Slotted Molybdenum Cylinder

I. Product Overview

Our high-purity precision molybdenum custom hollow rings are designed for high-strength ultra-high temperature (1100 °C-1900 °C) vacuum and inert gas protection. The product is made of high-density moli plate/pipe (molybdenum content ≥ 99. 95%), and is made by precise CNC turning, four-axis CNC milling and wire cutting.

As shown in the physical object in the figure, the component has a multi-window rectangular hollow structure, which not only significantly improves the overall heat and weight of the high-temperature component, but also provides an accurate technical channel for thermal radiation, optical observation or airflow circulation. We strictly control the processing stress and dimensional tolerance (up to ± 0. 02 mm) to ensure that the product still has extremely high structural strength and shape stability under the conditions of high temperature thermal cycle and strong Thermal Shock (Thermal Shock), and does not blister or bend deformation.

II. Product selling points and advantages

1. Highly complex precision CNC hollowing out processing capability

The multi-window rectangular hollow structure in the figure has extremely high requirements for processing stress management and tool control. We have advanced four-axis CNC milling and wire cutting equipment, which can not only ensure that the corners of each hollow window are free of stress concentration and burrs, but also ensure that large thin-walled rings are not deformed during processing.

2. Extremely high thermal stability and creep resistance

In high temperature vacuum above 1200 ℃, ordinary metals are prone to deformation and sagging. We use dense molybdenum billets rolled and forged many times, and undergo high vacuum stress relief annealing after processing, which significantly improves the re-crystallization temperature and creep resistance of the product (if higher strength creep resistance is required, we recommend Choose TZM alloy).

3. Excellent ultra-high vacuum

The high-purity chemical composition and strictly controlled gaseous impurities (O, N, H < 100 ppm) allow the molybdenum ring to have an extremely low outgassing rate at ultra-high vacuum above 10 ° Pa and will never pollute high-temperature reaction chambers or semiconductor wafers in processing.

4. 100% Compliance Customization and Rapid Prototyping

Whether it is a single sample from a scientific research institution or a batch purchase of hundreds of industrial-grade vacuum furnaces, we can directly interpret the STEP, IGES, DXF, DWG and other CAD vector files provided by the purchaser, and realize fast sample delivery within 10-15 days.

III. Table of Core Parameters and Specifications

1. Basic physical and chemical properties

Property	Value	Notes
Grade	Mo1 (Pure Molybdenum, High Purity) TZM Alloy (Mo-0. 5Ti-0.08Zr-0.02C, reinforced alloy)	Complies with ASTM B387/ASTM B386 specification
Purity	≥ 99. 95% (pure molybdenum)	Extremely strict gas impurity control (O, N, C, H)
Density	10.2 g/cm ³ (pure molybdenum)/10.22 g/cm ³ (TZM)	High density, dense and defect-free micro-structure
Melting Point	2623 ℃ (4753 ℉)	One of the representatives of high melting point materials in elemental metals
CTE	4.8 × 10⁻⁶ / K (20-1000℃)	Extremely low thermal rate, matching silicon, quartz and ceramic materials
Thermal Conductivity	138 W/(m · K) (at room temperature about 20 °C)	Excellent heat dissipation and heat conduction performance at high temperature
Working Temp.	Pure molybdenum: ≤ 1700 °C; TZM alloys: ≤ 1900 ℃	Must be used in vacuum or without oxidizing inert gas protection

2. Processing technology and size specifications

Item	Specification
Outer Diameter	Ø 30 mm-Ø 800 mm (fully customized to drawing)
Wall Thickness	1.0 mm – 30 mm
Height	10 mm – 500 mm
Tolerance	± 0. 02 mm-± 0. 05 mm (High Precision CNC Turning/Milling)
Technology	CAD/CAM Drives CNC Four-axis Milling, Wire EDM, CNC Turning, High Vacuum Stress Relief AnnealingCAD/CAM Drives CNC Four-axis Milling, Wire EDM, CNC Turning, High Vacuum Stress Relief Annealing
Surface Finish	Machined (finishing/milling surface), Pickled cleaning (Pickled), Polished surface (Polished), clean oil-free surface
Standards	ASTM B387 (Molybdenum and Molybdenum Alloy Bar, Rod, and Wire) ASTM B386, ISO 9001: 2015 Management Systems Certification

IV. Typical Application Fields

Vacuum Industrial Furnace and Heat Treatment: As a heat insulation screen bracket ring, positioning collar ring, radiation screen fixing member and heating element suspension ring in Vacuum resistance furnace and induction heating furnace.

Sapphire Crystal Growth Furnace: Thermal conduction ring, base insulation sleeve and observation window mask used in bubble boundary method/white blue method sapphire growth furnace.

Semiconductor and heat treatment equipment (Semiconductor & CVD/MOCVD): thermal field balance ring, PVD coating shield ring, high temperature gas distribution collar in wafer heat treatment cavity.

Monocrystalline and polycrystalline silicon (Photovoltaic & Silicon Processing): Corrosion-resistant and high-temperature-resistant structural support rings in high-temperature reactors.

V. Quality Control and Security Packaging

Quality Inspection: Each batch of ex-factory products comes with a material certificate (MTC) in compliance with EN 10204 3.1 specification, including chemical composition analysis report, three-coordinate (CMM) dimension measurement report and surface roughness detection data.

Export Standard Packaging: For the precision molybdenum ring with hollow structure, we use custom-shaped foam pearl cotton (EPE) for 1-to-1 built-in wrapping, and put it into a moisture-proof vacuum bag, and the outer layer is fixed with a fumigation-free export wooden box, ensuring 100% zero damage in long-distance sea and air express delivery.