Maraging 300
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Maraging 300 - High-Strength, Low-Carbon Steel Alloy
Maraging 300 is a high-performance, low-carbon steel alloy designed for applications requiring exceptional strength, toughness, and resistance to fatigue. It is part of the maraging steel family, which undergoes an aging process that imparts high strength through the precipitation of intermetallic compounds. Maraging 300 is commonly used in industries that demand high strength, including aerospace, defense, and tooling. With its high tensile strength, excellent toughness, and superior machinability, Maraging 300 is a go-to material for manufacturing components exposed to extreme mechanical stress.
This alloy is known for its excellent resistance to cracking, corrosion, and wear, making it ideal for high-stress and high-performance applications. It combines a low carbon content with nickel, cobalt, and molybdenum to enhance its mechanical properties, including creep resistance, which makes it suitable for high-temperature environments.
Features of Maraging 300:
- High Tensile Strength: Maraging 300 offers a tensile strength of up to 300 ksi (2068 MPa), making it one of the highest-strength steels available.
- Excellent Toughness: Retains good toughness even at high strength levels, ensuring resistance to brittleness or cracking.
- Good Fatigue Resistance: Withstands cyclic loading and is resistant to fatigue failure, ideal for applications with repeated mechanical stresses.
- Superior Weldability: This alloy can be welded with minimal risk of cracking, enabling flexibility in fabrication and assembly.
- Corrosion Resistance: Maraging 300 exhibits resistance to corrosion and stress corrosion cracking, which enhances its performance in harsh environments.
- Outstanding Machinability: The alloy’s properties allow for excellent machinability, making it ideal for precision parts and tooling.
- High Wear Resistance: Due to its hardness, it resists wear and abrasion, making it suitable for tooling and industrial applications.
- Heat Resistance: While it maintains its strength at elevated temperatures, it offers excellent stability in applications requiring high temperature and stress.
Specifications:
- AMS 6516
- ASTM A647
- UNS K93100
- ASME SB-647
- MIL-S-46850
These specifications reflect Maraging 300’s compatibility with industries that require high-strength, low-alloy steel capable of handling extreme conditions.
Composition of Maraging 300:
Element | Percentage |
---|---|
Nickel (Ni) | 17.0-19.0% |
Cobalt (Co) | 8.0-10.0% |
Molybdenum (Mo) | 4.5-5.0% |
Titanium (Ti) | 0.8-1.0% |
Iron (Fe) | Balance |
Carbon (C) | 0.03% Max |
Manganese (Mn) | 0.50% Max |
Silicon (Si) | 0.50% 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) | 350-450 BHN |
Tensile Strength | 2068 MPa (300,000 psi) |
Yield Strength | 1850 MPa (270,000 psi) |
Elongation | 10-15% |
Reduction Area | 35-40% |
Modulus of Elasticity | 200 GPa |
Impact Toughness | 30-50 J (at room temp) |
Thermal Conductivity | 19 W/m·K |
Coefficient of Thermal Expansion | 13.0 x 10^-6 /°C |