Dongguan VIM Steel Co.,Ltd.

The 40CrNiMo alloy steel plate is a premium medium-carbon, low-alloy structural steel renowned for its exceptional deep-hardenability, high tensile strength, and superior toughness. Containing approximately 0.4% carbon and enriched with chromium, nickel, and molybdenum, this alloy is specifically engineered to maintain high mechanical properties across large cross-sections. In its standard quenched and tempered (Q+T) condition, 40CrNiMo provides an elite balance of fatigue resistance and impact strength, making it the definitive choice for the world's most demanding heavy-duty mechanical applications.

Our 40CrNiMo steel plates are critical components in the manufacturing of high-stress parts such as heavy-duty gears, crankshafts, turbine shafts, and structural aerospace components. Its molybdenum content prevents temper brittleness, while nickel ensures excellent low-temperature toughness. Whether you are building high-speed transmission systems or large-scale mining machinery, this high-strength alloy steel delivers the structural integrity required to withstand extreme torsional and vibratory loads.

Key Performance Benefits
Deep Hardenability: Maintains uniform strength and hardness from the surface to the core, even in ultra-thick plates.

Superior Fatigue Resistance: Optimized for components subject to repetitive stress cycles and high-vibration environments.

Exceptional Toughness: High impact energy absorption, even at sub-zero temperatures, due to refined nickel alloying.

Thermal Stability: Molybdenum addition enhances resistance to softening at elevated temperatures and prevents temper embrittlement.

Precision Machinability: Excellent response to CNC machining after the annealing or tempering process.

Heavy-Duty Reliability: Ideal for large-section parts where standard carbon steels fail to meet safety and performance margins.