Designation
| Name |
The value |
| Designation GOST Cyrillic |
16Х |
| Designation GOST Latin |
16X |
| Transliteration |
16H |
| By chemical elements |
16Cr |
Description
Alloy 16KH used: for the manufacture of magnetic cores of different management systems anchors and magnets; parts of electrical machines without protective coatings, working in difficult conditions of exposure medium, temperature and pressure.
Note
Alloy with a high induction in weak and medium-sized fields and a low coercive force; with corrosion resistance in some acidic and corrosive environments.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and General rules |
В30 |
GOST 10160-75, GOST 10994-74, RD 5.9443-84 |
| Thermal and thermochemical treatment of metals |
В04 |
ST ЦКБА 016-2005 |
| Bars and shapes |
В32 |
TU 14-1-2830-79, TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
| TU 14-1-2830-79 |
≤0.015 |
≤0.015 |
≤0.015 |
≤0.3 |
15.5-16.5 |
≤0.2 |
≤0.3 |
Rest |
| GOST 10994-74 |
≤0.015 |
≤0.015 |
≤0.015 |
≤0.3 |
15.5-16.5 |
≤0.2 |
≤0.3 |
Rest |
Fe is the basis.
According to GOST 10994-74 the chemical composition is given for the alloy grade 16X.
According to TU 14-1-2830-79 the chemical composition is given for the alloy grade 16X-IP.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
HB, MPa |
| Blank pieces of pipe fittings according to ST CKBA 016-2005: Annealing: heat in vacuum 10-2 mm of mercury.St. to 1170-1200 °C (exposure 4 h), cooling in a vacuum to 750 °C with скоростью100 °C/h from 750 °C to 100 °C at a velocity of cooling of the furnace to the air |
|
≥196 |
≥250 |
≥25 |
≥65 |
≥109 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| HB |
Brinell hardness number |
Technological properties
| Name |
The value |
| Features of heat treatment |
To obtain characteristic values of mechanical properties and hardness set ST CKBA 010 and to achieve maximum corrosion resistance, parts (workpiece) valves shall be subjected to annealing. To reduce the residual magnetic induction in the magnetic circuit of the electromagnets of the details (blank) should be subjected to high temperature annealing in vacuum. High-temperature annealing in vacuum parts from alloy grade 16X-VI provides obtaining magnetic induction: ≥6000 Gauss in box 1 AB/cm; ≥12000 Gauss in a field of 25 AB/cm; ≥14500 Gauss in a field of 100 aw/cm Before annealing the parts need to be degreased. |
| Machinability |
Machining of parts after annealing is not recommended, as it dramatically reduces the magnetic properties of steel 16X-VI. |
