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18Ni350 Maraging Steel Plate –Premium Quality From A Trusted Manufacturer
18Ni350 Maraging Steel Plate is an ultra-high-strength, low-carbon alloy fortified with 18% nickel and cobalt, designed for top-tier toughness and minimal distortion. With a tensile strength reaching ~2413 MPa after aging, this Hot-Rolled plate is a powerhouse in aerospace, defense, and tooling, offering unmatched reliability for critical applications.
Price: Contact Us for a Custom Quote
Looking for 18Ni350 Maraging Steel Plate pricing? Contact us at sales for a custom quote. Our Cold-Rolled and Hot-Rolled options deliver premium performance at competitive rates.
Specifications
- Standards: AMS 6515, UNS K93160, W.Nr. 1.6355
- 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)
- Exceptional strength (2413 MPa post-aging)
- High toughness and ductility
- Minimal shrinkage during heat treatment (~0.05%)
- Excellent weldability and machinability
- Superior fatigue resistance
Applications
- Aerospace: Rocket motor casings, landing gear
- Defense: Missile bodies, armor plating
- Tooling: High-pressure dies, molds
- Energy: Turbine components
- Motorsports: Structural panels
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 17.0 - 19.0 |
| Cobalt (Co) | 11.5 - 12.5 |
| Molybdenum (Mo) | 4.6 - 5.2 |
| Titanium (Ti) | 1.3 - 1.6 |
| Aluminum (Al) | 0.05 - 0.15 |
| Iron (Fe) | Balance |
| Carbon (C) | ≤ 0.03 |
Mechanical Properties
| Property | Value (Aged) |
|---|---|
| Tensile Strength | 2350 - 2413 MPa |
| Yield Strength | 2300 - 2380 MPa |
| Elongation | ≥ 7% |
| Hardness (HB) | 600 - 650 |
Chemical Properties
18Ni350 Maraging Steel Plate offers moderate resistance to mild acids and alkalis in reducing conditions but struggles in oxidizing environments like nitric acid due to low chromium content. It’s engineered for strength, not corrosion resistance.
Things to Note (Limitations)
- Strength drops above 450°C (842°F)
- Limited corrosion resistance in harsh acids
- Higher cost due to nickel and cobalt content
- Requires post-weld aging for optimal properties
Corrosion Data for 18Ni350 Maraging Steel
| Environment | Corrosion Rate (mm/year) | Test Conditions | Factors Affecting Corrosion |
|---|---|---|---|
| Atmospheric (Air) | 0.02 – 0.05 | Ambient, 20-25°C, 50% humidity | Humidity, surface finish |
| Seawater (3.5% NaCl) | 0.1 – 0.2 | 25°C, aerated, aged condition | Heat treatment, exposure duration |
| Sulfuric Acid (10%) | 0.3 – 0.5 | 25°C, de-aerated, aged condition | Concentration, aeration |
| Hydrochloric Acid (1M) | 0.5 – 0.8 | 25°C, de-aerated, aged condition | Acid strength, aging temperature |
| Nitric Acid (10%) | 0.8 – 1.2 | 25°C, oxidizing environment | Low Cr content, oxidizing agents |
| Caustic Soda (10%) | 0.05 – 0.1 | 25°C, de-aerated | Temperature, concentration |
Welding and Manufacturing Tips
Welding 18Ni350 Maraging Steel Plate is efficient:
- Welding: TIG with matching fillers; age at 480-500°C for 3-6 hours post-weld.
- Forming: Anneal at 815°C before shaping Cold Rolled or Hot Rolled plates.
- Machining: Use sharp tools, low speeds—pre-aging enhances machinability.
Customer Reviews
Frequently Asked Questions
Q: How does 18Ni350 Maraging Steel compare to stainless steel?
A: 18Ni350 Maraging Steel offers much higher strength (up to 2413 MPa) and toughness than stainless steel, though it’s less corrosion-resistant—ideal for structural precision over rust-proofing.
Q: What’s the best use for Hot Rolled 18Ni350 Plate?
A: Aerospace and tooling—perfect for rocket casings and dies. Our factory in China supplies Hot Rolled plates optimized for these high-stakes applications.
Q: Is 18Ni350 Maraging Steel better than titanium?
A: 18Ni350 Steel delivers superior strength (2413 MPa vs. 1100 MPa) and easier machining than titanium, but it’s heavier and less corrosion-resistant—great for strength-driven needs.
Q: Can Cold Rolled Steel Plate handle high temperatures?
A: Yes, up to 450°C—beyond that, 18Ni350 Steel Plate weakens, so it’s best for moderate heat environments.
Q: How weldable is Cold Drawn Maraging Steel Plate?
A: Very weldable with TIG and matching fillers—age post-weld at 480°C to restore full strength.