STELLITE® Alloy 1 is a cobalt-based superalloy known for its exceptional wear resistance, high strength at elevated temperatures, and corrosion resistance. This article provides a comprehensive introduction to STELLITE® Alloy 1, detailing its chemical composition, mechanical properties, performance characteristics, industry applications, shapes, sizes, production standards, welding, processing, polishing, heat treatment, advantages, disadvantages, and comparisons with similar materials.
Chemical Composition
STELLITE® Alloy 1 primarily consists of cobalt with significant additions of chromium, tungsten, and carbon for enhanced mechanical properties and wear resistance.
STELLITE® Alloy 1 offers outstanding performance in demanding conditions:
Wear Resistance: Exceptional resistance to abrasion, erosion, and metal-to-metal wear, making it suitable for components exposed to high-stress wear environments.
Corrosion Resistance: Good resistance to oxidation and corrosion in high-temperature environments, including acids and alkalis.
High Temperature Strength: Maintains high strength and hardness at elevated temperatures, up to approximately 1200°F (650°C).
Industry Applications
STELLITE® Alloy 1 is widely used in various industries for its wear and corrosion resistance properties:
Industry Sector
Applications
Aerospace
Aircraft engine components, turbine blades, and wear-resistant coatings.
Oil and Gas
Valve seats, pump components, and drilling tools exposed to abrasive environments and corrosive fluids.
Power Generation
Gas turbine blades, boiler components, and steam turbine seals requiring high wear resistance and durability.
Industrial Machinery
Cutting tools, extrusion dies, and wear plates in manufacturing equipment.
Shapes, Sizes, and Production Standards
Product Form
Shapes Available
Sizes Available
Production Standards
Bars
Round bars, square bars
Diameter: 0.25″ – 6.0″ (6.35mm – 152.4mm)
ASTM A732
Plates/Sheets
Plates, Sheets
Thickness: 0.025″ – 1.000″ (0.64mm – 25.4mm)
ASTM A732
Welding Rods
Rods
Diameter: 0.125″ – 0.500″ (3.18mm – 12.7mm)
AWS A5.13
Standards and Corresponding Grades
STELLITE® Alloy 1 adheres to industry standards and grades for quality assurance:
Country/Region
Standard/Grade
USA
AMS 5387
Europe
DIN 2.4778
Germany
CoCr28W15Ni
France
ST 1
Welding, Processing, Polishing, Heat Treatment
Process
Details
Welding
Can be welded using conventional methods such as TIG and MIG welding with preheating and post-weld heat treatment to maintain properties.
Processing
Machinable using carbide tooling, although high cobalt content requires slower speeds and heavy feed rates.
Polishing
Capable of achieving high polish finishes for improved wear resistance and aesthetic appeal.
Heat Treatment
Annealing at 1800°F (980°C) followed by rapid quenching optimizes material properties and reduces residual stress.
Advantages and Disadvantages
Aspect
Details
Advantages
High wear resistance, excellent strength at elevated temperatures, good corrosion resistance, and suitability for extreme environments.
Disadvantages
Higher cost compared to conventional materials, requires specialized machining and welding techniques due to high cobalt content.
Similar Products
Product Name
Comparison
STELLITE® Alloy 6
Similar in composition but higher tungsten content, offering superior resistance to galling and abrasion.
STELLITE® Alloy 12
Lower carbon content, providing improved weldability and machinability compared to Alloy 1.
Comparison of Similar Products
Property/Feature
STELLITE® Alloy 1
STELLITE® Alloy 6
STELLITE® Alloy 12
Cobalt Content (%)
58.0 – 64.0
54.0 – 62.0
31.0 – 35.0
Chromium Content (%)
27.0 – 32.0
27.0 – 32.0
8.0 – 10.0
Tungsten Content (%)
3.0 – 5.0
8.0 – 10.0
0.5 max
Hardness, Rockwell C (HRC)
42 – 48
48 – 55
28 – 36
Applications
Wear-resistant coatings, turbine components
Valve components, extrusion dies
Welding electrodes, pump parts
This comprehensive article offers a detailed introduction to STELLITE® Alloy 1, highlighting its chemical composition, mechanical properties, performance characteristics, industrial applications, available forms and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and comparisons with similar alloys. Engineers, manufacturers, and professionals seeking high-performance materials for wear and corrosion resistance applications will find this information invaluable for selecting the appropriate alloy for their specific needs.
