Chronifer 108 / UNS S31673 (Modified) / 1.4441 (Bio) / X2CrNiMo18-15-3

Alloy Chronifer 108 / 9.9007 / UNS S29108: Properties, Applications, and Features

✅ General Technical Characteristics

Alloy Chronifer 108 (9.9007 / UNS S29108) is a high-alloy precision alloy with excellent corrosion resistance, high strength, and thermal stability. It is specifically designed for use in demanding conditions requiring reliability, oxidation resistance, and mechanical strength. Due to its unique combination of physical and chemical properties, this alloy is in demand across various industries.

Main Characteristics:

• High corrosion resistance in aggressive environments.
• Excellent mechanical strength and hardness.
• Resistance to oxidation and thermal loads.
• Good weldability and machinability.
• Durability in extreme operating conditions.

🔬 Chemical Composition Chronifer 108 / 9.9007 / UNS S29108 (%):

• Carbon (C): ≤ 0.05
• Silicon (Si): ≤ 1.0
• Manganese (Mn): ≤ 1.5
• Phosphorus (P): ≤ 0.040
• Sulfur (S): ≤ 0.030
• Chromium (Cr): 14.0 – 16.0
• Nickel (Ni): 5.0 – 7.0
• Molybdenum (Mo): 2.5 – 3.5
• Cobalt (Co): 8.0 – 10.0
• Titanium (Ti): 0.8 – 1.2

💡 The addition of molybdenum, cobalt, and titanium enhances heat resistance and improves resistance to aggressive chemical environments.

🏭 Applications

Alloy Chronifer 108 (9.9007 / UNS S29108) is used in high-precision and critical components where high load and corrosion resistance are required.

Main Application Areas:

• Aerospace industry (engine components, structural elements).
• Medical industry (implants, surgical instruments).
• Automotive industry (turbochargers, exhaust system components).
• Energy sector (gas turbine components, steam generators).
• Tool manufacturing (precision components, cutting tools).

📊 Mechanical Properties

• Tensile Strength (Rm): 900 – 1100 MPa
• Yield Strength (Rp0.2): ≥ 600 MPa
• Hardness (HB): 280 – 350 HB
• Elongation (A5): ≥ 15 %

⭐ Features

• Heat resistance – maintains strength and oxidation resistance at high temperatures.
• Wear resistance – resistant to mechanical and thermal loads.
• Biocompatibility – used in medical devices and implants.
• Excellent corrosion resistance – withstands exposure to aggressive chemicals.
• Durability – high reliability even under extreme operating conditions.

Chronifer 108 steel delivery forms