AISI 4340 Steel Bars

Product Description

We are a renowned supplier of AISI 4340 Alloy Steel Bar, which is heat treatable and low alloy steel, used in industries for various purpose. It has high strength and toughness in the heat treated condition.

Chemical Composition :-

• Iron : 95.195 to 96.33%
• Chromium : 0.700 to 0.900%
• Nickel : 1.65 to 2.00%
• Manganese : 0.600 to 0.800%
• Molybdenum : 0.200 to 0.300%
• Carbon : 0.370 to 0.430%
• Silicon : 0.150 to 0.300%
• Phosphorous : 0.0350%
• Sulfur : 0.0400%

Properties :-

• Melting Point : 1427C
• Density : 7.85 g/cm cube
• Tensile strength : 745 MPa
• Yield strength : 470 MPa
• Shear modulus : 80 GPa
• Bulk modulus : 140 GPa
• Elastic modulus : 190 to 210 GPa
• Poissons ratio : 0.27 to 0.30
• Reduction of area : 50%
• Elongation at break : 22%
• Thermal Expension : 12.3 um/mC
• Thermal conductivity : 44.5 W/mK

Applications :-

• Mainly used in powere transmission shafts and gears, aircraft landing gear etc

Exceptional Strength and Reliability

AISI 4340 Steel Bars are engineered to deliver superior performance in construction projects. Their high carbon content and advanced alloy composition provide outstanding strength, toughness, and resistance to fatigue. These qualities ensure structural integrity even under demanding conditions, making them a preferred choice for builders and engineers seeking long-lasting materials for foundational or load-bearing applications.


Wide Applications in Construction

These steel bars are frequently employed in various construction projects across India. Whether used in buildings, bridges, or industrial structures, AISI 4340s properties support critical infrastructure. Their substantial thickness and gray finish add reliability and subtle aesthetic appeal, further elevating their suitability for large-scale and high-stress environments.