Steel 30ХСНВФА (ВП30)

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.