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Industrial Pure Molybdenum / High-Temperature Molybdenum Tubes

Molybdenum tubes are core industrial components that combine the extreme performance of metallic molybdenum with the structural advantages of tubes. Using high-purity molybdenum as the base material, they form a hollow structure after precision processing. They not only retain molybdenum's "high-temperature king" characteristics of withstanding extreme environments but also possess the adaptability of tubes in scenarios such as fluid transportation, electrode conduction, and structural support. In harsh working conditions such as high temperature above 1600℃, strong corrosion, and high vacuum, molybdenum tubes can replace ordinary metal tubes to achieve long-term stable operation, significantly reducing equipment maintenance costs. They are indispensable key materials in the field of high-end manufacturing.

Product specification

Product Parameters

Product Information

Parameter Category	Detailed Specifications	Customization Instructions
Outer Diameter Range	3mm-200mm (conventional)	Supports customization of smaller/larger outer diameters with precision up to ±0.02mm
Inner Diameter Range	1mm-180mm (conventional)	Matched on demand according to outer diameter and wall thickness; inner wall finish Ra ≤ 0.8μm
Wall Thickness Specification	0.5mm-10mm (conventional)	Customization of special thin-walled/thick-walled tubes available; wall thickness tolerance ±0.01mm
Length Range	50mm-6000mm (conventional)	Can be cut according to installation requirements; length tolerance ±1mm
Tolerance Standard	Compliant with ASTM B386 international standard	Supports customization of higher precision for military-grade applications

Product Name	Pure Molybdenum Tube, High-Temperature Molybdenum Tube
Brand Name	Yunjie
Model	Mo1 / Mo-La
Core Material	High-Purity Molybdenum (Mo1), High-Temperature Molybdenum (Mo-La)
Core Process	Multi-pass cold rolling forming + vacuum annealing for stress relief, precise dimension control
Purity Standard	Pure molybdenum tube
Basic Density	10.2g/cm³
Core Advantages	Resistant to ultra-high temperature of 2600℃, excellent electrical and thermal conductivity, high strength at room temperature, corrosion and creep resistance, high dimensional accuracy, smooth and impurity-free inner wall
Surface Condition	Cold-rolled bright surface (high cleanliness), vacuum-annealed surface (high stability)
Shape Specifications	Straight tube, coiled tube
Value-Added Services	Precision cutting, turning threads, drilling and tapping, seamless welding, flaw detection
Minimum Order Requirement	Minimum order of 1 kilogram; tiered discounts available for bulk purchases

Classification

Classification by Wall Thickness Characteristics

•Thin-Walled Molybdenum Tube (0.5mm-2mm): Focuses on lightweight and high sealing performance, with smooth inner wall free of burrs. Suitable for scenarios such as precision fluid transportation and micro-electrode sleeves, e.g., semiconductor high-purity gas pipelines.
•Thin-Walled Molybdenum Tube (0.5mm-2mm): Focuses on lightweight and high sealing performance, with smooth inner wall free of burrs. Suitable for scenarios such as precision fluid transportation and micro-electrode sleeves, e.g., semiconductor high-purity gas pipelines.
•Thick-Walled Molybdenum Tube (5mm-10mm): Possesses super mechanical strength, high pressure and impact resistance, suitable for extreme environments, e.g., high-temperature component support tubes in aerospace and large chemical reaction pipelines.
Classification by Process Characteristics

•Cold-Rolled Molybdenum Tube: Core conventional product with high dimensional accuracy, good roundness, and wall thickness uniformity superior to industry standards. Suitable for most industrial scenarios.
•Vacuum-Annealed Molybdenum Tube: Eliminates cold rolling internal stress, improves high-temperature stability by more than 30%, and has excellent creep resistance. Can be used for a long time in environments at 1800℃.
Classification by Material Characteristics

•Pure Molybdenum Tube (Mo1): High purity brings excellent electrical and thermal conductivity and strong corrosion resistance. Suitable for general high-end scenarios such as electronics and power, and medical equipment.
•High-Temperature Molybdenum Tube (Mo-La): Added with rare earth lanthanum oxide, its high-temperature strength is increased by 40%, and it maintains stable performance above 1800℃. It is the first choice for extreme working conditions in metallurgy and aerospace fields.

Accurate Selection and Composition Guarantee

Scenario-Based Specification Selection Table

Authoritative Chemical Composition Table

Wall Thickness Range	Dimensional Tolerance	Core Characteristics	Accurately Adaptable Scenarios
0.5-1.0mm	Outer diameter: ±0.02mm; Inner diameter: ±0.03mm	Ultra-high purity, good sealing performance, stable conductivity	Semiconductor high-purity gas transportation, electrode sleeves for microelectronic devices, laboratory reaction vessels
1.0-2.0mm	Outer diameter: ±0.03mm; Inner diameter: ±0.04mm	Balance of flexibility and stability, corrosion resistance	Filament protective tubes for electric light sources, diversion tubes for vacuum coating, temperature measurement tubes for small and medium-sized high-temperature furnaces
2.0-3.0mm	Outer diameter: ±0.04mm; Inner diameter: ±0.05mm	Qualified strength, good fluidity	Support tubes for electrovacuum devices, transportation tubes for solar cell production
3.0-5.0mm	Outer diameter: ±0.05mm; Inner diameter: ±0.06mm	Enhanced rigidity, good processability	Support tubes for vacuum furnace heat shields, cooling pipelines for power semiconductors, accessories for sapphire crystal growth furnaces
5.0-10.0mm	Outer diameter: ±0.10mm; Inner diameter: ±0.12mm	High strength, creep resistance, weldability	Aerospace high-temperature components, heating tubes for large vacuum furnaces, corrosion-resistant transportation tubes for chemical industry

Grade	Mo	Al	Ca	Fe	Mg	Ni	Si	C	N	O	Lanthanum Oxide Addition
Mo1	Balance	20	20	100	20	50	100	100	30	80	—
Mo-La	Balance	20	20	150	50	50	100	200	50	—	0.1%-1.8%

Characteristics

Ultra-High Temperature Resistance

With a melting point of 2620℃, it maintains stable mechanical properties below 1600℃ and can be used for a short time at 1800℃, far exceeding conventional materials such as stainless steel and titanium alloy, making it suitable for extreme high-temperature working conditions.

Efficient Conduction

Its conductivity reaches 35% of that of copper, with excellent thermal conductivity. It has both electrode conduction and heat dissipation functions, reducing energy loss and improving equipment operation efficiency.

Strong Structural Performance

Supported by cold rolling + vacuum annealing process, it has a room-temperature tensile strength of ≥700MPa, strong deformation resistance, and can withstand a certain pressure with precise roundness and uniform wall thickness.

Comprehensive Corrosion Resistance

Stable in non-oxidizing acids, alkaline solutions, and most organic solvents, with no impurity precipitation at high temperature. Its service life is 5-10 times that of ordinary tubes, with wear resistance and aging resistance.

Vacuum-Grade Adaptability

Extremely low high-temperature vapor pressure, smooth inner wall without burrs, suitable for vacuum environments and high-purity medium transportation, with reliable sealing performance and no cross-contamination risk.

No Magnetic Interference

Does not generate magnetic fields, perfectly suitable for magnetically sensitive scenarios such as electronic instruments and medical equipment, ensuring the detection and operation accuracy of the equipment.

Production Process

High-Purity Raw Material Preparation: Select molybdenum concentrate with a purity of over 99.97%, extract high-purity molybdenum powder through roasting and hydrogen reduction processes, and press it into high-density molybdenum billets.
Billet Forming Processing: The molybdenum billet is forged and hot-rolled to form a homogeneous solid molybdenum rod, ensuring no internal pores or inclusions.
Precision Tube Forming: Adopt multi-pass cold rolling + drawing process to gradually process into hollow tubes, controlling the reduction per pass to ≤15% to ensure dimensional accuracy.
Vacuum Annealing Treatment: Hold in a 1200℃ vacuum environment for 4 hours to eliminate processing internal stress and improve material ductility and high-temperature stability.
Finishing and Inspection: Go through CNC cutting, ultrasonic flaw detection, dimensional inspection, and surface cleaning to eliminate unqualified products, with attached material analysis reports.
Customized Delivery: Complete deep processing such as threading and welding according to customer needs, and perform vacuum packaging to prevent oxidation, ensuring the product is delivered in good condition.

Application Fields

Electronics and Power Field

Vacuum electron tube shells, semiconductor high-purity gas transportation tubes, lithium battery electrode sleeves, and power semiconductor cooling pipelines ensure efficient and stable operation of equipment.

Aerospace Field

High-temperature support tubes for aircraft engines, heat insulation and diversion tubes for spacecraft, and fluid tubes for rocket propulsion systems, withstanding extreme environment tests.

Metallurgy and Chemical Industry

Heating element sleeves for high-temperature furnaces, corrosion-resistant transportation tubes for chemical industry, and catalyst carrier tubes reduce equipment loss and lower maintenance costs.

Medical Equipment Field

Radiation shielding sleeves and precision fluid tubes for medical equipment, with no magnetic interference and good biocompatibility.

New Energy Field

High-purity gas tubes for solar cells and diversion tubes for hydrogen fuel cells improve energy conversion efficiency.

Precision Instrument Field

Sensor protective tubes and instrument signal transmission tubes, adapting to the requirements of miniaturization and high reliability.

Send Inquiry

Baoji Yunjie (Yunjie) – a professional provider of metal tube solutions. Beyond molybdenum tubes, we also supply a full range of metal tubes, strips, and foils, including titanium, zirconium, nickel, tantalum, and tungsten. We support customized R&D and production. Whether you have requirements for standard procurement or customization for special working conditions, please feel free to contact us at any time – we will provide you with a one-stop material solution!