Steel 04KH18N10 (ЭИ842)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
04Х18Н10 |
| Designation GOST Latin |
04X18H10 |
| Transliteration |
04H18N10 |
| The chemical elements |
04Cr18Н10 |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ842 |
| Designation GOST Latin |
EI842 |
| Transliteration |
EhI842 |
| The chemical elements |
- |
Description
04KH18N10 steel is used: for the manufacture of welded equipment operating in environments of increased aggressiveness (nitric acid, nitrate environments, acetic acid, alkaline solutions and salts); teploobmennikov, muffles, pipes, fittings furnace parts, electrodes incendiary spark candles.
Note
Steel corrosion resistant.
Unstabilized chromium-Nickel steel of austenitic class.
04KH18N10 steel has a high resistance to intergranular corrosion than steel grade 08CR18NI10TI.
Standards
| Name |
Code |
Standards |
| Test methods. Packaging. Marking |
В09 |
GOST 11878-66 |
| Metal forming. Forgings |
В03 |
GOST 25054-81 |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Sectional and shaped rolling |
В32 |
GOST 5949-75, TU 14-11-245-88 |
| Sheets and stripes |
В33 |
GOST 7350-77 |
| Pipes steel and connecting parts to them |
В62 |
GOST 9940-81, GOST 9941-81, TU 14-1-5410-2001, TU 14-3-1654-89 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90, TU 14-1-565-84 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5632-72 |
≤0.04 |
≤0.02 |
≤0.035 |
≤2 |
17-19 |
≤0.8 |
9-11 |
The rest |
≤0.3 |
≤0.2 |
≤0.2 |
≤0.3 |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
| Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water or air from 1050-1100 °C |
| - |
≥175 |
≥490 |
≥45 |
- |
| Forgings ≤100 mm. Hardening in air, 1020-1100 °C |
|
≥157 |
≥441 |
≥40 |
≥45 |
| Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water with 1020-1100 °C |
|
≥155 |
≥440 |
≥40 |
≥55 |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1050-1100 °C |
|
≥210 |
≥510 |
≥43 |
- |
| Tubes in the delivery condition, without heat treatment |
| - |
- |
≥441 |
≥40 |
- |
| - |
- |
≥490 |
≥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 |
Technological properties
| Name |
The value |
| Features of heat treatment |
Steel used for products, 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 workpiece material is subjected to annealing 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. |
