Alloy 48 / UNS K94800
Grade: Alloy 48 / UNS K94800 / Nilo 48
Sheet/Plate: 0.3mm-150mm
Strip/Foil: 0.02mm-16mm
Pipe: 6mm*0.5mm-1200mm*100mm
Bar: Ф6mm – Ф600mm
Wire: Ф0.01mm – Ф6mm
Others: Forged Rings, Flanges, Elbows, Tees, Reducers etc.
Standard: ASTM/ASME/AMS
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UNS K94800/Nilo 48/Alloy 48
Alloy 48 (Nilo 48) is a nickel-iron controlled-expansion alloy containing 48% nickel. Alloy 48 (Nilo 48 coefficient of thermal expansion matches that of soft lead and soda lime glasses therefore Alloy 48′s main use is for glass to metal seals in soft lead or soda lime type glasses. Alloy 48 is also used for thermostats in industrial applications up to 450°C (840°F).
Chemical Composition (wt.%):
| Iron, Fe | 49 |
| Nickel, Ni | 48 |
| Cobalt, Co | 1 |
| Manganese, Mn | 0.80 |
| Silicon, Si | 0.30 |
| Chromium, Cr | 0.25 |
| Aluminum, Al | 0.10 |
| Carbon, C | 0.050 |
| Phosphorous, P | 0.025 |
| Sulfur, S | 0.025 |
Mechanical Properties:
| Material | Ultimate Tensile Strength | Yield Strength 0.2 % | Elongation (%) | ||
| psi | MPa | psi | MPa | ||
| Alloy 48 | 75,000 | 520 | 38,000 | 260 | 43 |
Applications:
- Glass seals
- Electronic packages
- Optical devices


UNS K94800/Nilo 48/Alloy 48
Alloy 48 (Nilo 48) is a nickel-iron controlled-expansion alloy containing 48% nickel. Alloy 48 (Nilo 48 coefficient of thermal expansion matches that of soft lead and soda lime glasses therefore Alloy 48′s main use is for glass to metal seals in soft lead or soda lime type glasses. Alloy 48 is also used for thermostats in industrial applications up to 450°C (840°F).
Chemical Composition (wt.%):
| Iron, Fe | 49 |
| Nickel, Ni | 48 |
| Cobalt, Co | 1 |
| Manganese, Mn | 0.80 |
| Silicon, Si | 0.30 |
| Chromium, Cr | 0.25 |
| Aluminum, Al | 0.10 |
| Carbon, C | 0.050 |
| Phosphorous, P | 0.025 |
| Sulfur, S | 0.025 |
Mechanical Properties:
| Material | Ultimate Tensile Strength | Yield Strength 0.2 % | Elongation (%) | ||
| psi | MPa | psi | MPa | ||
| Alloy 48 | 75,000 | 520 | 38,000 | 260 | 43 |
Applications:
- Glass seals
- Electronic packages
- Optical devices
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