| Name | The value |
|---|---|
| Name | The value |
| Designation GOST Cyrillic | 20Х17Н2 |
| Designation GOST Latin | 20X17H2 |
| Transliteration | 20H17N2 |
| By chemical elements | 20Cr17Н2 |
| Name | The value |
|---|---|
| Name | The value |
| Designation GOST Cyrillic | 2Х17Н2 |
| Designation GOST Latin | 2X17H2 |
| Transliteration | 2H17N2 |
| By chemical elements | 2Cr17Н2 |
20KH17N2 steel is used: for the manufacture of heavily loaded details working at the abrasion and impact in slightly aggressive environments such as high strength steel.
Steel corrosion-resistant martensitic class.
20KH17N2 steel has a high hardness (HRC>45).
| Name | Code | Standards |
|---|---|---|
| Name | Code | Standards |
| Processing of metals by pressure. Forgings | В03 | GOST 25054-81 |
| Classification, nomenclature and General rules | В30 | GOST 5632-72 |
| Bars and shapes | В32 | GOST 5949-75, TU 14-11-245-88 |
| Blanks. Of the workpiece. Slabs | В31 | OST 3-1686-90 |
| Thermal and thermochemical treatment of metals | В04 | STP 26.260.484-2004 |
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V | Ti | Mo | W |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V | Ti | Mo | W |
| GOST 5632-72 | 0.17-0.25 | ≤0.025 | ≤0.035 | ≤0.8 | 16-18 | ≤0.8 | 1.5-2.5 | Rest | ≤0.3 | ≤0.2 | ≤0.2 | ≤0.3 | ≤0.2 |
| Section, mm | sT|s0,2, MPa | σU, MPa | d5, % | y, % | KCU, kJ/m2 |
|---|---|---|---|---|---|
| Section, mm | sT|s0,2, MPa | σU, MPa | d5, % | y, % | KCU, kJ/m2 |
| Forgings. Without heat treatment in the state of delivery | |||||
| 100-300 | ≥666 | ≥813 | ≥12 | ≥30 | ≥490 |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil or air from 1000-1050 °C + cold Treatment at minus 70 °C (not less than 2 hours) + Vacation at 250-320 °C, air cooling | |||||
| ≥1200 | ≥1500 | ≥8 | ≥45 | ≥490 | |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil or air with 975-1020 °C + Vacation at 680-700 °C, air cooling | |||||
| ≥650 | ≥850 | ≥16 | ≥45 | ≥490 | |
| 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 |
| Name | The value |
|---|---|
| Name | The value |
| Features of heat treatment | Steel products can be subjected to hardening, leave, annealing. The quenching and tempering of the products is done to achieve: a) maximum corrosion resistance; b) the specified level of mechanical properties. Steel products 20KH17N2 is subjected to heat treatment regime: heating up to 975-1020 °C exposure time 1-2 h, cooling in oil or air, a holiday at 680-700 °C for 30 min + 1 min per 1 mm of maximum wall thickness. |
