Cobalt-Chromium Alloy Tube

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Cobalt-chromium tubes are high-performance metal tubes manufactured primarily from cobalt-chromium alloys, often alloyed with molybdenum, nickel, and tungsten to enhance their corrosion resistance, strength, and hardness. Known for their outstanding resistance to both acidic and alkaline environments, these alloy tubes also offer excellent mechanical strength and wear resistance. Their exceptional material properties make them a preferred choice for demanding applications across medical devices, aerospace systems, petrochemical processing, power generation, and precision engineering.

Available Grades: L605
Outer Diameter: 6 mm - 150 mm, or customizable
Wall Thickness: > 5 mm, or customizable
Length: 100 mm and above (customizable)

Physical Properties

Density	8.3-8.9 g/cm³
Melting Point	1310-1495 ℃
Coefficient of Thermal Expansion (CTE)	12.5-14.2µm/m·°C (20-250°C)
Thermal Conductivity	14-69 W/m·K
Specific Heat Capacity	20 J/kg·K

Mechanical Properties

Hardness	HRC 30-55
Tensile Strength	≥700 MPa (e.g., medical-grade L605 in annealed condition)
Yield Strength	≥550 MPa
Elongation	≥3.0% - 15%

Features

High tensile strength (≥700 MPa)
Excellent machinability (annealed elongation ≥35%)
Outstanding corrosion resistance (corrosion rate <0.01 mm / year)
Good thermal and electrical conductivity (thermal conductivity: 12.3–23.9 W/m·K; electrical conductivity: ~20% IACS)
Exceptional wear resistance (hardness: HRC 40–55; wear rate is only 1/10 that of 304 stainless steel)
Strong creep resistance (retains high strength at 760°C)

Applications

Medical: Used in coronary stents (e.g., L-605 alloy tubes), providing radial strength and promoting rapid endothelialization for vascular repair
Aerospace: Applied in rocket engine nozzles serving as injector components capable of withstanding oxidation in liquid oxygen/kerosene flame environments
Precision instruments: Utilized as thermocouple protection tubes, cobalt-chromium-tungsten alloy tubes resist vibration and wear at temperatures up to 1200°C

Packaging

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