Molybdenum Glass Melting Electrodes
Molybdenum glass melting electrodes for the melting, homogenizing, feeding, and shaping of glass products. These high-purity electrodes offer more control over the glass melting process with advanced electrical properties and maximum operating efficiency.
Our unique capabilities include an advanced powder metallurgy process and a 5,500-ton extrusion press. Both allow us to produce the highest quality molybdenum material. We also machine simple or complex thread forms to precise customer requirements.
Elmet Technologies is the only U.S. based producer offering a range of electrodes for the most demanding glass melting applications.
Your Partner for Molybdenum Glass Melting Electrodes
Elmet Technologies regularly partners with glass manufacturers and furnace OEMs to provide the glass industry with the highest quality and highest purity molybdenum glass melting electrodes.
Molybdenum electrodes: Overivew
- Oxidation resistant coatings
- Standard metric or tapered threads
- Bubble free, low carbon electrodes
- Uniform recrystallized grains for creep resistance
- Electrodes from 1.25 in (32 mm) to 8 in (203 mm) in diameter
- Machined or centerless ground surfaces for assurance of concentricity and straightness
A Leading Global Supplier to the Glass Industry
Elmet Technologies understands the demanding environments of the glass industry. Our high-performance molybdenum glass melting electrodes perform extremely well in hot molten glass, quartz melting and forming, and sputtered thin films for photovoltaic substrates. Elmet product solutions enable reduced contamination in the glass melt, while yielding the highest glass purity.
Aside from our products, our unmatched technical experience and glass applications knowledge allows us to partner with each customer. Through this collaboration, we continue to create the most innovative products with superior performance. This benefits various processes in melting, homogenizing, feeding, and shaping of glass products in gas and electric glass melting furnaces.
Elmet Technologies expertise in powder metallurgy and refractory metals enables us to supply a complete and advanced line of molybdenum electrodes with the highest standards and technical expertise for efficient glass melting and electric boosted melting.
Oxidation Resistant Coatings for molybdenum
Elmet Technologies offers coatings that provide molybdenum and other refractory metals with outstanding protection against oxidation at high temperatures found in glass melting applications. These coatings are ideally suited for the coating of molybdenum glass melting electrodes and other components for the glass industry, protecting them from oxidation during the critical start-up period.
Technical Data
Chemical Characteristics¹
(Mass fraction in % [cg/g]; ppm [μg/g])
¹Information on testing methods available upon request.
The chemical composition of Mo powder used for producing glass melting electrodes shall conform to the following limits:
| Mo | min. | 99.95% |
| C | max. | 0.005% |
| Ca | max. | 0.003% |
| Cu | max. | 0.002% |
| Fe | max. | 0.005% |
| Mg | max. | 0.001% |
| Mn | max. | 0.001% |
| Ni | max. | 0.0015% |
| Sn | max. | 0.003% |
Structure
Electrodes will normally be shipped as stress relieved. Material can be supplied in the re-crystallized condition upon request.
Dimensional Tolerances
| Diameter inches | mm | Diameter Variation inches | mm | Out-of-Round inches | mm |
| 1-1/4 | 31.7 | +/- 0.015 | ± .38 | 0.015 | 0.38 |
| 1-1/2 | 38.1 | +/- 0.015 | ± .38 | 0.020 | 0.51 |
| 2 | 50.8 | +/- 0.030 | ± .76 | 0.025 | 0.63 |
| 2-1/2 | 63.5 | +/- 0.030 | ± .76 | 0.025 | 0.63 |
| 3 | 76.2 | +/- 0.040 | ± 1.0 | 0.035 | 0.89 |
| 4 | 101.6 | +/- 0.040 | ± 1.0 | 0.050 | 1.27 |
Straightness
Maximum variations from straightness will be 0.030 inch per foot (2.50 mm per meter). Maximum variation in cut lengths will be +1/4“, -0 inch (+6.35 mm, -0 mm). Special available tolerances upon request.
Threading
U.S. and European standard and special threads are available on either or both ends.
Surface Condition
Molybdenum glass melting electrodes will be supplied with centerless ground or machined surfaces of 128 micro inch or better. Minor surface imperfections may be removed by conditioning while maintaining the dimensional tolerance.
Identification
All electrodes identified with an appropriate lot number. All shipments marked with the name of the customer and the purchase order number.
Hazards identification in Advertising (REGULATION (EC) No 1272/2008 Article 48) None.
Rejection
Elmet Technologies must receive written notification of rejected material with the reason for rejection. The right is reserved to inspect rejected material at customer plant for claim validation. The material may be returned only after proper authorization.
tapered threads
Our tapered thread version of molybdenum glass melting electrodes are automatically self-sealing, allowing for a 60% reduction in connect time. In addition, they are less prone to galling or misalignment. Converter electrodes are also available for changing between electrodes.