ZYTC Alloy supplies Maraging 300 (UNS K93120), an ultra-high-strength steel for aerospace & racing. Get exceptional toughness & easy machining. Request a quote for bars & billets today.
Delivery :
FOB
minimum order :
50 kilograms
Supply Ability :
5000kilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
add to cart
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Maraging 300 is an age-hardenable iron-nickel steel strengthened through intermetallic precipitation rather than carbon. With a nominal 18% nickel composition and cobalt-molybdenum additions, this grade delivers exceptional strength (exceeding 2000 MPa yield), high fracture toughness, and excellent resistance to crack propagation. Its simple heat treatment and minimal distortion during aging make it ideal for aerospace landing gear, autosport components, and high-performance tooling .
1. Product Specifications & Physical Data
ZYTC Alloy supplies Maraging 300 in mill forms for critical applications requiring verified mechanical properties and complete material traceability.
Available Forms: Bar stock (rounds and other profiles), forging billet, sheet, plate, and strip .
Specifications: AMS 6514, AMS 6521, ASTM A579, UNS K93120 .
Chemical Composition (Weight %)
Maraging 300 Specification
Nickel (Ni)
18.0 - 19.0
Cobalt (Co)
8.5 - 9.5
Molybdenum (Mo)
4.6 - 5.2
Titanium (Ti)
0.50 - 0.80
Aluminum (Al)
0.05 - 0.15
Carbon (C)
0.03 max.
Manganese (Mn)
0.10 max.
Silicon (Si)
0.10 max.
Phosphorus (P)
0.010 max.
Sulfur (S)
0.010 max.
Zirconium (Zr)
0.01 max.
Boron (B)
0.003 max.
Iron (Fe)
Balance (approx. 67%)
Physical Properties
Metric
Imperial
Density
8.00 - 8.03 g/cm³
0.289 - 0.290 lb/in³
Melting Point
1413°C
2575°F
Modulus of Elasticity
190 GPa
27,600 ksi
Poisson's Ratio
0.3
0.3
Shear Modulus
73 GPa
10,600 ksi
2. Fabrication & Material Comparison
Maraging 300 offers superior fabricability compared to conventional high-strength steels, with simple heat treatment and excellent dimensional stability.
Solution Annealing: 815°C (1500°F) × 1 hour, air cool; produces soft martensitic structure (30-35 HRC) for machining .
Aging: 482°C (900°F) × 3-6 hours, air cool; develops full strength (52-54 HRC) .
Hot Working: 955-1260°C (1750-2300°F); reheat as necessary; avoid working below 925°C .
Cold Working: Excellent formability in annealed condition; work-hardening rate low; can be cold rolled to 90% reduction .
Machining: Good machinability in solution-annealed condition (30-35 HRC); carbide tooling recommended .
Welding: Readily welded using GTAW, GMAW, electron beam, and resistance welding; matching filler metal recommended; post-weld aging restores full strength .
Contact ZYTC Alloy for certified Maraging 300 materials with complete traceability, AMS 6514 specifications, technical datasheets, and competitive pricing on standard sizes or custom-forged components.
