Alloy OT4
Alloy VT8M-1
Alloy VT32
Alloy VT35
Alloy VT4
Alloy VT41
Alloy VT5
Alloy VT5-1
Alloy VT6 (VT6sv.)
Alloy VT6C
Alloy VT6h
Alloy VT8
Alloy VT8-1
Alloy VT3-1
Alloy VT9
OT4 alloy
Alloy OT4-0
Alloy OT4-1
Alloy OT4-2
Alloy PT-1M
Alloy PT-3B
Alloy PT-7M
Alloy SPT-2
Alloy TC5
Alloy TC6
Alloy VT15
Alloy 14
Alloy 19
Alloy 27
Alloy 2B
Alloy 37
Alloy 3M
Alloy 40
Alloy 5B
Alloy AT3
Alloy AT6
Alloy VT14
Alloy VT25U
Alloy VT16
Alloy VT18
Alloy VT18U
Alloy VT2 (VT2sv.)
Alloy VT20
Alloy VT20-1 (VT20-1sv.)
Alloy VT20-2 (VT20-2sv.)
Alloy VT22
Alloy VT22I
Alloy VT23
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ОТ4 |
| Designation GOST Latin | OT4 |
| Transliteration | OT4 |
| The chemical elements | SnTe4 |
Description
The OT4 alloy 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, long operating at a temperature of 350−400 °C (at temperatures up to +350 °C for 2000 h and up to +300 °C 30 000 h); welding wire diameter: 1.0−7.0 mm.
Note
Titanium alloy with good corrosion resistance.
A pseudo-alloy OT4 refers to the system Ti-Al-MP, as the alloy OT4−1, but differs in the high content of aluminum. In this regard, it is stronger alloy OT4−1. This alloy has average strength. However, the alloy OT4 less plastic and technologically advanced than the alloy OT4−1. Alloy well deformed in a hot, sparingly in cold conditions.
The basic operations of sheet metal forming (drawing, bending, flanging) are carried out in cold condition. When stamping of complex configuration parts require heating.
The alloy has good thermal stability. Alloy is not thermally hardened, the only form of heat treatment which it is subject, is complete or incomplete (to remove residual stresses) annealing. Full annealing is carried out at 660−710 °C (sheet semifinished products and parts of them) and when 740−790 °C (bars, forgings, stamping, etc., and parts of them); incomplete annealing — when 545−585 °C.
Standards
| Name | Code | Standards |
|---|---|---|
| Non-ferrous metals, including rare metals, and their alloys | В51 | GOST 19807-91, OST 1 90000-70, OST 1 90013-81, OST 1 90002-86 |
| Pipes steel and connecting parts to them | В62 | GOST 21945-76, GOST 22897-86 |
| Sheets and stripes | В53 | GOST 22178-76, GOST 23755-79, OST 1 90218-76, OST 1 90024-94, TU 1-5-106-82, TU 1-92-41-76 |
| 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 |
| Welding and cutting of metals. Soldering, riveting | В05 | OST 1 90015-77 |
| Pipes from non-ferrous metals and alloys | В64 | OST 1 90050-72, OST 1 90050-92, TU 1-5-127-73 |
| Sectional and shaped rolling | В52 | OST 1 92039-75, OST 1 92051-76, OST 1 92064-77, OST 1 90102-73, OST 1 90310-81, OST 1 90317-82, OST 1 90322-82, OST 1 90326-82, TU 1-6-766-76 |
| Metal forming. Forgings | В03 | ST ЦКБА 010-2004 |
Chemical composition
| Standard | C | Mn | Si | Fe | N | Al | Ti | O | Zr | H |
|---|---|---|---|---|---|---|---|---|---|---|
| GOST 19807-91 | ≤0.1 | 0.8-2 | ≤0.12 | ≤0.3 | ≤0.05 | 3.5-5 | The rest | ≤0.15 | ≤0.3 | ≤0.012 |
| OST 1 90015-77 | ≤0.1 | 0.8-2 | ≤0.12 | ≤0.3 | ≤0.05 | 3.5-5 | The rest | ≤0.15 | ≤0.3 | ≤0.006 |
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. The mass fraction of copper and nickel should not be more than 0.10% (in total), including nickel not more than 0.08%.
According to OST 1 90015-77, the chemical composition is given for an alloy of a welding wire with a reduced hydrogen content.
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. The mass fraction of copper and nickel should not be more than 0.10% (in total), including nickel not more than 0.08%.
According to OST 1 90015-77, the chemical composition is given for an alloy of a welding wire with a reduced hydrogen content.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | d | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa | HRC |
|---|---|---|---|---|---|---|---|---|
| Ring welded at OST 1 90317-82 | ||||||||
| 5-20 | - | 690-880 | ≥12 | - | - | - | - | - |
| Sheet metal in delivery condition (the samples across the direction of rolling) | ||||||||
| - | - | ≥422 | - | - | - | - | - | - |
| Ring welded at OST 1 90317-82 | ||||||||
| 5-20 | - | 620-880 | ≥9 | - | - | - | - | - |
| Sheet metal in delivery condition (the samples across the direction of rolling) | ||||||||
| - | - | ≥392 | - | - | - | - | - | - |
| Ring welded at OST 1 90326-82 | ||||||||
| 5-20 | - | 690-880 | ≥12 | - | - | - | - | - |
| 5-20 | - | 620-880 | ≥6 | - | - | - | - | - |
| Sheet metal in delivery condition after annealing (samples across the direction of rolling) | ||||||||
| 0.5-1 | - | 685-885 | ≥20 | - | - | - | - | - |
| 1-1.8 | - | 685-885 | ≥15 | - | - | - | - | - |
| 1.8-10.5 | - | 685-885 | ≥12 | - | - | - | - | - |
| The blades of aircraft engines is made by forging after annealing (compact (M) - the projected area cm2 20-250, medium (C) - 250-550 cm2, bulk (K) - 550-1500 cm 2) | ||||||||
| М, С, К | - | 685-885 | ≥10 | - | ≥30 | ≥392 | 229-302 | 24-35 |
| Plate in the delivery condition according to GOST 23755-79. Without heat treatment (samples transverse) | ||||||||
| 11-20 | - | 685-885 | - | ≥8 | ≥15 | - | - | - |
| 20-60 | - | 685-885 | - | ≥7 | ≥13 | - | - | - |
| 60-150 | - | 685-885 | - | ≥6 | ≥10 | - | - | - |
| Plate on OST 1 90024-94 in the delivery condition. Samples heat-treated (transverse) | ||||||||
| 20-60 | - | 685-885 | - | ≥7 | ≥20 | ≥343 | - | - |
| 60-150 | - | 685-885 | - | ≥6 | ≥20 | ≥343 | - | - |
| 11-20 | - | 685-885 | - | ≥8 | ≥20 | ≥343 | - | - |
| Forgings weighing up to 200 kg after annealing | ||||||||
| 101-250 | - | 638-883 | ≥8.5 | - | ≥20 | ≥343 | 207-285 | - |
| 100 | - | 687-883 | ≥10 | - | ≥30 | ≥343 | 207-285 | - |
| The welding wire in degassed and etched condition delivery | ||||||||
| 1-1.4 | - | ≤834 | - | ≥7 | - | - | - | - |
| 1.4-3 | - | ≤834 | - | ≥9 | - | - | - | - |
| 3-7 | - | ≤834 | - | ≥10.5 | - | - | - | - |
| Bars hot rolled autogenie ordinary quality GOST 26492-85 (longitudinal samples) | ||||||||
| 10-12 | - | ≥685 | ≥8 | - | ≥25 | - | - | - |
| 100-150 | - | ≥635 | ≥8 | - | ≥20 | ≥343 | - | - |
| 12-100 | - | ≥685 | ≥8 | - | ≥25 | ≥392 | - | - |
| Bars hot rolled autogenie high-quality according to GOST 26492-85 (longitudinal samples) | ||||||||
| 10-12 | - | 685-885 | ≥11 | - | ≥30 | - | - | - |
| 100-150 | - | 635-885 | ≥9 | - | ≥21 | ≥343 | - | - |
| 12-60 | - | 685-885 | ≥11 | - | ≥30 | ≥392 | - | - |
| 60-100 | - | 685-885 | ≥10 | - | ≥30 | ≥392 | - | - |
| Bars and rods, hot-rolled. Annealing | ||||||||
| ≥110 | - | 655-885 | ≥9 | - | ≥22 | ≥392 | 207-285 | - |
| 65-100 | - | 685-885 | ≥10 | - | ≥30 | ≥392 | 207-285 | - |
| 10-60 | - | 687-883 | ≥11 | - | ≥30 | ≥392 | 207-285 | - |
| Forged square bars and round after annealing | ||||||||
| 140-250 | - | 638-883 | ≥8.5 | - | ≥20 | ≥343 | 207-285 | - |
| - | 657-883 | ≥10 | - | ≥25 | ≥392 | 207-285 | - | |
| The pressed bars for OST 1 92020-82. Annealing. The longitudinal samples | ||||||||
| 100 | - | 686-883 | - | ≥11 | ≥30 | ≥392 | - | - |
| The tubular billet. Annealing | ||||||||
| - | 686-883 | ≥10 | - | ≥30 | ≥343 | - | - | |
| Pipe the seamless hot-rolled, heat-treated in the delivery condition according to GOST 21945-76 | ||||||||
| ≥637 | 686-882 | ≥10 | - | ≥30 | ≥340 | - | - | |
| Pipe seamless cold-rolled and cold-drawn, heat-treated in the delivery condition according to GOST 22897-86 | ||||||||
| - | 686-833 | ≥10 | - | - | - | - | - | |
| Pipe autogenie with etched surface and rolled, drawn, with outer diameter of 6.0-mm 62,0 | ||||||||
| - | 700-850 | ≥10 | - | - | - | - | - | |
Description mechanical marks
| Name | Description |
|---|---|
| Section | Section |
| sT|s0,2 | Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB | Limit short-term strength |
| d5 | Elongation after rupture |
| d | Elongation after rupture |
| y | The relative narrowing |
| kJ/m2 | Toughness |
| HRC | Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name | The value |
|---|---|
| Weldability | Without restrictions. Alloy OT4 well TIG welded, the contact (point, roller, butt) and electron beam welding. |
