Steel 02Х18Н11
Designation
| Name |
The value |
| Designation GOST Cyrillic |
02Х18Н11 |
| Designation GOST Latin |
02X18H11 |
| Transliteration |
02H18N11 |
| The chemical elements |
02Cr18Н11 |
Description
02Х18Н11 steel is used: for the manufacture of products operating in nitric acid environments at elevated temperatures; for pipe billet production; equipment for chemical industry (nitric acid preheaters, evaporators ammonium nitrate, refrigerators capacitors, etc.); heat exchangers, condensers-oxidizers, tail gas heaters; for all connections of equipment installed in radioactive environments and in contact with aggressive environment.
Note
Low carbon steel corrosion resistant austenitic class.
Analogue steel 03Х18Н11 (Conclusion niikhimmash).
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006 |
| Welding and cutting of metals. Soldering, riveting |
В05 |
OST 95 10441-2002 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004 |
| Sheets and stripes |
В33 |
TU 14-1-3071-80, TU 14-1-2450-78, TU 14-1-5142-92 |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-3183-81, TU 14-1-3931-84, TU 14-1-2132-77 |
| Pipes steel and connecting parts to them |
В62 |
TU 14-3-1401-86, TU 14-158-135-2003, TU 14-3-1339-85, TU 14-158-137-2003 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Mo |
| TU 14-1-3183-81 |
≤0.025 |
≤0.02 |
≤0.025 |
≤2 |
17-19 |
≤0.25 |
10.5-12.5 |
The rest |
- |
| TU 14-158-137-2003 |
≤0.025 |
≤0.02 |
≤0.025 |
≤2 |
17-19 |
≤0.25 |
10.5-12.5 |
The rest |
≤0.3 |
Fe is the basis.
According to TU 14-158-137-2003, cerium and other rare-earth metals can be introduced by 0.2-0.3%, which are not determined by chemical analysis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
| Procurement of g/K and forged, billet. Quenching in water from 1080-1120°C (heat treated in cross-section 25 mm) |
|
≥186 |
≥480 |
≥45 |
- |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water from 1050-1100 °C |
|
≥200 |
≥520 |
≥45 |
≥50 |
| Seamless cold-worked tubes-hardened state of delivery on the other 14-3-1401-86 |
|
≥186 |
≥460 |
≥45 |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
7900 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Weldability |
automatic arc welding with non-consumable electrode in a continuous mode, manual argon arc welding with non-consumable electrode (filler or without filler material). Allowed the use of automatic arc welding submerged arc and manual arc welding with coated electrodes. |
| Microstructure |
On the other 14-1-3183-81 content of alpha-phase should not exceed 1.0%. |
| Features of heat treatment |
Steel products intended for use in aggressive environments and can be tempered, annealed. To ensure high corrosion resistance and an optimal combination of strength and plasticity of steel products are subjected to hardening from 1050-1100 °C and cooled in water or air. The holding time at the heating for hardening to products with a wall thickness up to 10 mm - 30 min, over 10 mm - 20 min + 1 min per 1 mm maximum thickness. In order to remove residual stresses resulting from the plastic deformation and welding, and also prevent warpage and stress corrosion cracking products is subjected to annealing at 870-900 °C, exposure time of 2-3 h, cooling with the furnace to 300 °C (speed of 50-100 °C/h), then - on the air. |
| Corrosion resistance |
The steel is resistant to nitrous gases at temperatures up to +80 °C. Steel 02Х18Н11 has a high resistance to intergranular corrosion than steel of the brand 08KH18N10T and a high resistance to stab corrosion than steel of the brand 12Х18Н12Б. |
