1.7220
Alloy Steel1.7220
1.7220 supplied by Shanxi Youte Steel (jlhsteel.net).
Chemical Composition (%)
| C | 0.22 |
|---|---|
| CR | 0.9 |
| MO | 0.15 |
| MN | 0.55 |
Chinese Standard
DIN EN 10083
Equivalent Grades
25CrMo4 / AISI 4130
Available Forms
Bar, Plate, Tube, Forging, Wire
Uses
Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈1.05%) improves hardenability, wear and corrosion resistance. Molybdenum (≈0.225%) 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
Austenitize at 820–870 °C (oil or water quench depending on section) and temper at 400–650 °C to the required strength/toughness balance.
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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