Steel 15Х2НМФА

Designation

Name The value
Designation GOST Cyrillic 15Х2НМФА
Designation GOST Latin 15X2HMFA
Transliteration 15H2NMFA
By chemical elements 15Cr2НMoV

Description

15Х2НМФА steel is used: for the manufacture of forgings, sheets (plates), sheet and forged blanks intended for the manufacture of casings, covers and other components of reactor facilities and components power engineering industry; parts and components of equipment of nuclear power plants.

Note

High quality structural steel high-alloyed.

Standards

Name Code Standards
Sheets and strips В33 OST 108.360.108-80, TU 108.11.906-87
Welding and cutting metals. Soldering, riveting В05 RTD 2730.300.02-91, OST 108.300.02-86
Bars and shapes В22 TU 0893-013-00212179-2003
Blanks. Of the workpiece. Slabs В31 TU 108-765-78

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu As V Mo Co
TU 108-765-78 0.13-0.18 ≤0.02 ≤0.02 0.3-0.6 1.8-2.3 0.17-0.37 1-1.5 Rest ≤0.3 ≤0.04 0.1-0.12 0.5-0.7 ≤0.03
Fe is the basis.
According to TU 108-765-78 the chemical composition is given for steel 15Х2НМФА.
According to TU 0893-013-00212179-2003 the chemical composition is given for 15Х2НМФА steel.
For steel 15Х2НМФА-А the content of Sn≤0.005%, Sb≤0.005%, Cu≤0.10%, S≤0.012%, P≤0.010%, As≤0.010%.
For steel 15Х2НМФА Class I, the content of Sn≤0.005%, Sb≤0.005%, Ni = 1.00-1.30%, Cu≤0.08%, S≤0.012%, P≤0.010%, As≤0.010%.
The total content of phosphorus, tin and antimony in the steel grades 15Х2НМФА-А and 15Х2НМФА class I should not be more than 0,015%.
When melting the steels in the main arc furnace and when processing on the OVPV, vanadium is introduced at the rate of 0.10%; when steel is smelted in an arc furnace for refilling ingots with a mass of more than 130 tons, vanadium is introduced at the rate of 0.12%. The vanadium content is determined in the ladle sample, the results are recorded in the quality document and are not delivery.
The total content of sulfur and phosphorus in steel 15Х2НМФА, processed on OSRV, should be no more than 0,020%, in steel 15Х2НМФА -А and in steel 15Х2НМФА class I - no more than 0,015%.
The aluminum content in the steel is determined, the results are recorded in the quality document and are not delivery.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Forgings, sheet (plate), sheet metal; punch burrs (category workpieces a-A, A)
≤400 ≥490 610 ≥15 ≥55 -
Forgings up to 650 mm; sheet (plate), sheet metal up to 400 mm; stamped workpiece to 400 mm (category blanks B)
- ≥390 490 ≥12 ≥45 -
Forgings, sheet (plate), sheet metal; stamped blank (blanks category B)
≤400 ≥440 550 ≥15 ≥55 -
Forgings up to 650 mm; sheet (plate), sheet metal up to 400 mm; stamped workpiece to 400 mm (category blanks B)
- - - - - 340
Forgings, sheet (plate), sheet metal; stamped blank (blanks category B)
≤650 ≥440 550 ≥15 ≥55 -
Forgings, sheet (plate), sheet metal; punch burrs (category workpieces a-A, A)
≤400 ≥440 540 ≥14 ≥50 -
Forgings, sheet (plate), sheet metal; punch burrs (category blanks)
≤400 ≥490 610 ≥15 ≥55 ≥590
Forgings, sheet (plate), sheet metal; punch burrs (category workpieces a-A, A)
- ≤540 - - - 390
- 540-690 - - - 490
Forgings, sheet (plate), sheet metal; punch burrs (category blanks)
- - - - - 390
≤400 ≥440 540 ≥14 ≥50 -

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