โลหะผสมพิเศษแผ่น/เพลท
ภาพรวม
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.
คำอธิบาย (อังกฤษ)
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
ช่วงขนาด
- 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")
ข้อกำหนดเกรด
| ระบบ | ค่า |
|---|---|
| 🇺🇸 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 |
องค์ประกอบทางเคมี
| ธาตุ | ค่า |
|---|---|
| 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 |
คุณสมบัติเชิงกล
| productCenter.property | ค่า |
|---|---|
| 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 |
คุณสมบัติทางกายภาพ
| คุณสมบัติ | หน่วย | ค่า |
|---|---|---|
| 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) |
การใช้งาน
- Precision Instruments & Metrology
- Aerospace & Defense
- Electronics & Semiconductors
- Cryogenic & LNG
- Industrial