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Home > Metallurgy, Mineral & Energy > Alloy > Other Alloys > Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness thumbnail-3

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness thumbnail-4

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness thumbnail-5

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness photo-1

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness photo-2

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness photo-3

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness photo-4

Maraging 300 Ultra-High Strength Steel Bar/Plate/Tube/Strip/Welding Wire, Spot Stock & Custom, ASTM Standard, High Toughness photo-5

Product Spotlights

We supply various forms including round bar, pipe, plate, strip and welding wire. Customized specifications are available. Factory direct, fast delivery, complete MTC and ISO certification. In Stock & Fast Delivery Customized sizes & cut to size available

US$ 30 - 80 MOQ: 10 Kilograms

Key Specifications

Get Latest Price

Material:

Other, AerMet alloy

Shape:

Other, Sheet, bar, wire, tube, and strip

Color:

Black

Contact Supplier Request Quote Chat Now

Shanghai Globo Alloy Material Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

Shanghai Port

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Material Other, AerMet alloy

Shape Other, Sheet, bar, wire, tube, and strip

Color Black

Surface Treatment Other

Origin ShangHai

Maraging 300 is a premium-grade, low-carbon, precipitation-hardening maraging steel renowned for its exceptional combination of ultra-high tensile strength, excellent toughness, and outstanding dimensional stability. Representing one of the most advanced high-performance alloys in industrial and aerospace applications, it achieves its superior mechanical properties not from high carbon content but from nanoscale intermetallic precipitates formed during controlled aging heat treatment. This unique hardening mechanism allows the material to maintain remarkable ductility and fracture resistance even at peak strength levels.

Chemically, Maraging 300 is characterized by an ultra-low carbon composition, typically less than 0.03%, which eliminates brittle carbide formation and greatly improves weldability and toughness. Key alloying elements include approximately 18% nickel, 9% cobalt, 5% molybdenum, and small additions of titanium and aluminum. These elements contribute to the precipitation of strengthening phases such as Ni₃Mo and Ni₃Ti during aging, resulting in a highly uniform and stable microstructure. The alloy is commonly produced through vacuum induction melting (VIM) followed by vacuum arc remelting (VAR) to ensure high purity, low inclusion content, and consistent mechanical performance.

In the solution-annealed condition, Maraging 300 is relatively soft, around 30–34 HRC, making it highly machinable, formable, and easy to fabricate into complex shapes. After solution treatment at around 820°C followed by air cooling and aging at approximately 480°C for three to six hours, the alloy reaches its full mechanical potential. It delivers a minimum tensile strength of 300 ksi (around 2068 MPa), yield strength above 260 ksi (1793 MPa), hardness of 54–56 HRC, and respectable elongation and fracture toughness. This places it among the strongest commercially available wrought steels while retaining better toughness than many similarly strong carbon and low-alloy steels.

Product Tags: Maraging 300 , 18Ni300 , UNS K93120