Designation
| Name |
The value |
| Designation GOST Cyrillic |
06Х12Н3Д |
| Designation GOST Latin |
06X12H3D |
| Transliteration |
06H12N3D |
| By chemical elements |
06Cr12Н3Cu |
| Name |
The value |
| Designation GOST Cyrillic |
08Х12Н3Д |
| Designation GOST Latin |
08X12H3D |
| Transliteration |
08H12N3D |
| By chemical elements |
08Cr12Н3Cu |
Description
06Х12Н3Д steel is used: for the production of forgings of various parts of General machinery; forgings, sheets, sheet blanks, and sheet of stamped blanks obtained by hot stamping to produce parts and components of equipment of nuclear power installations (buildings, parts of pumps for nuclear power plants; blades, rims, parts for hydraulic turbines, steam turbines, and exhaust).
Note
Steel corrosion resistant Maraging.
Standards
| Name |
Code |
Standards |
| Sheets and strips |
В33 |
OST 108.360.108-80 |
| Welding and cutting metals. Soldering, riveting |
В05 |
OST 24.300.04-91 |
| Processing of metals by pressure. Forgings |
В03 |
TU 108.1425-86, TU 108.11.917-87 |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 302.02.012-89 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| TU 108.11.917-87 |
≤0.06 |
≤0.025 |
≤0.025 |
≤0.6 |
12-13.5 |
≤0.3 |
2.8-3.2 |
Rest |
0.8-1.1 |
Fe is the basis.
According to TU 108.11.917-87, after processing the steel, a limitation on the content of sulfur and phosphorus is introduced on the OSRV. The total content of sulfur and phosphorus after OSRV ≤ 0.035%.
According to TU 108.1425-86, deviations in chemical composition are allowed: by chroma ± 0.10%, nickel ± 0.10%, copper ± 0.10%, silicon ± 0.10%.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Forging a cross section exceeding 300 mm, sheets, sheet billets supplied without defining corrosional resistance and without the technological releases THAT 108.1425-86. Annealing in air 780-800 °C + Vacation at 600-620 °C, cooling with furnace or air |
| ≤550 |
540-785 |
≥640 |
≥14 |
≥35 |
≥590 |
207-293 |
| ≤550 |
≥490 |
≥590 |
≥10 |
≥30 |
- |
207-293 |
| Forgings, sheets, sheet blanks, stamped sheet workpiece provided with the definition of the corrosion resistance, the manufacturability of leave, determination of the corrosion resistance and manufacturability leave THAT 108.1425-86.Hardening + Vacation |
| ≤550 |
≥490 |
≥590 |
≥15 |
≥35 |
≥590 |
207-293 |
| ≤550 |
≥440 |
≥540 |
≥10 |
≥30 |
- |
207-293 |
| Forgings supplied without determining the corrosion resistance and without the technological releases THAT 108.1425-86. Annealing in air 950-970 °C |
| ≤300 |
≥590 |
≥690 |
≥12 |
≥35 |
≥590 |
207-293 |
| ≤300 |
≥490 |
≥590 |
≥10 |
≥30 |
- |
207-293 |
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 |
Limited weldability steel. Welding methods: RD, RAD, AF, ASH, KG. Necessary preheating and subsequent heat treatment |
| The temperature of forging |
1220-800 °C. |
| Macrostructure and pollution |
On the other 108.1425-86 on the surface of the workpieces should be free of cracks, delamination, captured, sunsets, bubbles, shells, rough katanoi dross and slag inclusions. Macrostructure of steel shall not have cracks, delamination, placenow, shrinkage looseness. Permitted areas of high risk travelmasti with a length of 20 mm. |
| Corrosion resistance |
Under the control of workpieces on the other 108.1425-86 corrosion resistance, corrosion should not be more than 8 g/m2·h. |
| Machinability |
In the hardened and tempered condition when NV 207-293 and σВ=590 N/mm2. Kv=1,3 (hard alloy) Kv=1,0 (high speed steel). |
