Wear resistance where surface failure is expensive
Stellite alloys are cobalt-chromium wear alloys selected when standard stainless steels cannot survive galling, metal-to-metal sliding, erosion, cavitation or high-temperature wear. In valves and process equipment, the Stellite layer or component is often small, but its failure can decide the life of the assembly.
Premiere Advanced Materials supports Stellite 6, Stellite 12 and Stellite 21 enquiries for Indian buyers who need grade clarity, heat traceability, certificate control and compatibility with their hardfacing or machining route.
Common RFQ details
- Grade: Stellite 6, 12 or 21
- Form: rod, bar, powder or hardfacing consumable
- Diameter / size / length / quantity
- Applicable drawing, procedure or customer specification
- Certificate requirement: EN 10204 3.1 or additional inspection
Stellite grade selection at a glance
| Grade | Selection Logic | Typical Uses | Buyer Checks |
|---|---|---|---|
| Stellite 6 | Balanced wear, corrosion resistance, hot hardness and weldability. | Valve seats, trim, pump sleeves, cutting surfaces, hardfacing overlays. | Confirm form, chemistry, hardness target, deposition route and dimensional tolerance. |
| Stellite 12 | Higher carbide content and higher wear resistance than Stellite 6, with reduced toughness/machinability. | Severe abrasion, cutting surfaces, high-wear valve and tooling applications. | Confirm machinability expectation, hardness range and whether the procedure tolerates higher hardness. |
| Stellite 21 | Cobalt-chromium-molybdenum grade with better toughness and corrosion-wear balance. | Thermal shock, corrosion-wear service, valve trim and specialized components. | Confirm strength/toughness need, customer drawing and heat treatment or deposition requirements. |
Certificate and quality checks
- EN 10204 3.1 MTC where applicable.
- Heat number linked to certificate, marking and dispatch documents.
- Chemical composition checked against grade expectation.
- Hardness or mechanical properties where specified by drawing or procedure.
- Form and surface condition suitable for machining, welding or hardfacing.
Common mistakes
- Asking only for "Stellite" without grade, form or procedure.
- Accepting a certificate without heat traceability.
- Ignoring dilution and weld procedure compatibility in hardfacing.
- Choosing maximum hardness when toughness or machinability is more important.
- Reviewing MTC after delivery instead of before release.
Calculate Stellite theoretical weight
Use the technical calculator for rods, bars, plates and tubes with Stellite 6, 12 and 21 density options.
Send a Stellite enquiry
Send grade, form, dimensions, quantity, certificate requirement and hardfacing/procedure details if applicable.