25Cr2Ni2MoV

Alloy Steel

25Cr2Ni2MoV

Chinese GB high-strength Ni-Cr-Mo-V steel for rotors.

Chemical Composition (%)

C0.22
SI0.17
MN0.4
CR1.7
NI1.8
MO0.4
V0.05
P0.025
S0.025

Applications

High-end / niche grade used in aerospace, defense, tooling, bearing, gear or heavy shaft applications.

Available Forms

Bar, plate, sheet, tube, forgings, strip, wire, powder

Uses

Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈1.9%) improves hardenability, wear and corrosion resistance. Molybdenum (≈0.5%) raises high-temperature strength and prevents temper embrittlement. Nickel (≈2%) increases toughness and impact strength at low temperature. Vanadium (≈0.1%) refines grain and strengthens the tempered structure. 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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