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18Ni300 Maraging Steel Rod –Premium Quality From A Trusted Manufacturer
18Ni300 Maraging Steel Rod is a low-carbon, ultra-high-strength alloy engineered for exceptional toughness and precision. With 18% nickel and a unique aging process, this Round bar excels in aerospace, defense, and tooling, delivering strength up to 2060 MPa after heat treatment—perfect for critical applications.
Price: Contact Us for a Custom Quote
Interested in 18Ni300 Maraging Steel Rod pricing? Contact us at sales for a custom quote. Our Round bar and hexagonal bar options offer top performance at competitive rates.
Specifications
Our Steel Rod comes in various configurations:
- Standards: ASTM A579, EN 1.2709, UNS K93120
- Diameter: 0.25″ – 6″ (6.35 mm – 152.4 mm)
- Length: Up to 12 ft (3658 mm), customizable
- Shapes: Round bar, hexagonal bar
- Surface Finish: Annealed, polished, or as-rolled
Key Features (Advantages)
- Ultra-high strength post-aging (1900-2060 MPa)
- Excellent toughness and ductility
- Low distortion during heat treatment
- Superior weldability and machinability
- High fatigue resistance
Applications
- Aerospace: Landing gear, rocket motor shafts
- Defense: Missile rods, high-strength fasteners
- Tooling: Extrusion dies, punch rods
- Automotive: Performance shafts, gears
- Energy: Turbine components
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 Steel offers moderate resistance to mild acids and alkalis but falters in highly oxidizing conditions like nitric acid due to low chromium content. Its strength-focused design prioritizes toughness over corrosion resistance.
Things to Note (Limitations)
- Strength drops above 480°C (900°F)
- Limited corrosion resistance in acidic extremes
- Higher cost due to nickel and cobalt
- Requires post-weld aging for full strength
Corrosion Data
| 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, as-built condition | Build orientation, aging |
| 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, 1 mM Hâ‚‚S, COâ‚‚ saturated | Austenite reversion, aging temp |
| Nitric Acid (10%) | 0.8 – 1.2 | 25°C, oxidizing environment | Low Cr content, heat treatment |
| Caustic Soda (10%) | 0.05 – 0.1 | 25°C, de-aerated | Temperature, concentration |
Welding and Manufacturing Tips
- Welding: TIG with matching fillers; age at 480-500°C for 3 hours post-weld.
- Forming: Anneal at 820°C before shaping Round bar or hexagonal bar.
- Machining: Use sharp tools, low speeds—pre-aging enhances machinability.
Customer Reviews
Frequently Asked Questions
Q: How does 18Ni300 Maraging Steel Rod compare to stainless steel?
A: 18Ni300 Maraging Steel offers much higher strength (up to 2060 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 Round Bar 18Ni300?
A: Aerospace and defense—perfect for shafts and fasteners. Our factory in China supplies Round bar optimized for these high-performance needs.
Q: Is 18Ni300 Maraging Steel better than titanium?
A: 18Ni300 Steel delivers greater strength (2060 MPa vs. 1100 MPa) and easier machining than titanium, but it’s heavier and less corrosion-resistant—best for strength-driven applications.
Q: Can 18Ni300 Steel handle high temperatures?
A: Yes, up to 480°C—beyond that, 18Ni300 Maraging Steel weakens, so it’s suited for moderate heat environments.
Q: How weldable is 18Ni300 Maraging Steel ?
A: Very weldable with TIG and matching fillers—age post-weld at 480°C to restore full strength.