Steel 25X13H2
25Cr13Ni2 Steel
Steel 25Cr13N2: Handbook of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperature, physical, mechanical, technological and foundry properties for the grade — Steel 25Cr13N2.
General information on steel 25Cr13N2
| Type of delivery |
| Round 25х13Н2, ground rod 25х13Н2 GOST 18907−73, TU 14−1-721−73. |
| Application |
| Parts with high ductility, shock loads (valves of hydraulic presses, household items), as well as products exposed to slightly aggressive media (precipitation, aqueous solutions of salts of organic acids at room temperature, etc.). Steel is corrosion-resistant martensitic class. |
Chemical composition of steel 25Х13Н2
| Chemical element | % |
| Silicon (Si), not more | 0.5 |
| Manganese (Mn) | 0.8−1.2 |
| Copper (Cu), not more than | 0.30 |
| Nickel (Ni) | 1.5−2.0 |
| Sulfur (S) | 0.15−0.25 |
| Titanium (Ti), not more than | 0.2 |
| Carbon (C) | 0.2−0.3 |
| Phosphorus (P) | 0.08−0.15 |
| Chrome (Cr) | 12.0−14.0 |
Mechanical properties of steel 25Cr13Ni2
Mechanical properties depending on tempering temperature
| t tempering temperature, °C | σB, MPa | δ5, % | HRCe | |||||||||||
| Hardening 1030−1050°C, air. | ||||||||||||||
| 200 | 1620 | 3 | 55 | |||||||||||
| 300 | 1590 | 7 | 54 | |||||||||||
| 400 | 1530 | 3 | 53 | |||||||||||
| 500 | 1470 | 3 | 51 | |||||||||||
| 600 | 1220 | 6 | 39 | |||||||||||
| 700 | 730 | 9 | 30 | |||||||||||
| 800 | 710 | 9 | 27 | |||||||||||
Mechanical properties of the bar
| Heat treatment, delivery condition | Section, mm | σB, MPa | δ5, % | HRCe |
| Grinding rods machined to the specified strength | 1−30 | 690−980 | ||
| Annealed bars | >5 | |||
| Annealed | 830 | 10 | 25−27 |
Technological properties of steel 25Cr13Ni2
| Forging temperature |
| The beginning 1150, the end 800. Cooling is carried out slowly in furnaces. |
Physical properties of steel 25Cr13Ni2
| Test temperature, °С | 20 | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |
| Steel density, pn, kg/m3 | 7680 | |||||||||
| Thermal conductivity coefficient W/(m — °C) | 18 | 19 | 20 | 22 | 24 | |||||
| Test temperature,°C | 20−100 | 20−200 | 20−300 | 20−400 | 20−500 | 20−600 | 20−700 | 20−800 | 20−900 | 20−1000 |
| Coefficient of linear expansion (a, 10−6 1/°C) | 11.6 | 12.0 | 12.4 | 12.8 |
