Acero AleadoBarra/Varilla
Descripción General
Maraging 300 (18Ni Maraging 300) is an ultra-high-strength, low-carbon iron-nickel martensitic steel that achieves its strength through age hardening (maraging) rather than carbon content. With approximately 18% nickel and 12% cobalt, Maraging 300 round bar delivers tensile strength of 1,930 MPa (280 ksi) minimum, combined with excellent fracture toughness, dimensional stability during heat treatment, and superior weldability. The round bar form is supplied in solution-annealed condition for machining, followed by a low-temperature aging cycle (480°C / 900°F) to develop full strength. It is widely used in aerospace, defense, tooling, and high-performance applications requiring extreme strength and toughness.
Rango de Tamaño
- Dia.:6 – 400mm(0.25 – 16in)
- L:1,000 – 4,000 mm (standard 3,000–3,500 mm)
Especificación de Grado
| Sistema | Valor |
|---|---|
| 🇺🇸 UNS | K93120 |
| 🇺🇸 AMS | 6514 |
| 🇺🇸 ASTM | A538 Grade A |
| 🇩🇪 DIN | 1.6354 / X2NiCoMo18-9-5 |
| 🇪🇺 EN | EN 1.6354 |
| 🇨🇳 GB | 00Ni18Co8Mo5TiAl / 18Ni(300) |
Composición Química
| Elemento | Valor |
|---|---|
| C | ≤ 0.03 |
| Mn | ≤ 0.10 |
| Si | ≤ 0.10 |
| P | ≤ 0.01 |
| S | ≤ 0.01 |
| Ni | 18.00 – 19.00 |
| Co | 8.50 – 9.50 |
| Mo | 4.60 – 5.20 |
| Ti | 0.50 – 0.80 |
| Al | 0.05 – 0.15 |
| Zr | ≤ 0.01 |
Propiedades Mecánicas
| productCenter.property | Valor |
|---|---|
| Tensile Strength (MPa) | 950 – 1,100 |
| Yield Strength (MPa, 0.2% offset) | 650 – 850 |
| Elongation (%) | 15 – 20 |
| Reduction of Area (%) | 65 – 75 |
| Hardness (HRC) | 28 – 35 |
| Hardness (HB) | 280 – 340 |
| Impact Energy, Charpy V-Notch (J) | 75 – 100 |
Propiedades Físicas
| Propiedad | Unidad | Valor |
|---|---|---|
| Density (g/cm³) | g/cm³ | 8.00 |
| Melting Range (°C) | °C | 1,410 – 1,450 |
| Modulus of Elasticity (GPa) | GPa | 190 |
| Modulus of Rigidity (GPa) | - | 74 |
| Poisson's Ratio | - | 0.30 |
| Coefficient of Thermal Expansion (µm/m·°C, 20–100°C) | ×10⁻⁶/K | 11.0 |
| Coefficient of Thermal Expansion (µm/m·°C, 20–300°C) | ×10⁻⁶/K | 12.5 |
| Coefficient of Thermal Expansion (µm/m·°C, 20–500°C) | ×10⁻⁶/K | 13.0 |
| Thermal Conductivity (W/m·K, 25°C) | W/m·K | 20.0 |
| Specific Heat (J/kg·K) | J/kg·K | 450 |
| Electrical Resistivity (nΩ·m, 25°C) | μΩ·cm | 610 |
| Electrical Conductivity (% IACS) | - | 2.8 |
Aplicaciones
- Aerospace & Defense
- Tooling & Dies
- Industrial & Precision Engineering
- Oil & Gas
- Motorsport & Automotive
- Scientific & Instrumentation
- Firearms
- Medical