Steel 55KH20G9AN4 (ЭП303)
Steel 10Х11Н20Т2Р (ЭИ696А)
10X23H10 steel
Steel 10Х23Н18 (0Х23Н18)
Steel 12Х25Н16Г7АР (ЭИ835)
Steel 20X23H18 (EI417)
Steel 40Х10С2М (ЭИ107)
Steel 40Х9С2 (4Х9С2)
Steel 45Х22Н4М3 (EP48)
Steel 55Kh20G9AN4 (EP303)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 55Х20Г9АН4 |
| Designation GOST Latin | 55X20G9AH4 |
| Transliteration | 55H20G9AN4 |
| The chemical elements | 55Cr20Mn9NН4 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭП303 |
| Designation GOST Latin | EP303 |
| Transliteration | EhP303 |
| The chemical elements | - |
Description
55KH20G9AN4 steel is used: for the manufacture of valves of automobile engines.
Note
Heat-resistant steel and heat resistant austenitic class.
The recommended maximum operating temperature for a very long time +600 °C.
The temperature of beginning of intensive scaling in air +750 °C.
Standards
| Name | Code | Standards |
|---|---|---|
| Classification, nomenclature and general norms | В30 | GOST 5632-72 |
| Bulls. Blanks. Slabs | В31 | OST 3-1686-90 |
| Sectional and shaped rolling | В32 | TU 14-1-1049-74, TU 14-1-2115-77, TU 14-1-3241-81, TU 14-11-245-88 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | Ti | Mo |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GOST 5632-72 | 0.5-0.6 | ≤0.03 | ≤0.04 | 8-10 | 20-22 | ≤0.45 | 3.5-4.5 | The rest | ≤0.3 | 0.3-0.6 | ≤0.2 | ≤0.3 |
Fe is the basis.
