Maraging 250
Products
Special Steels Division
Wire Division
Maraging 250 - High Strength, Low Carbon Steel Alloy
Maraging 250 is a high-strength, low-carbon steel alloy that is known for its exceptional mechanical properties, particularly its high tensile strength and toughness. The alloy is called “maraging” because it undergoes a special aging process (called maraging) to achieve superior hardness and strength. Maraging 250 is specifically designed for applications requiring high performance, such as in aerospace, tooling, and structural components. This alloy is famous for its ability to maintain outstanding mechanical properties at both ambient and elevated temperatures.
Maraging 250 contains nickel as its main alloying element, along with cobalt, molybdenum, and titanium, which contribute to its strength and resistance to stress corrosion cracking. Its high strength-to-weight ratio, combined with excellent toughness, makes it a popular choice in industries where both performance and reliability are crucial.
Features of Maraging 250:
- Exceptional Strength: Provides very high tensile strength, up to 250 ksi (1725 MPa), making it suitable for high-stress applications.
- Excellent Toughness: Maintains excellent toughness and ductility, even at high strength levels, which is crucial for applications requiring impact resistance.
- Good Fatigue Resistance: Withstands repeated loading and cyclic stress without significant degradation of properties.
- Good Corrosion Resistance: Offers resistance to various corrosive environments, including stress corrosion cracking.
- Low Carbon Content: The low carbon content minimizes the formation of carbides, which helps in achieving superior toughness.
- Heat Treatment: Maraging 250 can be heat-treated to achieve different hardness levels, offering flexibility in performance.
- Good Weldability: Can be welded easily, with minimal risk of cracking during the welding process.
Specifications:
- AMS 6514
- ASTM A647
- UNS K92600
Composition of Maraging 250:
Element | Percentage |
---|---|
Nickel (Ni) | 17.0-19.0% |
Cobalt (Co) | 8.0-10.0% |
Molybdenum (Mo) | 4.5-5.0% |
Titanium (Ti) | 0.7-1.0% |
Iron (Fe) | Balance |
Carbon (C) | 0.03% Max |
Manganese (Mn) | 0.80% Max |
Silicon (Si) | 0.30% Max |
Sulfur (S) | 0.01% Max |
Phosphorus (P) | 0.015% Max |
Physical Properties:
Property | Value |
---|---|
Density | 8.0 g/cm³ |
Melting Point | 1410-1450°C (2570-2642°F) |
Hardness (BHN) | 330-450 BHN |
Tensile Strength | 1725 MPa (250,000 psi) |
Yield Strength | 1550 MPa (225,000 psi) |
Elongation | 12-15% |
Reduction Area | 40% |
Modulus of Elasticity | 200 GPa |
Impact Toughness | 30-50 J (Room temperature) |
Thermal Conductivity | 19 W/m·K |
Coefficient of Thermal Expansion | 13.0 x 10^-6 /°C |