Designation
| Name |
The value |
| Designation GOST Cyrillic |
06Х16Н15М3К |
| Designation GOST Latin |
06X16H15M3K |
| Transliteration |
06H16N15M3K |
| By chemical elements |
06Cr16Н15Mo3 |
Description
06Х16Н15М3К steel is used: for the production of bars with special surface finish (silverfish), intended for the manufacture of parts of power equipment continuously operating at temperatures up to +450 °C.
Note
Steel heat-resistant austenitic class.
The recommended maximum operating temperature for a very long time +450 °C.
The temperature of beginning of intensive scaling in air +900 °C.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
TU 14-1-977-74 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Mo |
Nb |
| TU 14-1-977-74 |
0.04-0.08 |
≤0.015 |
≤0.02 |
≤0.8 |
15-17 |
≤0.4 |
14-16 |
Rest |
2.7-3.3 |
0.4-0.9 |
Fe is the basis.
According to TU 14-1-977-74, the chemical composition is presented for steel grade 06H16N15M3K-III. The ratio of niobium to carbon Nb / C should be within the range of 9-13, a reduction in the Nb / C ratio up to 8 is allowed. A deviation of the content of individual elements is possible provided that the remaining requirements of the technical conditions are met: for niobium - plus 0.20%, for carbon - plus 0.010% / minus 0.005%, for silicon - plus 0.20%.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
| The silverfish in the state of delivery on the other 14-1-977-74. Extract at 920-970 °C, for 40-60 minutes, cooling in water or air |
| 10-20 |
≥215 |
≥540 |
≥30 |
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 |
Technological properties
| Name |
The value |
| Macrostructure and pollution |
In the macrostructure of steel on the other 14-1-977-74 controlled 2 treated templeto selected from two workpieces with a diameter of 80-110 mm of each heat, there should be no cracks, gas bubbles, traces of shrinkage, inclusions, niobium crust, delamination, visible to the naked eye. Allowed: - at the Central porosity ≤ 1 point; - at the point of heterogeneity of ≤ 1 point; - phase separation to the square of ≤ 1 point. Layer-by-layer crystallization in the macrostructure of rejection symptom is not. Contamination of metal non-metallic inclusions is tested on 6 samples cut from 2 samples taken from 2 pieces with a diameter of 80-110 mm. In the metal allowed the presence of non-metallic inclusions by the maximum score: - sulphides ≤ 1.0 points, oxides of point ≤ 2.0 points; - oxides of stroke ≤ 2.0 points, silicates, non-deformed ≤ 1.0 points; - nitrides and carbonitrides point ≤ 3.5 points; - nitrides and carbonitrides of niobium stroke ≤ 3.5 points. |
| Particularities of production of goods |
On the other 14-1-977-74 Serebryanka is supplied in heat-treated according to the mode: Exposure at 920-970 °C, for 40-60 minutes, cooling in water or air. Before the heat treatment, the metal must be subjected to drawing with a reduction degree of not less than 20 %. The grain size in points should not exceed 7. |
| Corrosion resistance |
Steel on the other 14-1-977-74 must withstand the test of the ICC method AM (24 hours) according to GOST 6032 pre austenization samples at the temperature of 1050-1100 °C with cooling in air or in water and precipitating by heating at a temperature of 650 °C for 2 hours. The test is performed on 2 specimens cut from 2 samples taken from 2 pieces with a diameter of 80-110 mm of each heat.. |
