Steel 07Х18Н9Л (5Х18Н9Л)

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.