Stellite 12

Stellite 12 is a high-hardness cobalt-chromium wear-resistant alloy. Compared with Stellite 6, it contains higher levels of carbon and tungsten, providing greater hardness and wear resistance. It is particularly suitable for components exposed to severe abrasion, metal-to-metal wear, and elevated temperatures.

Appearance & Properties

Color: Silver-gray to bright silver-gray

Density: Approx. 8.4–8.6 g/cm³

Hardness: Typically approx. 44–51 HRC, depending on product form and condition

Wear Resistance: Excellent

Corrosion Resistance: Excellent

High-Temperature Performance: Excellent

Machinability: Very Difficult

Anti-Galling Performance: Excellent

Oxidation Resistance: Good

Magnetism: Generally somewhat magnetic

Surface Finishes: Grinding, polishing, blasting, precision grinding, etc.

Typical Applications

Stellite 12 is widely used in oil and gas, energy, chemical processing, aerospace, industrial cutting, and high-temperature machinery.

Typical parts include industrial cutting blades, valve seats, valve components, sealing rings, nozzles, wear plates, pump components, and high-temperature wear-resistant precision parts.

Advantages

• Higher wear resistance than Stellite 6

• Retains high hardness at elevated temperatures

• Excellent anti-galling and friction resistance

• Good corrosion and oxidation resistance

• Particularly suitable for severe-wear applications

Limitations

• Very difficult to CNC machine

• Generally lower toughness than Stellite 6

• High cutting-tool wear and machining costs

• Not ideal for components requiring high impact toughness