Aleaciones EspecialesChapa/Placa
Descripción General
Invar 36 (also known as Nilo 36, Pernifer 36, FeNi36) is an iron-nickel alloy containing approximately 36% nickel. It is renowned for its extremely low coefficient of thermal expansion (CTE) — approximately one-tenth that of carbon steel at room temperature. This unique property makes Invar 36 the benchmark material for applications requiring exceptional dimensional stability across temperature variations.
Descripción (Inglés)
Coefficient of Thermal Expansion (CTE) 20 – 100°C (68 – 212°F)//CTE (ppm/°C)1.2 – 1.3 20 – 200°C (68 – 392°F)//CTE (ppm/°C)2.0 – 2.5 20 – 300°C (68 – 572°F)//CTE (ppm/°C)5.5 – 6.5 20 – 400°C (68 – 752°F)//CTE (ppm/°C)8.0 – 9.0 20 – 500°C (68 – 932°F)//CTE (ppm/°C)11.0 – 12.0
Rango de Tamaño
- Thickness:0.5 mm – 100 mm (0.020" – 4") — up to 150 mm custom
- Width:500 mm – 1,500 mm (20" – 60") Length 1,000 mm – 3,000 mm (40" – 120")
- Length:1,000 mm – 3,000 mm (40" – 120")
Especificación de Grado
| Sistema | Valor |
|---|---|
| 🇺🇸 UNS | K93600 / K93601 |
| 🇺🇸 ASTM | F1684 (plate), AMS I-23011 |
| EN / DIN | 1.3912 |
| AFNOR | FeNi36 |
| 🇬🇧 BS | NILO 36 |
| 🇯🇵 JIS | — (supplied to ASTM) |
| 🇨🇳 GB | 4J36 (expansion alloy) |
| Trademarks | Invar®, Nilo®, Pernifer®, FeNi36 |
Composición Química
| Elemento | Valor |
|---|---|
| Ni | 35.0 – 37.0 |
| C | ≤ 0.05 |
| Si | ≤ 0.30 |
| Mn | ≤ 0.60 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
| Cr | ≤ 0.25 |
| Co | ≤ 0.25 |
| Fe | Balance |
Propiedades Mecánicas
| productCenter.property | Valor |
|---|---|
| Tensile Strength Rm | 440 – 550 MPa (64 – 80 ksi) |
| 0.2% Yield Strength | 240 – 310 MPa (35 – 45 ksi) |
| Elongation A (50 mm) | 30 – 45% |
| Reduction in Area | 55 – 70% |
| Hardness | 125 – 160 HB |
| Impact KV2 (room temp) | 80 – 120 J |
Propiedades Físicas
| Propiedad | Unidad | Valor |
|---|---|---|
| Density | g/cm³ | 8.05 g/cm³ (0.291 lb/in³) |
| Melting Point | °C | ~1,430 °C (2,606 °F) |
| Modulus of Elasticity | GPa | 141 GPa (20.5 × 10⁶ psi) |
| Shear Modulus | - | 52 GPa |
| Poisson's Ratio | - | 0.29 |
| Thermal Conductivity (20°C) | W/m·K | 10.5 W/(m·K) |
| Specific Heat (20°C) | J/kg·K | 0.515 J/(g·K) |
| Electrical Resistivity (20°C) | μΩ·cm | 0.82 μΩ·m |
| Curie Temperature | - | ~277 °C (531 °F) — above this, magnetic properties are lost and CTE increases |
| Magnetism | - | Ferromagnetic (below Curie temperature) |
Aplicaciones
- Precision Instruments & Metrology
- Aerospace & Defense
- Electronics & Semiconductors
- Cryogenic & LNG
- Industrial