Steel 33Х3СНМВФА (СП33; ЭП613)

Designation

Name The value
Designation GOST Cyrillic 33Х3СНМВФА
Designation GOST Latin 33X3CHMBFA
Transliteration 33H3SNMVFA
By chemical elements 33Cr3СНMoWV
Name The value
Designation GOST Cyrillic СП33
Designation GOST Latin CP33
Transliteration SP33
By chemical elements СP33
Name The value
Designation GOST Cyrillic ЭП613
Designation GOST Latin EP613
Transliteration EhP613
By chemical elements -

Description

33Х3СНМВФА steel is used: for the manufacture of forgings, rolled rings, designed for the manufacture of different parts are heavy and power engineering.

Standards

Name Code Standards
Bars and shapes В32 TU 14-1-2713-79
Sheets and strips В33 TU 14-1-4461-88
Blanks. Of the workpiece. Slabs В31 TU 14-1-991-74, TU 14-1-871-74
Processing of metals by pressure. Forgings В03 TU 3-974-76

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Mo W
TU 14-1-991-74 0.3-0.35 ≤0.01 ≤0.01 0.5-0.8 2.8-3.2 0.8-1.2 0.8-1.2 Rest ≤0.15 0.05-0.15 0.35-0.5 0.8-1.2
Fe is the basis.
According to TU 14-1-991-74, the chemical composition is given for steel grade 33X3SNMVFA-VD (SP33-VD, EP613-VD). It is allowed to increase the content of sulfur and phosphorus by about 0010% with a total content of sulfur and phosphorus not more than 0.020%. Deviations in chemical composition are allowed: carbon ± 0.010%, manganese + 0.050 / -0.20%, silicon, chromium, nickel and tungsten ± 0.050% each, molybdenum ± 0.030%, vanadium +0.020%. Partial or complete replacement of tungsten with molybdenum is allowed, based on: 2.2 parts by weight of tungsten are replaced by one part by weight of molybdenum. When the tungsten is completely replaced, the molybdenum content should be in the range 0.75-0.95%.
According to TU 14-1-4461-88, the chemical composition of the steel must comply with the standards indicated in Table 2 (Appendix 1), sent on request by the Central Research Institute of Chemical Technology named after Bardin. The sulfur content of sulfur is not more than 0.011%, phosphorus is not more than 0.015%, while the total content of sulfur and phosphorus should not be more than 0.022%. The residual copper content should not be more than 0.15%. With the consent of the consumer, it is allowed - up to 0.20%. In the finished sheets the following deviations in chemical composition from the norms indicated in Table 2 are allowed: carbon + 0.02 / -0.010%; tungsten ± 0.10%; manganese, silicon, chromium and nickel ± 0.050%; molybdenum ± 0.030%; vanadium +0.020%. Partial or complete replacement of tungsten by molybdenum from the calculation of 2.5 mass fraction of tungsten is allowed with one mass fraction of molybdenum.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Ring clinocerinae on the other 14-1-2713-79. In the delivery condition specified cut direction samples. Annealing in air or air-blown with 930-980 °C + Vacation at 280-360 °C (delay 2-3 hours), air cooling
≥1320 ≥1670 ≥7.5 ≥28 ≥343
≥1320 ≥1670 ≥8 ≥35 ≥392
The leaves of g/K and x/K on the other 14-1-4461-88. Annealing in air or in oil with 930-980 °C + Vacation at 280-360 °C, air cooling (heating for hardening must eliminate the carburization and decarburization, the samples transverse)
- ≥1670 ≥7 - -
Forgings on the other 14-1-991-74. Hardening in air, 930-980 °C + Vacation at 280-360 °C (delay 2-3 hours), air cooling
≥1320 ≥1670 ≥8 ≥35 ≥441
≥1320 ≥1670 ≥7.5 ≥28 ≥343

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

Technological properties

Name The value
Macrostructure and pollution Macrostructure of steel forgings on the other 14-1-991-74 when checking on the etched templeto cut from reforged control of the workpiece cross-section of 80-100 mm square, should not have traces of shrinkage, bubbles, cracks, inclusions, delaminations, and intergranular cracks visible to the naked eye. The macrostructure in the evaluation according to GOST 10243 on scales No. 1, 2, 3b, 4, 5, 6, 7 defects are not permitted above the first score, and the rating scales 9 and 10A is not above the third grade. Metal forgings should not be placenow visible to the naked eye. Pollution steel non-metallic inclusions as measured by scales GOST 1778 at a magnification of 100 times should not exceed average score for stroke oxides, oxides point, silicates fragile, sulphides and silicates, non-deformed 1,5 and 1,0 silicates plastic.