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Russian Metals
BT20
Characteristics of the material VT20
| Grade : | VT20 |
| Classification : | Titanium wrought alloy |
| Application: | parts operating for a long time at temperatures up to 500°; good corrosion resistance; pseudo α structure class |
| Foreign analogues: | No data |
Chemical composition in % of VT20 material
GOST 1-19807 - 91
| Fe | C | Si | Mo | V | N | You | Al | Zr | O | H | Impurities |
|---|---|---|---|---|---|---|---|---|---|---|---|
| up to 0.25 | up to 0.1 | up to 0.15 | 0.5 - 2 | 0.8 - 2.5 | up to 0.05 | 85.15 - 91.4 | 5.5 - 7 | 1.5 - 2.5 | up to 0.15 | up to 0.015 | other 0.3 |
Note: Ti is the basis; Ti percentage is approximate.
Technological properties of the material VT16.
| Weldability: | without restrictions. |
Mechanical properties at T=20 o C of VT20 material.
| Assortment | Size | For example. | σin | σT | δ5 | ψ | KCU | Thermal processing |
|---|---|---|---|---|---|---|---|---|
| - | mm | - | MPa | MPa | % | % | kJ/m² | - |
| Annealed sheet, GOST 22178-76 | 930-980 | 6 - 12 | Annealing | |||||
| Rod, GOST 26492-85 | 885 | 7 - 8 | 20 | 250-300 | Annealing | |||
| Rod, high quality, GOST 26492-85 | 885-1130 | 8 - 10 | 20-25 | 300-400 | Annealing | |||
| Plate, GOST 23755-79 | 11 - 100 | 880-1130 | 5-6 | 10-12 | 300 | Annealing |
| Hardness VT20, | HB 10 -1 = 255 - 341 MPa |
| T | E 10-5 | α 106 | λ | ρ | C | R 109 |
|---|---|---|---|---|---|---|
| Hall | MPa | 1/Grad | W/(m deg) | kg/ m3 | J/(kg deg) | Ohm m |
| 20 | 1.12 | 8 | 4450 | 1110 | ||
| 100 | 8.3 | 8.8 | ||||
| 200 | 8.3 | 10.2 | 0.587 | |||
| 300 | 9 | 10.9 | 0.628 | |||
| 400 | 9.2 | 12.2 | 0.67 | |||
| 500 | 9.3 | 13.8 | 0.712 | |||
| 600 | 9.5 | 15.1 |
Designations:
Mechanical properties :
σin - Tensile strength [MPa]
σT - Yield stress [MPa]
δ5 - Specific elongation at fracture [%]
ψ - Reduction of area [%]
KCU - Impact strength [kJ/m²]
HB - Brinell hardness [MPa]
Physical properties :
T - Test temperature [Grade]
E - Young modulus [MPa]
α - Coefficient of linear expansion (20° - T) [1/Grade]
λ - Thermal (heat) condition coefficient [Watt/(m·Grade)]
ρ - Density [kg/m³]
C - Specific heat (range 20° - T) [J/(kg·Grade)]
R - Electrical resistance [Ohm·m]
Weldability:
- Without restrictions – welding is performed without heating and without subsequent heat treatment
- Limited weldability – welding is possible with heating up to 100–120°C and subsequent heat treatment
- Difficult to weld – to obtain high-quality welded joints, additional operations are required: heating up to 200–300°C during welding, and heat treatment after welding (annealing)
VT18 - Titanium deformable alloy
- VT18 - chemical composition, mechanical, physical and technological properties, density, hardness, application
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