Maraging Steel 250/C250, 300/C300, 350/C350 Bars and Forgings

Specification	Value
Standard	Maraging Steel 250/C250, 300/C300, 350/C350 Bars and Forgings
Related Standard	Steel Maraging, Bars, Forgings, Tubing, and Rings 18Ni-7.8Co-4.9Mo-0.40Ti-0.10Al Consumable Electrode Melted, Annealed AMS6512
	Steel Maraging, Bars, Forgings, Tubing, and Rings 18.5Ni-9.0Co-4.9Mo-0.65Ti-0.10Al Consumable Electrode Melted, Annealed AMS6514
	Steel, Maraging, Bars, Forgings, Tubing, and Rings 18.5Ni-12.0Co-4.9Mo-1.40Ti-0.10Al Double Vacuum Melted, Annealed AMS6515
Grade	Maraging Steel 250/C250, 300/C300, 350/C350
Type	Bars, Forgings, Rings
Dimension	Diameter: ¼” – 10″ (6.35 – 254mm)
Density	8.02 g/cm³
Inspection Certificate	EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection)
Tests	Chemical Composition, Mechanical Properties

Key Features

High Strength: Maraging steels (C250, C300, C350) are known for their exceptional strength, with tensile strengths ranging from 1800 MPa (C250) to 2400 MPa (C350). This makes them ideal for high-stress applications.
Excellent Toughness: Despite their high strength, these steels maintain good toughness and ductility, even at high strength levels. This is a key advantage over other high-strength steels.
Low Carbon Content: Maraging steels have very low carbon content, which enhances their weldability and reduces the risk of cracking during fabrication.
Precipitation Hardening: These steels gain their strength through a precipitation hardening process (aging), which involves heating the material to moderate temperatures (480°C–500°C) to form intermetallic compounds.
Good Machinability in Annealed Condition: In the annealed (soft) condition, maraging steels are relatively easy to machine, allowing for complex shapes to be formed before final aging.
High Fracture Toughness: Maraging steels exhibit high fracture toughness, making them suitable for critical applications such as aerospace components and tooling.
Corrosion Resistance: While not as corrosion-resistant as stainless steels, maraging steels offer moderate corrosion resistance, which can be improved with surface treatments.
Dimensional Stability: These steels show minimal distortion during heat treatment, ensuring dimensional stability in precision components.

Packing

Packed in plywood boxes.

Applications

1. Aerospace and Defense:

Rocket Motor Casings: Maraging steels are used in solid rocket motor casings due to their high strength-to-weight ratio and ability to withstand extreme pressures.
Landing Gear Components: Their high strength and toughness make them ideal for critical aircraft landing gear parts.
Missile and Defense Systems: Used in components requiring high strength and reliability under extreme conditions.

2. Tooling and Molds:

Injection Molds: Maraging steels are used for plastic injection molds due to their excellent machinability in the annealed state and high strength after aging.
Die-Casting Dies: Their resistance to thermal fatigue and wear makes them suitable for die-casting applications.
Extrusion Dies: Used in high-pressure extrusion processes for metals and plastics.

3. High-Performance Engineering:

Shafts and Gears: Maraging steels are used in high-stress rotating components, such as turbine shafts and gears, where strength and fatigue resistance are critical.
Fasteners: The material’s combination of strength and toughness benefits high-strength bolts, nuts, and other fasteners.
Springs and Mechanical Components: Used in applications requiring high elastic limits and durability.

4. Marine and Offshore:

Submarine Components: Maraging steels are used in submarine hulls and other underwater applications due to their strength and corrosion resistance.
Offshore Drilling Equipment: Suitable for high-stress components in drilling rigs and platforms.

5. Medical and Surgical Instruments:

Surgical Tools: Maraging steels are used in high-precision surgical instruments due to their strength, corrosion resistance, and ability to maintain sharp edges.
Orthopedic Implants: Their biocompatibility and strength make them suitable for certain medical implants.

6. Sporting Goods:

High-Performance Bicycle Components: Used in frames and components requiring lightweight and high strength.
Golf Clubs and Tennis Rackets: Maraging steels are used in high-end sporting equipment for their strength and durability.

7. Nuclear and High-Temperature Applications:

Nuclear Reactor Components: Maraging steels are used in components requiring high strength and resistance to radiation damage.
High-Temperature Fasteners: Suitable for applications where materials must retain strength at elevated temperatures.

8. Custom and Specialized Applications:

Prototype Development: Used in experimental and custom engineering projects requiring high strength and reliability.
High-Stress Test Equipment: Maraging steels are used in fixtures and components to test high-stress materials.

Grade-Specific Applications:

C250 (250 ksi): Commonly used in aerospace components, tooling, and general high-strength applications.
C300 (300 ksi): Preferred for more demanding applications such as rocket motor casings and high-stress tooling.
C350 (350 ksi): Used in the most critical applications, including defense systems and high-performance engineering components.