| Name | The value |
|---|---|
| Name | The value |
| Designation GOST Cyrillic | 12Х2НМЛ |
| Designation GOST Latin | 12X2HML |
| Transliteration | 12H2NML |
| By chemical elements | 12Cr2НMo |
| Name | The value |
|---|---|
| Name | The value |
| Designation GOST Cyrillic | ВКЛ-3М |
| Designation GOST Latin | BKL-3M |
| Transliteration | VKL-3M |
| By chemical elements | WCoBe-3Mo |
12Х2НМЛ steel is used: for the manufacture of casting parts of aviation, accurate methods of casting in ceramic form of constant models.
Structural alloy steel.
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | Al | Mo | W | Ce | Mg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | Al | Mo | W | Ce | Mg |
| OST 1 90093-82 | 0.09-0.16 | ≤0.025 | ≤0.025 | 0.4-0.7 | 1.9-2.4 | 0.2-0.6 | 0.8-1.2 | Rest | ≤0.3 | ≤0.015 | ≤0.08 | 0.35-0.45 | ≤0.2 | 0.05-0.1 | 0.01-0.05 |
| sT|s0,2, MPa | σU, MPa | d5, % | y, % | KCU, kJ/m2 | HB, MPa | HRC |
|---|---|---|---|---|---|---|
| sT|s0,2, MPa | σU, MPa | d5, % | y, % | KCU, kJ/m2 | HB, MPa | HRC |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 | ||||||
| - | 980-1230 | - | - | - | 285-388 | 30-38 |
| Casting. The preliminary heat treatment: anneal at 890-910 °C, cooling with the furnace to 680 °C, then air, or the normalization at 890-910 °C with following tempering at 670-690 °C to + Final heat treatment: Quenching in oil with 890-910 °C + Vacation at 540-560 °C, air cooling | ||||||
| ≥880 | ≥980 | ≥9 | ≥30 | ≥392 | 285-388 | - |
| Name | Description |
|---|---|
| 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 |
| HB | Brinell hardness number |
| HRC | Rockwell hardness (indenter diamond spheroconical) |
