Precision alloy 29KNBVTYU (Alloy VUS-15)
It is used for structures and pipelines operating at low temperatures; TKLR * 1,000,000 in the temperature range from -258 to +20 and from +20 to +100 ºC no more than 1.0−2.0 [1 / ºC]
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Precision alloys |
With given TCLE |
Chemical composition
| Standard |
Fe, % |
Si, % |
B, % |
Mn, % |
Co, % |
Ti, % |
Ni, % |
Al, % |
Ce, % |
Nb, % |
La, % |
W, % |
ET, % |
|---|
| GOST 10994-74 |
30.4–37.2889 |
< 0.4 |
0.0001–0.03 |
< 0.3 |
28.5–30 |
0.6–1.2 |
26.5–28 |
0.4–0.9 |
0.001–0.3 |
5.9–6.8 |
0.01–0.2 |
0.8–1.4 |
< 0.07 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
|---|
| 20 |
134 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
d5, % |
Treatment |
|---|
| Tape |
GOST 10994-74 |
<2.0 |
Transverse |
|
560–680 |
340–400 |
20–25 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Tape |
GOST 10994-74 |
|
170–200 |
Technological Properties
| Weldability |
Flake Susceptibility |
Propensity to temper brittleness |
|---|
| Difficult to weld |
insensitive |
loathsome |
Limit operating modes
Heat Treatment Modes
Analogues
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| ET |
% |
Total other items |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| B |
% |
Bor |
| Mn |
% |
Manganese |
| Co |
% |
Cobalt |
| Ti |
% |
Titan |
| Ni |
% |
Nickel |
| Al |
% |
Aluminium |
| Ce |
% |
Cerium |
| Nb |
% |
Niobium |
| La |
% |
Lanthanum |
| W |
% |
Tungsten |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$E\cdot 10^{9}$$ |
$$MPa$$ |
Elastic modulus |
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 |
|
|