Steel 10KH18N9L
Designation
| Name |
The value |
| Designation GOST Cyrillic |
10Х18Н9Л |
| Designation GOST Latin |
10X18H9L |
| Transliteration |
10H18N9L |
| The chemical elements |
10Cr18Н9 |
Description
10KH18N9L steel is used: for the manufacture of the 1st, 2nd and 3rd groups of castings of valves for the chemical industry, collectors, exhaust systems, parts, furnace fittings, plates for etching and baskets and other parts operating at temperatures up to +400 °C; the 1st, 2nd and 3rd groups casting parts of valves and actuators to it working in a slightly aggressive media and in a humid atmosphere in the absence of the requirements of resistance to intergranular corrosion, working under the working environment temperature from -253 to +600 °C without restriction of the nominal working pressure; for the manufacture of pipes tsentrobezhnolityh for the manufacture of the coils of the tubular furnace installations production of ammonia, hydrogen, ethylene, carbon disulphide, etc., operating in the temperature range 760−1060 °C and a pressure of 3.92 MPa (40 kgf/cm2); casting parts mining and metallurgical equipment; tsentrobezhnolityh pipes used as components in equipment for metallurgical, engineering, glass, ceramic, mining and processing petrochemical industry, and also intended for the manufacture of blanks and parts used in the composition of the products of aviation and the nuclear industry.
Note
Unstabilized chromium-Nickel corrosion-resistant austenitic steel, heat-resistant to +750 °C.
Steel is unstable in sulfur environments. When the content of carbon in steel is not more than 0.07% resistant against intercrystalline corrosion.
Standards
| Name |
Code |
Standards |
| Castings with special properties (cast iron and steel) |
В83 |
GOST 2176-77, KSt 81-033:2009, TU 4112-78269737-009-05 |
| Castings, steel |
В82 |
GOST 977-88, OST 26-07-402-83, OST 24.920.01-80, OST 3-4365-79, TU 26-02-19-75, TU 108-23.46-88, TU 4112-091-00220302-2006, ST ЦКБА 014-2004 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004 |
| Pipes steel and connecting parts to them |
В62 |
TU 1333-047-00220302-02, TU 1333-003-76886532-2014 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| KSt 81-033:2009 |
≤0.14 |
≤0.03 |
≤0.035 |
1-2 |
17-20 |
0.2-1 |
8-11 |
The rest |
- |
| GOST 2176-77 |
0.07-0.14 |
≤0.03 |
≤0.035 |
1-2 |
17-20 |
0.2-1 |
8-11 |
The rest |
≤0.3 |
Fe is the basis.
According to GOST 977-88, if it is necessary to provide greater resistance to intergranular corrosion, the carbon content can be set not more than 0.07%.
According to GOST 2176-77 the chemical composition is given for steel grade 10Х18Н9Л. Deviations from the norms of chemical composition are allowed: for carbon ± 0.020%; for silicon ± 0.10%; on manganese, copper, chromium and nickel ± 0.10% each; by titanium and tungsten ± 0.050% each; by vanadium, molybdenum and niobium ± 0.020% each.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
| The castings are supplied according to GOST 2176-77 |
| - |
≥176 |
≥441 |
≥25 |
≥35 |
≥981 |
| Casting for STP 26.260.484-2004. Quenching in water from 1050-1100 °C |
| 100 |
≥180 |
≥450 |
≥25 |
≥35 |
≥981 |
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 |
| kJ/m2 |
Toughness |
Technological properties
| Name |
The value |
| Features of heat treatment |
The steel used for the production of foundry goods, not subjected to welding is designed to work in environments do not cause intergranular corrosion. To increase the resistance against General corrosion and eliminate the tendency to intergranular corrosion and to improve the ductility of the casting material are subjected to hardening regime: heating to 1050-1100 °C, cooling in water. 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. For a more complete alignment of a structure, the annealing should be carried out with 1100 °C. |
