Steel 12KH2NM1FA

Designation

Name The value
Designation GOST Cyrillic 12Х2НМ1ФА
Designation GOST Latin 12X2HM1FA
Transliteration 12H2NM1FA
By chemical elements 12Cr2НMo1V

Description

12KH2NM1FA steel is used: for the manufacture of parts and welded structures operating at temperatures up to +450−500 °C.

Note

Alloy structural steel high quality with low carbon content. Steel 12KH2NVFMA strengthen by heat treatment (quenching in oil with subsequent tempering or normalizing with tempering).

Standards

Name Code Standards
Sheets and strips В33 GOST 11268-76, GOST 11269-76
Sheets and strips В23 GOST 82-70
Bars and shapes В32 TU 14-1-1885-85, TU 14-1-950-74

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % d10 y, % KCU, kJ/m2 HB, MPa
Rods made of steel 12KH2NM1FA on the other 14-1-1885-85. Quenching in oil with 895-925 °C + Vacation at 480-510 °C, air cooling. In the graph KCU KCU values are shown along the fiber/KCU across the grain
Образец 15х15 - ≥885 ≥980 ≥12 - ≥55 ≥784/- 285-374
Steel hot-rolled sheet (4-60 mm) 4-th and 5-th categories. Quenching in oil or air from 910±15 °C, leave at 500-550 °C, air cooling
- - ≥980 ≥11 - - ≥590 -
A sheet of thin (≤3.9 mm) hot - and cold-rolled. Annealing in air at 910 °C + vacation at 500-550 °C, air cooling
- - ≥981 ≥11 - - - -
Flats on the other 14-1-4118-2004
≤3.9 - - 490-736 ≥15 ≥11 - - -
Bars and strip hot rolled and forged. Quenching in oil with 995-925 °C + vacation, air cooling
Образец 15х15 500-550 ≥883 ≥981 ≥12 - ≥55 ≥785 269-341
Образец 15х15 200-300 ≥932 ≥1079 ≥10 - ≥50 ≥687 302-388

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
d10 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Technological properties

Name The value
Macrostructure and pollution Macrostructure of steel when testing for the breaks in the longitudinal direction and transverse templeto selected from rolled, should not have shrinkage, porosity, bubbles, cracks, delamination, inclusions and placenow and defects of fracture, listed in Annex 3 GOST 10243. The Central porosity, point heterogeneity and phase separation in the square should not exceed 1 points; layer-by-layer crystallization and the bright loop - 3 points reference scales GOST 10243. All other defects under GOST 10243, are not allowed. Pollution steel non-metallic inclusions should be according to the average score is not higher (in points): oxides of point 1,5, 2,0 stroke oxides, silicates fragile 1,0, 1,0 silicates plastic, silicates, non-deformed 2,5, 2,5 sulfides, nitrides stroke and point 1,0.