Special Alloys
Rely on Stellite 6 Alloy superalloy for exceptional heat and corrosion resistance across demanding environments.
Suitable for investment casting, mould manufacturing, and automotive applications. Its excellent heat resistance, high strength, and corrosion resistance make it ideal for mould and forming operations. It improves the performance and durability of critical components.
Melting of virgin elements to make ingots of Stellite 6 Alloy by Vacuum Induction melting (VIM)
Alloy chemistry and ingot specifications are finalized as per application requirements.
As per customer requirements, mould design carried out and planned for charge preparation, charge sequences in VIM furnace. Careful selection of raw materials are the prime factor to achieve specified chemistry of an alloy.
Virgin elements are charged into the VIM furnace either in air or under vacuum, with precise adjustments made for trace element additions during melting.
The melt is poured under vacuum into precision-engineered molds using an automatic tilting mechanism for defect-free solidification. With online temperature, Spectro, and oxygen data, we meticulously control melting and refining to achieve the specified ingot composition.
Post-casting processes include surface treatment, cropping, and preparation of ingots for downstream processing.
Every batch is tested for chemical composition by Spark- OES / wet analysis / Gas analysis, and physical compliance as per customer specification before secure packaging.
Properties
Performs under pressure—resistant to saline, heat, and mechanical stress in critical environments.
Alloy | Mechanical properties* | PML alloy: as cast* | After Heat treatment* |
PML Cobalt Alloy 6
*Typical | Rockwell Hardness (HRC) | 36 - 45 | 30 Max |
| Tensile Strength Ultimate (UTS) | 850MPa | - |
| Tensile Strength Yield (YS) | Not Applicable | - |
| Elongation Break | Not Applicable | - |
| Reduction of Area | Not Applicable | - |
Process Capability
Custom ingot shapes and batch sizes tailored to exact customer specifications.
Input : Batch size | Output | Alloying Elements | Chemistry tolerance | Impurities Max |
30 kgs to 600 kgs | Ingot of required shape as per customers requirement | Cr and W on Co- base | +/- 0.5 % for Higher level % (Above 2 digit) and +/- 0.3 % for lower level % (Single digit) | Oxygen < 25ppm Hydrogen < 3ppm Nitrogen < 50ppm All other impurities < 50 ppm |
Chemical analysis performed using Ametek Spectromaxx.
Technical Specifications
Engineered to meet demanding specs with consistent quality and adaptable performance.
Element | Chemical Composition in wt% |
|
| Min (Wt%) | Max (Wt%) |
C | 1.0 | 1.15 |
Cr | 26.0 | 30.0 |
W | 3.5 | 5.5 |
Si | - | 2.0 |
Fe | - | 3.0 |
Ni | - | 3.0 |
Mn | - | 1.0 |
Mo | - | 1.0 |
Trace Elements | - | 0.1 |
Co | - | Remainder |
With over six decades of expertise, PML delivers high-performance component technologies and precision solutions trusted across critical industries.
ISO 45001
Occupational Health and Safety (OH&S) management systems
ISO 14001
Environmental Management Systems (EMS)
ISO 9001
Quality Management Systems (QMS)
IATF 16949
International Standard for Automotive Management Systems
AS 9100
Aerospace Quality Management System (QMS)
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