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Globus Metal Powders

GMP® M300™

Maraging Steel Powder for Ultra-High Strength and Toughness

GMP® M300™ from Globus Metal Powders is a premium maraging steel powder designed for exceptional strength, toughness, and dimensional stability. Produced via argon inert gas atomisation, this powder features ultra-low oxygen content, tightly controlled minor elements, and optimised spherical particle morphology, ensuring reliable densification and defect-free additive manufacturing or PM-HIP builds. 

GMP® M300™ is widely used in aerospace, defence, motorsport, and high-performance tooling, where components must withstand extreme mechanical loads, fatigue, and impact stress. Its low carbon maraging composition allows for precise ageing treatments, delivering ultra-high tensile strength while retaining excellent toughness. 

Differentiation

Across the GMP® portfolio: 

  • Versus nickel superalloys (GMP® 718™, GMP® 625™, GMP® Alloy X™, GMP® 939™): GMP® M300™ excels in room-temperature and moderate-temperature strength and toughness, while superalloys are selected for high-temperature creep, fatigue, and oxidation resistance.
  • Versus precipitation-hardening steels (GMP® 17-4PH™, GMP® 15-5PH™, GMP® 13-8Mo™): GMP® M300™ achieves higher ultimate tensile strength and fracture toughness due to its maraging characteristics, whereas PH stainless steels balance corrosion resistance with moderate strength.
  • Versus stainless steels (GMP® 316L™, F53, 415): GMP® M300™ provides ultra-high strength and toughness, whereas these stainless steels focus on corrosion resistance and moderate structural performance.
  • Versus ferritic-martensitic steels (P91, GMP® EUROFER97™): P91 and GMP® EUROFER97™ are selected for high-temperature structural stability, while GMP® M300™ prioritises mechanical performance at moderate temperatures and extreme load-bearing applications.

 

GMP® ultra-low oxygen powders and tightly controlled minor elements minimise oxide inclusions and internal voids, ensuring defect-free PM-HIP consolidation and additive manufacturing builds. Its spherical particle morphology and optimised PSD guarantee predictable flow, uniform packing, and consistent layer deposition, critical for high-performance components. 

Applications

  • Motorsport: high-stress gears, shafts, and performance-critical components. 
  • Tooling & Die Applications: high-toughness components exposed to cyclic loads and impact.  
  • Additive Manufacturing: defect-free builds with ultra-high strength and dimensional precision. 

Key Advantages

  • Ultra-high tensile strength and fracture toughness for critical structural applications. 
  • Consistent mechanical performance through controlled ageing treatments. 
  • Ultra-low oxygen and tightly controlled minor elements for defect-free consolidation. 
  • Spherical particle morphology and optimised PSD for predictable flow, packing, and layer deposition. 
  • Internal laboratory verification ensures chemistry, PSD, and density consistency. 
  • Customisable powders tailored for PM-HIP, AM, MIM, and high-performance tooling applications. 
Aerospace & Defence
Automotive
Industrial / Engineering
Oil & Gas
Grade Process PSD (min) PSD (max) Data sheets Stock Status Part No Request a Quote
GMP® M300™ LPBF 15 45 PDF 0001374
20 53 PDF 0001377
EBM 45 106 PDF 0001369
DED 45 150 PDF 0001371
PM-HIP 0 300 PDF 0001373
MIM 0 20 PDF 0001372
Request a custom specification

Alternative Metal Powders

GMP® P92™

GMP® P92™ from Globus Metal Powders is a chromium-molybdenum ferritic-martensitic steel powder engineered for exceptional high-temperature strength, creep resistance, and thermal stability.

GMP® 939™

GMP® 939™ from Globus Metal Powders is a nickel-chromium-cobalt superalloy powder designed for maximum high-temperature creep resistance, stress rupture strength, and fatigue performance.

GMP® 02-833™

GMP® 02-833™ from Globus Metal Powders is a premium nickel-aluminium bronze (NiAl Bronze) powder engineered for superior corrosion resistance, mechanical strength, and wear performance in marine and industrial environments.

GMP® SA508™

GMP SA508™ from Globus Metal Powders is a low-alloy steel powder optimised for high-strength, fracture-resistant components, particularly in pressure vessel and critical structural applications.

GMP® 300M™

GMP® 300M™ from Globus Metal Powders is a high-strength, low-alloy steel powder optimised for critical aerospace, defence, and high-performance structural components.

GMP® M300™

GMP® M300™ from Globus Metal Powders is a premium maraging steel powder designed for exceptional strength, toughness, and dimensional stability.

GMP® Alloy X™

GMP® Alloy X™ from Globus Metal Powders is a nickel-chromium-cobalt superalloy powder engineered for exceptional high-temperature strength, oxidation resistance, and thermal stability.

GMP® 13-8Mo™

GMP® 13-8Mo™ from Globus Metal Powders is a martensitic precipitation-hardening stainless steel powder optimised for exceptional mechanical strength, toughness, and corrosion resistance, particularly in structural, aerospace, and defence applications.

GMP® 15-5PH™

GMP® 15-5PH™ from Globus Metal Powders is a martensitic precipitation-hardening stainless steel powder engineered for excellent mechanical strength, toughness, and corrosion resistance, with enhanced manufacturability for PM-HIP and additive manufacturing processes.

START YOUR NEXT PROJECT WITH CONFIDENCE

Whether you require ultra-low oxygen grades, bespoke particle size distributions or high-volume supply, our team is ready to support your requirements. 

Speak to our specialists today to discuss your application or request a quotation.

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