 90000-70, OST 1 90013-81, TU 1-92-39-76
Steel pipes and fittings to them	В62	GOST 21945-76, TU 14-3-513-76
Sheets and strips	В53	GOST 22178-76, GOST 23755-79, OST 1 90218-76, OST 1 90024-94, TU 1-5-276-76, TU 1-5-326-76
Bars	В55	GOST 26492-85, OST 1 90266-86, OST 1 90173-75, OST 1 90107-73, OST 1 90006-86
Bars and shapes	В52	OST 1 92039-75, OST 1 92051-76, OST 1 92064-77
Tubes of non-ferrous metals and alloys	В64	TU 1-5-127-73

Chemical composition

Standard	C	Si	Fe	N	Al	V	Ti	Mo	O	Zr	H
OST 1 90013-81	≤0.1	≤0.15	≤0.25	≤0.05	3.5-6.3	0.9-1.9	Rest	2.5-3.8	≤0.15	≤0.3	≤0.015

Ti is the basis.
According to GOST 19807-91 and OST 1 90013-81 the total content of other impurities is ≤ 0.30%. The mass fraction of hydrogen is indicated for ingots. In flat products from the alloy grade VT14 up to 10 mm thick, the mass fraction of aluminum should be 3.5-4.5%, and in the remaining types of semi-finished products - 4.5-6.3%. In the alloy, a partial replacement of molybdenum by tungsten in an amount not exceeding 0.3% is allowed. The total mass fraction of molybdenum and tungsten should not exceed the norms specified in the table for molybdenum. 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	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d	y, %	KCU, kJ/m²	HB, MPa
Rolled sheet after annealing (samples across the direction of rolling)
0.6-5	-	883-1050	≥8	-	-	-	-
5-10.5	-	834-1050	≥8	-	-	-	-
Rolled sheet. Quenching + artificial aging (samples across the direction of rolling)
0.6-1.5	-	≥1080	≥5	-	-	-	-
1.5-5	-	≥1177	≥6	-	-	-	-
5-7	-	≥1080	≥4	-	-	-	-
7-10.5	-	≥1099	≥4	-	-	-	-
Plate in the delivery condition according to GOST 23755-79 (samples transverse)
11-60	-	≥1080	-	≥4	≥8	-	-
11-60	-	835-1030	-	≥7	≥20	-	-
60-100	-	835-1030	-	≥6	≥14	-	-
Plate on OST 1 90024-94 in the delivery condition. Samples heat-treated (transverse)
11-60	-	1080-1230	-	≥4	≥8	≥245	-
11-60	-	835-1030	-	≥7	≥20	≥343	-
60-100	-	835-1030	-	≥6	≥18	≥343	-
Forgings weighing up to 200 kg after annealing
101-150	-	863-1080	≥7	-	≥20	≥441	255-341
151-250	-	834-1080	≥7	-	≥20	≥392	255-341
100	-	883-1080	≥10	-	≥35	≥490	255-341
Bars hot rolled quenched and aged normal-quality according to GOST 26492-85 (longitudinal samples)
10-12	-	≥1080	≥4	-	≥8	-	-
12-100	-	-	-	-	-	≥196	-
Bars hot rolled quenched and aged high-quality according to GOST 26492-85 (longitudinal samples)
10-12	-	≥1100	≥6	-	≥12	-	-
12-60	-	≥1100	≥6	-	≥12	≥245	-
60-100	-	≥1080	≥4	-	≥8	≥196	-
Bars hot rolled autogenie ordinary quality GOST 26492-85 (longitudinal samples)
10-12	-	≥885	≥8	-	≥22	-	-
100-150	-	≥865	≥6	-	≥15	≥294	-
12-100	-	≥885	≥8	-	≥22	≥294	-
Bars hot rolled autogenie high-quality according to GOST 26492-85 (longitudinal samples)
10-12	-	885-1080	≥10	-	≥35	-	-
100-150	-	865-1080	≥8	-	≥25	≥441	-
12-60	-	885-1080	≥10	-	≥35	≥490	-
60-100	-	885-1080	≥9	-	≥30	≥490	-
Forged square bars and round after annealing
≤150	-	863-1079	≥8	-	≥23	≥441	255-341
151-250	-	834-1079	≥8	-	≥20	≥392	255-341
	-	883-1079	≥8	-	≥25	≥441	255-341
The tubular billet. Annealing
15х15	-	883-1080	≥6	-	≥20	≥196	-
Pipe the seamless hot-rolled, heat-treated in the delivery condition according to GOST 21945-76
	≥784	882-1078	≥8	-	≥25	≥390	-

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	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)	a, 10^-6 1/°C	С, J/(kg · °C)
20	110	4520	837	-	-
100	-	-	921	8	-
200	-	-	1047	82	544
300	-	-	1172	85	586
400	-	-	1292	88	628
500	-	-	1382	89	67
600	-	-	-	87	712

A description of the physical symbols

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

Technological properties

Name	The value
Weldability	without restrictions