4340 Steel Investment Castings

At Aero Metals, our precision 4340 alloy castings are manufactured with rigorous quality control processes, ensuring that each component is produced with unparalleled precision, durability, and reliability. Our 4340 steel castings are engineered for applications that demand exceptional toughness, high strength, and superior fatigue resistance, making them the go-to solution for aerospace, defense, automotive, and heavy industrial projects.

At Aero Metals, we work with you to produce precision 4340 steel castings manufactured to your project specifications. Check out our featured cast parts gallery for examples of our 4340 investment casting capabilities, or request a quote today.

4340 Steel Casting Advantages

4340 steel is a high-alloy, low-carbon steel that is alloyed with nickel, chromium, and molybdenum, offering a remarkable combination of toughness, strength, and wear resistance. Additional benefits include:

• Enhanced Strength & Durability
• Superior Toughness
• High Temperature & Extreme Stress Performance
• Enhanced Wear Resistance
• Cost-Effective

Not in the market for 4340 alloy castings? Check out our stainless steel investment casting options.

4340 Investment Casting Industries Served

Often used in applications where mechanical stress and extreme impact are part of everyday operations, 4340 steel castings are known for their ability to withstand heavy loads and maintain high tensile strength while performing consistently under cyclic fatigue. 4340 investment castings are commonly used in the following industries:

• Aerospace
• Military & Defense
• Firearms
• Security, Door & Lock Hardware
• Pumps & Valves
• Agriculture
• Automotive

4340 Steel Chemical Composition

4340 steel is a high-performance alloy known for its excellent strength, toughness, and fatigue resistance. Its chemical composition includes:

• Carbon (C): 0.38–0.43%
• Manganese (Mn): 0.60–0.80%
• Silicon (Si): 0.20–0.30%
• Chromium (Cr): 0.80–1.10%
• Nickel (Ni): 1.65–2.00%
• Molybdenum (Mo): 0.20–0.30%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.040%

Why Choose Aero Metals for Your 4340 Investment Casting Needs?

Aero Metals is your premier source for high-volume investment castings. With second-to-none customer service and world-renowned investment casting expertise, we look forward to working with you on your next complex metal investment casting project. Our results-driven expert team provides the following approach to your investment casting needs.

• Engineering centric with a metal casting focus
• Custom-designed tools built in-house
• Extensive experience with complex geometries and hard-to-manufacture parts
• Capable of handling high-volume investment casting production runs
• Numerous material options, including ferrous and non-ferrous alloys
• In-house CNC machining capabilities
• One-stop shop for investment castings and casting-based assemblies
• Guaranteed consistent quality

Let’s Get Started

Contact us for more information regarding your next 4340 alloy casting project, or request a quote today. Aero Metals is dedicated to delivering reliable investment cast parts from high-quality metals that provide outstanding benefits. With top-tier metal casting quality, testing, and inspection standards, Aero Metals is a trusted source for premium-grade precision 4340 investment casting services.