Supreme Steels

Maraging 300

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:

Specifications:

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