Designation
| Name |
The value |
| Designation GOST Cyrillic |
10Х3ГНМЮА |
| Designation GOST Latin |
10X3GHMJuA |
| Transliteration |
10H3GNMYuA |
| By chemical elements |
10Cr3MnНMoAl |
Description
10Х3ГНМЮА steel is used: for the manufacture of forgings, pipe, rolled and forged blanks used for the production of hot-deformed pipes of different parts of plant engineering and chemical engineering.
Note
Steel low carbon martensitic class.
Standards
| Name |
Code |
Standards |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 14-1-4408-88 |
| Processing of metals by pressure. Forgings |
В03 |
TU 3-202-83 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Al |
Mo |
| TU 14-1-4408-88 |
0.08-0.12 |
≤0.025 |
≤0.025 |
0.8-1.2 |
3-3.5 |
0.17-0.37 |
0.8-1.2 |
Rest |
≤0.3 |
0.01-0.03 |
0.2-0.3 |
Fe is the basis.
According to TU 14-1-4408-88 the chemical composition is given for steel grade 10Х3ГНМЮА. The presence of tungsten to 0.20%, titanium to 0.30% and vanadium to 0.050% are not a defect. In the finished pipe billet, deviations in chemical composition are allowed: by carbon +0.010%, by silicon + 0.030 / -0.020%, by manganese ± 0.050%, by aluminum +0.020%, by chromium ± 0.050%, by nickel -0.050%, by molybdenum ± 0.020%. The steel is smelted in an electric arc furnace or in a main open-hearth furnace, followed by treatment in a ladle with synthetic slags and liquid ligature.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Bars hot rolled on the other 14-1-4229-87 and the tubular billet, rolled and forged on the other 14-1-4408-88. Annealing in air from 930 °C±10 ° C + Vacation at 200-400 °C (exposure 2 hours), air cooling (samples transverse) |
| 20-30 |
≥981 |
≥1079 |
≥10 |
≥45 |
≥588 |
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 |
| Flock-sensitive sensitivity |
A tube blank on the other 14-1-4408-88 are delivered after anti-flake (obezvrezivate), ATI |
| Pressure treatment |
Clan (extract ratio) tube blank on the other 14-1-4408-88 excluding precipitation should be at least 1.6. |
| Macrostructure and pollution |
Macrostructure of steel billets on the other 14-1-4408-88 on the etched transverse templeto or fracture should not have podnasadochnogo looseness, bubbles, cracks, placenow, delaminations, voids and foreign inclusions that are visible without using the magnifying devices. Defects in the macrostructure should not exceed norms: - point heterogeneity - 2 points; - the Central porosity - 2 points; - exudation square - 2 points; - Pousada liquation - 1 points. Common spotted and boundary liquation, subcortical bubbles and intergranular cracks are not allowed. The contamination of steel billets, non-metallic inclusions on the average score must not exceed: - oxides of stroke (OS) - 3.0 points; - point oxides (ON) - 2.0 points; - silicates fragile (CX) - 3.0 points; - silicates plastic (SP) - 3.0 points; - silicates, non-deformed (CH) - 2.0 points; - sulphides (C) - 3.0 points. |
