Model No: Stellite 6

Stellite 6 alloy bar

Stellite 6 is the "all-around champion" among wear-resistant alloys; while it does not aim for the absolute highest hardness, it retains its hardness at high temperatures, resists corrosion and rust, and possesses sufficient toughness to withstand impact.

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Product Introduction

Stellite 6 is a"veteran"among cobalt-based alloys. Its design philosophy is straightforward: cobalt serves as the matrix to ensure high-temperature performance; chromium provides corrosion resistance; tungsten contributes solid-solution strengthening; and carbon forms hard carbide particles. These carbides are embedded within the matrix like pebbles; consequently, during wear, it is the carbides—rather than the matrix itself—that are abraded. As a result, in demanding applications such as valve seating surfaces, high-temperature bearings, and pump sleeves, its wear resistance lifetime is anywhere from several to several dozen times longer than that of standard stainless steel.

Chemical Composition

Material Type	C	Mo	S	Mn	Si	Ni	Cr	W	Fe
UNS R30006 / Stellite 6	0.9-1.4	≤1.0	≤0.02	≤1.0	≤2.0	≤3.0	27.0-31.0	4.0-6.0	≤3.0

Mechanical and Physical Properties

(Stellite 6: Cast / Forged)

Tensile Strength	Yield Strength (0.2%)	Elongation	Impact Toughness	Elastic Modulus	Hardness (As-cast)	Thermal Conductivity (20°C)
690-1000 MPa	480-700 MPa	<5% (As-cast)	5-15 J/cm²	~220-230 GPa	HRC 40-47	14.8 W/m·K

Standards and Grades

For Stellite 6 alloy bar, we need to verify that the following details match:

Standard / Grade	Explanation
UNS R30006	Most Common Unified Number
AWS A5.13 / A5.21 ERCoCr-A	Hardfacing Wire/Electrode Standard
AMS 5387	Casting Standard
ISO CoCr28	Equivalent International Standard Grade

Application

Stellite 6 typical applications include:

Valve Industry: High-temperature, high-pressure valve seats, valve cores, and sealing surfaces (in power plants, petrochemical facilities, and nuclear power stations).
Aerospace: Engine valves, sealing rings, and guide vane shrouds.
Energy & Power: Wind turbine blades, pump sleeves, and wear-resistant components for boiler sootblowers.
Petrochemicals: Bearings for drilling tools, mechanical seals for chemical pumps, and agitator blades.
Manufacturing/Tooling: Hot shear blades, extrusion dies, and injection molding machine screws.
Glass/Plastics Molding: Glass molds and inserts for plastic molding dies.

In summary: Wherever high temperatures, abrasion, and corrosion coexist, Stellite 6 stands as a proven and mature choice, validated by decades of field experience.

Lork Group: Product Forms and Specifications

Key Inquiries When Purchasing Supply Stellite 6 Alloy Bar:

Specifications: Diameter, Length
Form: Forged Bar (high density, uniform microstructure), Cast Bar (flexible shapes)
Condition: As-cast, Solution-treated (softened for ease of machining), or Aged (peak hardness)
Surface Finish: Black (As-forged/As-cast), Turned, Ground
Certification Requirements: Is third-party inspection required?
Reference Specifications (Common):
Forged Bar Diameter: Φ10 – 200 mm
Cast Bar Diameter: Φ3.2 mm, Φ4.0 mm, Φ4.8 mm, etc. (for hardfacing applications)
Length: Typically 300 – 1000 mm
Recommendations for Condition Selection:
If complex shapes require subsequent machining by the user → Recommended: Solution-treated condition (reduced hardness facilitates processing)
If intended for direct hardfacing or use as wear-resistant components → Recommended: Aged or As-cast condition