Description, the characteristic of the alloy 27KH
Alloys belonging to the precision group are used in the machine-tool industry, in the production of various precision electronic devices, in laser technology, in innovative technologies, in the manufacture of metrological and measuring equipment.
The alloy grade 27KX is magnetically soft, which according to GOST 19693−74 has no more than 4 kA / m coercive force by induction. Magnetically soft materials have a high value of magnetic initial permeability, they can be magnetized to saturation and in weak fields. Magnetically-soft alloys include alloys, whose composition includes cobalt, nickel in addition to iron. A magnetically soft alloy of 27KX is used, as a rule, in electrical machine building, in the manufacture of magnetic field magnetic flux cores, in transformer engineering, in the radio engineering, electrical engineering industries, in automation systems, telemechanics, and computer measuring equipment. The class of magnetically soft materials includes especially pure ferromagnetic iron, low-carbon electrotechnical steels (undoped, siliceous), precision low-coercivity alloys with iron-nickel, iron base, ferrimagnetic and ferromagnetic powder, composite. Such alloys melt in metallurgical special furnaces to obtain the required shapes, exposing them to ingots subsequently forging or rolling. Magnetic soft alloys are widely used in modern industry in the production of transformer cores, in microphones, memory components for computers, magnetic circuits that are designed for operation in seawater, parts for electric machines, magnetic antennas.
The chemical composition of the alloy 27Kh in percent, according to GOST 10994- — - 74
| Mn |
Si |
C |
Ni |
Cr |
P |
S |
Co |
|---|
| 0.2 — 0.4 |
Up to 0.25 |
Up to 0.04 |
Up to 0.3 |
0.3 — 0.6 |
Up to 0.015 |
Up to 0.015 |
26.5 — 28 |
Physical properties of the alloy grade 27KH
| C |
R |
R 10 9 |
L |
T |
A 10 6 |
E 10−5 |
|---|
| J / (kg · deg) |
Kg / m3 |
Ohm · m |
W / (m · deg) |
Grad |
1 / Grad |
MPa |
|---|
| |
|
|
|
100 |
10.7 |
|
| |
7980 |
200 |
|
20 |
|
2.2 |
| Alloy designation 27KX |
|---|
| — Modulus of elasticity of the first kind, [MPa] |
— E |
| — The temperature at which these properties were obtained, [Grad] |
— T |
| — Coefficient of linear thermal expansion (temperature range 20o), [1 / degree] |
-a |
| — Specific electrical resistance, [Ohm · m] |
-R |
| — Density of the material, [kg / m3] |
-r |
| — Heat capacity of the material (coefficient of thermal conductivity), [W / (m · deg)] |
-l |
| — Specific heat of the material (temperature range 20o), [J / (kg · deg)] |
-C |
Mechanical properties of the alloy 27KX at a temperature of 20oC.
| Production |
ST |
Sv |
D5 |
For example. |
The size |
Heat treatment. |
Y |
KCU |
|---|
| Tape, GOST 10160−75 |
295 |
590 |
20 |
|
|
|
|
|
| - |
MPa |
MPa |
% |
- |
Mm |
- |
% |
KJ / m2 |
| The tape is cold-worked., GOST 10160−75 |
|
1080 |
2 |
|
|
|
|
|
| Mechanical properties |
|---|
| — Yield strength for permanent deformation (limit of proportionality), in [MPa] |
ST |
| — The limit of short-term strength, in [MPa] |
Sv |
| — Elongation at break, in [%] |
D5 |
| — Impact strength, in [kJ / m2] |
KCU |
| — Relative narrowing, in [%] |
Y |
| — Brinell hardness, in [MPa] |
Hb |
| Welding: |
|---|
| Boundedly welded |
— The welding process is possible when heated to a temperature of 100−120 oC and further heat treatment |
| Compostable |
— to obtain welded quality joints, the following additional operations are necessary: for welding, heating to a temperature of 200−300 ° C, annealing — heat treatment after welding. |
| Welded without restrictions |
— Welding is carried out without preheating and without further heat treatment |
Price. Buy
The assortment of manufactured products from the alloy 27KHK, presented in LLC «Avek Global» can satisfy any consumer. This alloy belongs to a popular group of metal products, due to its real cost and variety of produced options. The quality of metal products is guaranteed by the absolute observance of all production technological standards. In the absence of the required type of product in the basic version, as well as in case of need of another product variant, we can produce their non-standard sizes by individual order.
