Wrought titanium alloy 2B2B

In Russia, the alloy is included in 3 standards:

GOST 19807−91 Titanium and wrought titanium alloys. Stamps
GOST 27265−87 Welding wire of titanium and titanium alloys. Technical conditions.
OST 1 92077−91 Titanium alloys. Stamps

For the production of long products, ingots and semi-finished products; parts of special equipment, parts of aircraft manufacturing and instrument making, titanium welding wire.

Classification

Country Section Category
CIS, Russia, Ukraine Titanium, titanium alloys Wrought Titanium Alloys

Chemical composition

Standard Fe, % Si, % Ti, % Ni, % V, % Al, % C, % O, % H, %
GOST 27265-87 < 0.2 < 0.1 94.968–97.5 < 0.04 1–2 1.5–2.5 < 0.07 < 0.12 < 0.002

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ Cp, Дж/кг·К
20 112 8.2 18.85 540

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
240–270

Mechanical properties at 25 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
Wire GOST 27265-87 490–635 16–20

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Forgings GOST 19807-91 210–230

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
no limits not sensitive not inclined

Standards

Standard Description
GOST 27265-87 GOST

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Ti % Titan
Ni % Nickel
V % Vanadium
Al % Aluminium
C % Carbon
O % Oxygen
H % Hydrogen

Description of physical characteristics

Parameter Units of measurement Description
Cp Дж/кг·К Specific heat of material
$$E\cdot 10^{9}$$ $$MPa$$ Elastic modulus
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ Coefficient of thermal (linear) expansion (range 20°C–T)
$$\varkappa$$ $$\frac{W}{m\cdot K}$$ Coefficient of thermal conductivity (the heat capacity of the material)

Description of mechanical properties

Parameter Units of measurement Description
d5 % Elongation at break
$$\sigma_{Y}$$ $$MPa$$ Yield strength
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength

Designation of types of weldability

Parameter Units of measurement Description
no limits Welding is performed without heating and without subsequent heat treatment
Boundedly welded Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures