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18Ni300 Maraging Steel Plate: High Strength from China Manufacturer
18Ni300 Maraging Steel Plate is an ultra-high-strength, low-carbon alloy designed for top-tier toughness and precision. With 18% nickel and a unique aging process, this Hot Rolled or Cold Rolled plate excels in aerospace, tooling, and defense applications, offering strength without sacrificing ductility.
Price: Contact Us for a Custom Quote
Need pricing for 18Ni300 Maraging Steel Plate? Contact us at sales for a tailored quote. Our Cold-Rolled and Hot-Rolled options deliver exceptional value for high-performance needs.
Specifications of 18Ni300 Maraging Steel Plate
Our Steel Plate comes in various configurations:
- Standards: ASTM A579, EN 1.2709, UNS K93120
- Thickness: 0.1″ – 4″ (2.5 mm – 101.6 mm)
- Width: Up to 48″ (1219 mm)
- Length: Customizable, up to 144″ (3658 mm)
- Surface Finish: Hot Rolled, Cold Rolled, or polished
Key Features (Advantages)
- Superior strength (up to 2060 MPa post-aging)
- Excellent toughness and ductility
- Minimal distortion during heat treatment
- Good weldability and machinability
- High resistance to cracking
Applications
- Aerospace: Rocket casings, landing gear
- Tooling: Die casting molds, extrusion tools
- Defense: Missile components, shafts
- Automotive: High-performance gears
- Energy: Turbine parts
Chemical Composition of 18Ni300 Maraging Steel
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 17.0 - 19.0 |
| Cobalt (Co) | 8.0 - 12.0 |
| Molybdenum (Mo) | 3.0 - 5.0 |
| Titanium (Ti) | 0.6 - 1.2 |
| Iron (Fe) | Balance |
| Carbon (C) | ≤ 0.03 |
| Silicon (Si) | ≤ 0.1 |
Mechanical Properties
| Property | Value (Aged) |
|---|---|
| Tensile Strength | 1900 - 2060 MPa |
| Yield Strength | 1860 - 2000 MPa |
| Elongation | ≥ 6% |
| Hardness (HB) | 550 - 600 |
Chemical Properties
18Ni300 Maraging Steel Sheet offers moderate resistance to acids and alkalis in mild conditions but struggles in highly oxidizing environments like nitric acid. Its low carbon content enhances toughness over corrosion resistance.
Things to Note (Limitations)
- Weakens above 480°C (900°F)
- Moderate corrosion resistance; not ideal for acidic extremes
- High cost due to nickel and cobalt
- Requires aging post-welding to restore strength
Corrosion Data
| Environment | Corrosion Rate (mm/year) | Test Conditions | Factors Affecting Corrosion |
|---|---|---|---|
| Atmospheric (Air) | 0.02 – 0.05 | Ambient humidity, 20-25°C | Surface finish, exposure time |
| Seawater (3.5% NaCl) | 0.1 – 0.2 | 25°C, aerated, as-built condition | Build orientation, heat treatment |
| Sulfuric Acid (10%) | 0.3 – 0.5 | 25°C, de-aerated, aged condition | Pore size, heat treatment |
| Hydrochloric Acid (1M) | 0.5 – 0.8 | 25°C, with 1 mM Hâ‚‚S, COâ‚‚ saturated | Austenite reversion, aging temperature |
| Nitric Acid (10%) | 0.8 – 1.2 | 25°C, oxidizing environment | Lack of Cr, heat treatment |
Welding and Manufacturing Tips
Welding 18Ni300 Maraging Steel Sheet is efficient:
- Welding: TIG with matching fillers; age post-weld at 480-500°C for 3 hours.
- Forming: Cold Drawn or Hot Rolled options; anneal at 820°C before shaping.
- Machining: Sharp tools, low speeds—18Ni300 Steel Plate is machinable pre-aging.
Customer Reviews
Frequently Asked Questions
Q: How does 18Ni300 Maraging Steel compare to stainless steel?
A: 18Ni300 Maraging Steel offers far higher strength (up to 2060 MPa) and toughness than stainless steel, though it’s less corrosion-resistant—perfect for structural precision over rust-proofing.
Q: What’s the best use for Hot Rolled Steel Plate?
A: Aerospace and tooling—think rocket parts or extrusion dies. Our factory in China supplies Hot Rolled plates optimized for these high-stakes applications.
Q: Is 18Ni300 Maraging Steel better than titanium?
A: 18Ni300 Maraging Steel provides superior strength (2060 MPa vs. 1100 MPa) and easier machining than titanium, but it’s heavier and less corrosion-resistant—ideal for strength-focused uses.
Q: Can Cold Rolled Maraging Steel handle high temperatures?
A: Yes, up to 480°C—beyond that, 18Ni300 Steel loses strength, so it’s best for moderate heat scenarios.
Q: How weldable is 18Ni300 Maraging Steel Sheet?
A: Very weldable with TIG and matching fillers—age post-weld at 480°C to restore the Cold Drawn 18Ni300 Maraging Steel Sheet’s full strength.