Description

DILATON 29/18 (Kovar / UNS K94610 / ASTM F15) – FeNiCo Controlled Expansion Alloy Supplier in India

DILATON 29/18, manufactured by Auerhammer Metallwerk GmbH, Germany, is a precision iron-nickel-cobalt (FeNiCo) low expansion alloy known for its excellent thermal stability and controlled expansion properties. Commonly referred to as Kovar, UNS K94610, ASTM F15, Alloy 29-17, DIN 1.3981, this alloy is widely used in glass-to-metal sealing applications.

This vacuum melted controlled expansion alloy is produced under strict quality control to ensure uniform thermal expansion, consistent mechanical properties, and excellent formability, making it suitable for deep drawing, stamping, and machining.

🔹 Key Properties of DILATON 29/18 Alloy

• Low and controlled coefficient of thermal expansion
• Matches expansion of borosilicate glass (Pyrex)
• Excellent dimensional stability at cryogenic temperatures
• High mechanical strength and reliability
• Suitable for precision forming and machining
• Stable performance from -196°C to elevated temperatures

🔹 Equivalent Grades & Standards

• UNS: K94610
• ASTM: F15
• DIN: 1.3981
• Other Names: Kovar, FeNi29Co18, Alloy 29-17, Controlled Expansion Alloy

🔹 Chemical Composition (%)

• Nickel (Ni): 28.0 – 29.0
• Cobalt (Co): 17.0 – 18.0
• Manganese (Mn): ≤ 0.5
• Silicon (Si): ≤ 0.2
• Chromium (Cr): ≤ 0.2
• Copper (Cu): ≤ 0.2
• Aluminium (Al): ≤ 0.1
• Iron (Fe): Balance

🔹 Applications of DILATON 29/18 (Kovar Alloy)

• Glass-to-metal seals (borosilicate / Pyrex glass)
• Electronic components & hermetic packaging
• Power tubes, X-ray tubes, microwave tubes
• Transistors, diodes & integrated circuits
• Hybrid circuits & semiconductor packaging (DIP / flat pack)
• Ceramic-to-metal sealing applications

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🔹 Why Choose DILATON 29/18?

DILATON 29/18 is specifically designed for applications requiring precise thermal expansion matching with glass and ceramics, making it a critical material for electronics, aerospace, and vacuum technologies.

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