Maraging 300

Maraging 300 Chemical Composition

%	C	Si	Mn	S	P	Co	Ni	Mo	Ti	Al	Fe
Min	–	–	–	–	–	8	18	4.6	0.55	0.05	–
Max	0.03	0.1	0.1	0.01	0.01	9.5	19	5.2	0.8	0.15	balance

Maraging 300 Physical Properties

Density	Melting range	Modulus of Elasticity	Average Co of Thermal Expansion
8.0 g/cm	1412.8	27.5 x 10-6 psi	5.6 x 10-6 in/in/°F

Maraging 300 Heat Treatment / Aging:

Maraging alloys are essentially carbon-free, a protective atmosphere is not required during annealing or aging. Material is supplied in the solution annealed condition with a hardness of 30/35 Rc. Typical heat treat time/temperature are listed below. Large cross sections should be aged for longer periods.

NOTE: A modified aging cycle is suggested for die casting applications for increased die life. The following thermal treatments have been used to obtain desirable characteristics for die casters. Following the rough machining of the die, anneal at 1500-1525 ºF for 1 hour per inch of thickness is typical. After finish machining, an aging heat treatment of 980-1000 ºF for 6 hours is typical.

Temperature	Time	Resulting Hardness
900/925 °F	6 hrs	50/55 Rc

Features:

• Ultra-High Strength: Maraging 300 steel (UNS K93120) is an age-hardenable iron-nickel alloy steel with extremely high tensile strength.
• Good Toughness: Despite its high strength, the alloy maintains good toughness, suitable for applications requiring both strength and reliability.
• Ease of Machining: In its pre-aged condition, Maraging 300 steel is readily machinable, facilitating the manufacturing of complex-shaped parts.
• Excellent Transverse Properties: The alloy exhibits excellent transverse properties and resistance to crack propagation, ensuring reliability under various stress conditions.

Applications:

• Oil and Gas Industry: Maraging 300 steel is utilized in the oil and gas sector for manufacturing high-strength, corrosion-resistant equipment components, such as drill rods and pump shafts, to withstand harsh extraction environments.
• Aerospace: The alloy is widely used in the aerospace industry for manufacturing aircraft structural components and engine parts, providing necessary strength and toughness.
• Mold Manufacturing: Maraging 300 steel is commonly used in manufacturing high-precision molds, such as injection molds and die-casting molds, ensuring durability and precision.