| Name | The value |
|---|---|
| Name | The value |
| Designation GOST Cyrillic | 20Г2Р |
| Designation GOST Latin | 20G2P |
| Transliteration | 20G2R |
| By chemical elements | 20Mn2B |
20Г2Р steel is used: for the manufacture of high strength fasteners by cold forging.
Steel boron alloy. Hot rolled and gorjachekatannyj rental comes with standard hardenability.
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | Al | B |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | Al | B |
| TU 14-1-5490-2004 | 0.2-0.25 | ≤0.015 | ≤0.02 | 0.9-1.3 | 0.15-0.3 | ≤0.17 | ≤0.1 | Rest | ≤0.1 | ≤0.01 | 0.02-0.05 | 0.002-0.005 |
| σU, MPa | d5, % | y, % | HRC |
|---|---|---|---|
| σU, MPa | d5, % | y, % | HRC |
| The hot rolled gorjachekatannyj. Without heat treatment delivery condition | |||
| ≤620 | ≥25 | ≥55 | - |
| The hot rolled gorjachekatannyj. Heating for quenching to 900 °C, exposure for 1 h, cooling in oil at a temperature of 40-80 °C (cooling time 7-8 min., time of sample transfer from the furnace to the quenching tank is not more than 5 seconds) + holiday: temperatures up to 450 °C (aging 50 min, excluding the time of heating), air cooling (HRC hardness in the Central zone after quenching, after quenching with tempering) | |||
| ≤560 | ≥28 | ≥60 | ≥38/28 |
