25ХГМ
Alloy Steel25ХГМ
Russian GOST Cr-Mn-Mo steel.
Chemical Composition (%)
| C | 0.22 |
|---|---|
| SI | 0.17 |
| MN | 0.9 |
| CR | 1 |
| MO | 0.2 |
| P | 0.03 |
| S | 0.03 |
Applications
International high-end steel grade for aerospace, oil & gas, defense or engineering machinery.
Available Forms
Bar, plate, sheet, tube, forgings, strip, wire, powder
Uses
Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈1.15%) improves hardenability, wear and corrosion resistance. Molybdenum (≈0.25%) raises high-temperature strength and prevents temper embrittlement. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.
Heat Treatment
Typically normalized (880–920 °C, air cool) or carburized (900–930 °C) for case-hardening grades, then quenched and tempered at 150–200 °C.
Precautions
Weldable with standard procedures; preheat may be needed for thick sections or higher-carbon/ alloy grades. Protect from decarburization during heating (controlled atmosphere or protective coating).
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