Designation
| Name |
The value |
| Designation GOST Cyrillic |
07Х18Н9Л |
| Designation GOST Latin |
07X18H9L |
| Transliteration |
07H18N9L |
| By chemical elements |
07Cr18Н9 |
| Name |
The value |
| Designation GOST Cyrillic |
5Х18Н9Л |
| Designation GOST Latin |
5X18H9L |
| Transliteration |
5H18N9L |
| By chemical elements |
5Cr18Н9 |
Description
07Х18Н9Л steel is used: for the manufacture of castings parts, heat-resistant at temperatures up to +750 °C; goods, not subjected to welding is designed to work in environments do not cause intergranular corrosion; valves for the chemical industry, collectors, exhaust systems, parts, furnace fittings; plates for pickling baskets.
Note
Unstabilized corrosion resistant chromium-Nickel austenitic steel, heat-resistant to +750°C and has resistance against intergranular corrosion.
Standards
| Name |
Code |
Standards |
| Castings with special properties (iron and steel) |
В83 |
GOST 2176-77 |
| Steel castings |
В82 |
OST 24.920.01-80 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 2176-77 |
≤0.07 |
≤0.03 |
≤0.035 |
1-2 |
17-20 |
0.2-1 |
8-11 |
Rest |
≤0.3 |
Fe is the basis.
According to GOST 2176-77 the chemical composition is given for steel grade 07H18N9L. 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 properties
| sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| 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 |
| ≥180 |
≥450 |
≥25 |
≥35 |
≥1000 |
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 |
| 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. |
