Project Description
Maraging 300 (UNS K93120)
Maraging 300 (UNS K93120) is an 18% nickel, cobalt strengthened steel (C-type) with excellent properties, workability and heat treatment characteristics. Maraging material is supplied in the annealed and descaled condition. The alloy is very tough, relatively soft (RC 30/35), readily machined or formed. Maraging provides a high value for critical parts in aerospace, structural, component and tooling applications.
Equivalent Grades
Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
Maraging 300 C300 | – | – | – | K93120 | – | – | – | – | – | – |
Chemical Composition, %
Alloy | C | Si | Mn | P | S | Cr | Ni | Co | Mo | Al | Ti | Cu | Fe |
Maraging 300 | ≤0.03 | ≤0.10 | ≤0.10 | ≤0.01 | ≤0.01 | ≤0.50 | 18.0-19.0 | 8.5-9.5 | 4.6-5.2 | 0.05-0.15 | 0.5-0.8 | ≤0.50 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed+Aged)
Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
8.0 | 1350-1450 | 2035 | 2000 | 12 | / |
Available Products and Specifications
Rod, Bar, Wire and Forgings | ASTM A 538, AMS 6514 |
Plate, Sheet and Strip | – |
Pipe and Tube | – |
Welding Product | – |
Others | – |
Features
Maraging 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
Applications
Commercial applications for this engineering material include:
- Missile casings
- Tooling
- Ordnance mounting blocks
- High performance
- Autosport components
- CouplingsJet engine and helicopter drive shafts
- Load cells