Designation
| Name |
The value |
| Designation GOST Cyrillic |
30ХСНВФА |
| Designation GOST Latin |
30XCHBFA |
| Transliteration |
30HSNVFA |
| By chemical elements |
30CrСНWV |
| Name |
The value |
| Designation GOST Cyrillic |
ВП30 |
| Designation GOST Latin |
BP30 |
| Transliteration |
VP30 |
| By chemical elements |
WP30 |
Description
30ХСНВФА steel is used: for the manufacture of semi-finished strips and rods, sheets, pipes and tubes used for manufacture of capacitive equipment of power plant engineering.
Note
Of high strength steels with a temporary tear resistance up to 980 MPa.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and General rules |
В30 |
GOST В 25854-83 |
| Sheets and strips |
В33 |
TU 14-1-1369-75, TU 14-1-4461-88 |
| Bars and shapes |
В32 |
TU 14-1-1447-75 |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 14-1-4489-88, TU 14-1-4878-90 |
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| The leaves of g/K and x/K on the other 14-1-1369-75. Quenching in oil with 900-940 °C + Vacation at 300-380 °C, air cooling (in cross-section the thickness of the sheets) |
| 0.8-1.5 |
≥1225 |
≥1470 |
≥6.5 |
- |
- |
- |
| 1.6-2.5 |
≥1225 |
≥1470 |
≥7.5 |
- |
- |
- |
| 2.6-5.6 |
≥1274 |
≥1519 |
≥7 |
- |
- |
- |
| 2.6-5.6 |
≥1274 |
≥1519 |
≥7.5 |
- |
- |
- |
| The leaves of g/K and x/K on the other 14-1-4461-88. Quenching in oil with 910-940 °C + Vacation at 300-380 °C, air cooling (heating for hardening must eliminate the carburization and decarburization, the samples transverse) |
|
- |
≥1520 |
≥7 |
- |
- |
- |
| Bars and stripes on the other 14-1-1447-75. Quenching in oil with 900-940 °C + Vacation at 300-380 °C (delay 2-3 hours), air cooling |
|
≥1225 |
≥1520 |
≥8 |
≥35 |
≥390 |
- |
| The bars heat treated in the delivery condition on the other 14-1-1447-75 (longitudinal samples) |
|
≥1225 |
≥1520 |
≥8 |
≥35 |
≥392 |
≥241 |
| Bullion on the other 14-1-4878-90. Samples from the control and the forged (rolled) billet square 60-80 mm in the longitudinal direction. quenching in oil with 900-940 °C + Vacation at 300-380 °C (delay 2-3 hours), air cooling |
|
≥1225 |
≥1520 |
≥8 |
≥35 |
≥392 |
- |
| Tubular billet on the other 14-1-4489-88. Annealing in air 930-970 °C + Vacation at 310-340 °C (exposure 2 hours), air cooling (longitudinal samples) |
|
- |
≥1049 |
≥10 |
- |
- |
- |
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 |
| KCU |
Toughness |
| HB |
Brinell hardness number |
Technological properties
| Name |
The value |
| Weldability |
For welding with direct current designs of heat-treatable high-strength steels and for surfacing layers of medium hardness (3 layer 320 LC) are applied to the electrodes SSSI - 13 and wire brand 18ХМА. The deposition rate of 10 g/A-h |
| Pressure treatment |
Tubular billet on the other 14-1-4489-88 must be supplied ukonom at least 3.0. |
| Macrostructure and pollution |
Macrostructure of steel billets on the other 14-1-4489-88 when checking for templeto treated, or the fracture should not have shrinkage, podsadecki porosity, subcortical bubbles, cracks, delamination, non-metallic microflute, placenow and should not exceed norms: Central porosity - 2 points, point heterogeneity - 2 points; - exudation square - 2 points. Allowed control of macrostructure to carry out the method of ultrasonic inspection according to the method of the manufacturer. Pollution steel non-metallic inclusions (for maximum points) must not exceed: - oxides of stroke (OS) - 4 points; - point oxides (FROM) - 4 points; - silicates fragile (AU) - 4 points; - silicates plastic (SP) - 4 points; - silicates, non-deformed (CH) - 4 points; - sulphides (C) - 4 points. The contamination of steel ingots on the other 14-1-4878-90 non-metallic inclusions, as measured according to GOST 1778 at the maximum point should not exceed 4.0 points for each type of inclusions (OS, OT, SH, SP, SN, S). |
| Microstructure |
The size of austenite grains in the steel should conform 5-8 number according to GOST 5639. |
