UNS R30006

Stellite 6

The most widely used cobalt alloy, balancing wear, corrosion and impact resistance.

Material overview

The Cobalt-Based Alloys catalog describes Stellite 6 as follows: The most widely used cobalt alloy, balancing wear, corrosion and impact resistance. Reviewers should evaluate All-purpose hardfacing alloy, good abrasion, corrosion and heat resistance, and tolerates moderate impact. The grade record lists Valve seats and gates, pump shafts and sleeves, screw conveyors, hot-working dies, and engine valves among typical applications. The dataset currently includes 12 property records covering chemical composition, mechanical properties, and physical properties. Standards and form records reference A5.21 and A5.13 and Bar / Rod, Cast Product, and Solid Wire / GTAW-GMAW Wire. Final supply conditions remain subject to specification, inspection, and export-control review.

Key characteristics

  • All-purpose hardfacing alloy
  • good abrasion, corrosion and heat resistance
  • tolerates moderate impact

Typical applications

  • Valve seats and gates
  • pump shafts and sleeves
  • screw conveyors
  • hot-working dies
  • engine valves

Grade names and equivalents

ECoCr-BtradeStellite No.6genericD802equivalent

Technical properties

Typical values are for reference only. Final chemistry, mechanical properties, heat treatment, dimensions, inspection, and documentation are confirmed against the applicable specification and MTC/COA before order acceptance.

Chemical composition

PropertyValueUnitCondition / standard
Cobalancewt%Typical value
Cr27.0-31.0wt%Typical value
W3.5-5.5wt%Typical value
C0.9-1.4wt%Typical value
Ni3.0 maxwt%Typical value
Fe3.0 maxwt%Typical value
Mo1.0 maxwt%Typical value
Mn1.0 maxwt%Typical value
Si1.0 maxwt%Typical value

Mechanical properties

PropertyValueUnitCondition / standard
Hardness39-45 HRCHRCAs cast / as deposited

Physical properties

PropertyValueUnitCondition / standard
Density8.44g/cm3Typical
Melting range1285-1410CTypical

Standards and specifications

Specification for Bare Electrodes and Rods for SurfacingSpecification for Solid Surfacing Electrodes and Rods / Surfacing Electrodes

Forms, applications, and capabilities

Product forms

Industries