Alloy 42NKhTYu / Ni-Span-C Alloy 902

Alloy 42NHTYu: Properties, Applications, and Features

✅ General Technical Characteristics

Alloy 42NHTYu is a precision alloy with high thermal resistance, anti-corrosion properties, and dimensional stability. This material belongs to the group of Invar alloys, demonstrating minimal thermal expansion, making it indispensable in high-precision instruments and structures operating under temperature fluctuations.

Main Characteristics:

• Low coefficient of thermal expansion.
• High resistance to temperature variations.
• Good corrosion resistance.
• High mechanical strength.
• Excellent weldability and processability.

🔬 Chemical Composition of 42NHTYu (%):

• Nickel (Ni): 41 – 43
• Cobalt (Co): ≤ 1.0
• Chromium (Cr): 4.8 – 5.5
• Titanium (Ti): 1.8 – 2.2
• Manganese (Mn): ≤ 0.5
• Silicon (Si): ≤ 0.3
• Phosphorus (P): ≤ 0.015
• Sulfur (S): ≤ 0.015
• Iron (Fe): balance

💡 The addition of titanium and chromium enhances the alloy’s thermal resistance and strength, ensuring reliable performance in extreme conditions.

🏭 Applications

Due to its high thermal resistance and dimensional stability, 42NHTYu alloy is widely used in high-precision industrial applications.

Main Application Areas:

• Production of components for aviation and space technology.
• Manufacturing of parts for the radio-electronic industry.
• Production of precision mechanical instruments.
• Medical equipment and technologies.
• Structural elements operating in vacuum or aggressive environments.

📊 Mechanical Properties

• Tensile Strength (Rm): 1100 – 1300 MPa
• Yield Strength (Rp0.2): ≥ 700 MPa
• Hardness (HB): 250 – 300 HB
• Elongation (A5): ≥ 12 %

⭐ Features

• High dimensional stability – minimal geometric changes under temperature effects.
• Heat resistance – retains mechanical properties at high temperatures.
• Corrosion resistance – resistant to aggressive environments and moisture.
• Strength and wear resistance – high reliability in harsh operating conditions.
• Wide range of applications – used in advanced fields of science and technology.

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