18NiC300, Maraging 300, C300, 3J33, martensitic aging steel mold steel belongs to low-carbon martensitic aging hardening plastic mold steel. The alloy elements that play an aging hardening role in the steel are titanium, aluminum, cobalt, and molybdenum. The mass fraction of carbon is relatively low (about 0.03%), with the aim of improving the toughness of steel. Impurities have a significant impact on the properties of martensitic age hardening steel, with a more significant impact on steel with higher yield strength. This requires this type of steel to undergo vacuum melting Reduce impurities, segregation, and gas content in steel ingots to ensure good toughness and fatigue resistance of the steel.

C300 Maraging steel is traditionally very costly and metallurgically advanced, strengthened by martensite and intermetallic precipitation.

Maraging Steel 300 Bar Chemical Compositions

C ≤ 0.03

TI 0.5-0.8

Mn ≤ 0.10

P ≤ 0.01

S ≤ 0.01

CO 8.5-9.5

Mo 4.6-5.2

NI 18.0-19.0

Maraging 300 Alloy Steels Material Properties

Due to its low carbon content, Maraging steel 300 provides good machinability and the ability to be cold-rolled up to 90% without cracking. This material also provides excellent weldability when aged following treatment to the heat-affected zone. Additionally, Maraging 300 Alloy Steels meet the following specifications:

• AMS 6514
• ASTM A 538
• MIL-S-46850D
• UNS K 93120

Maraging 300 Alloy Steels Features

Huitai Special Metals' Vascomax 300 is a nickel/cobalt steel alloy that is essentially carbon-free, other alloying elements include moly, aluminum and titanium. This combination creates a superior maraging steel that maintains numerous beneficial features, including:

• Extremely tough
• Relatively soft
• Maintains high strength & toughness
• Ultrahigh tensile strength
• Resists corrosion & crack propagation
• Excellent cleanliness & polishability
• Readily weldable

 

Maraging 300 Alloy Steels Material Applications

Maraging steel's strength and malleability in the pre-aged stage allows it to be more easily than other steels, reducing weight for a given strength. Maraging 300 also maintains very stable properties and will only soften slightly when overaged due to excessive temperature reception. This material also has an excellent strength-to-weight ratio so it can be used for numerous defense and military purposes. Some of the applications that Maraging C300 is generally used for, include:

• Missile & rocket motor cases
• Munitions
• Landing gear components
• Aerospace
• Extrusion tooling
• Die casting
• High performance shafting, gears & fasteners