AISI 4330V

AISI 4330V is a low-alloy steel known for its high strength and toughness, often used in critical applications such as aerospace and automotive components. This alloy contains approximately 0.30% carbon, 0.80% chromium, 1.50% nickel, and 0.15% vanadium, which enhances its hardenability and fatigue resistance. The addition of vanadium contributes to improved wear resistance and overall performance in high-stress environments. AISI 4330V is commonly employed in manufacturing gears, shafts, and structural components that require excellent mechanical properties and reliability. Its ability to withstand extreme conditions makes it a preferred choice in demanding industries.


Low alloy steel typically containing 0.3% Carbon and alloyed with 0.9% Chromium, 1.8% Nickel and 0.5% Molybdenum to give enhanced mechanical properties and higher strength.

Often used in place of 4140/4145 due to its higher strength levels and improved impact properties at high strength.

Impact toughness is generally good to temperatures as low as -46°C with typically 27J average and 20J single achieved, this is limited though dependent on a number of factors such as ruling section, chemical composition and heat treatment condition, with impact toughness achieved decreasing with higher strength, increased ruling section and at lower test temperatures due to the materials Ductile / Brittle transition temperature.

Equivalent/Similar Standards