ALFA STELLITE 6 COBALT-BASED ALLOY – Welding Rod / Wire
ALFA
STELLITE 6 Wire
1000 In Stock
ALFA Stellite 6 is a cobalt-based, wear-resistant alloy filler material designed for hardfacing and welding applications where excellent resistance to wear, galling, corrosion, impact, and cavitation erosion is required.
Stellite 6 consists of complex carbides dispersed in a cobalt-chromium alloy matrix. It offers good all-round performance and is widely used for general-purpose wear-resistant applications. The alloy retains a reasonable level of hardness up to approximately 500°C (930°F).
The material is suitable for a variety of hardfacing processes, including TIG weld deposition, MMA weld deposition, MIG weld deposition, PTA and laser weld deposition. Typical applications include valve seats and gates, pump shafts and bearings, erosion shields, and rolling couples.
Key Features
- Cobalt-based wear-resistant alloy
- Excellent resistance to wear and galling
- Good corrosion resistance
- Excellent resistance to mechanical and chemical degradation
- Good impact and cavitation erosion resistance
- Retains useful hardness at elevated temperatures
- Suitable for a variety of hardfacing processes
- Available in rod and wire forms
- Suitable for industrial wear-resistant applications
Technical Specifications
| Specification | Details |
|---|---|
| Brand / Make | ALFA |
| Alloy | Stellite 6 |
| Alloy Type | Cobalt-Based Alloy |
| Cobalt (Co) | Base |
| Chromium (Cr) | 27–32% |
| Tungsten (W) | 3–6% |
| Carbon (C) | 0.9–1.4% |
| Other Elements | Ni, Fe, Si, Mn, Mo |
| Hardness | 36–45 HRC |
| Hardness | 380–490 HV |
| Density | 8.44 g/cm³ |
| Melting Range | 1250–1360°C |
| Product Forms | Rod / Wire |
| Application | Wear-Resistant Hardfacing |
Welding / Deposition Processes
Suitable product forms and deposition processes indicated in the technical document include:
- TIG Weld Deposition
- MMA Weld Deposition
- MIG Weld Deposition
- PTA Weld Deposition
- Laser Weld Deposition
Typical Applications
Stellite 6 is suitable for wear-resistant hardfacing applications such as:
- Valve seats
- Valve gates
- Pump shafts
- Bearings
- Erosion shields
- Rolling couples
- Components exposed to wear
- Components exposed to galling
- Cavitation erosion protection
- General-purpose wear-resistant applications
Corrosion Resistance
The technical data states that Stellite 6 primarily undergoes pitting corrosion rather than general mass loss in seawater and chloride solutions. The stated mass loss in seawater is below 0.05 mm per year at 22°C.
Mechanical Properties
| Property | Approximate Value |
|---|---|
| Ultimate Tensile Strength | 850 MPa |
| Yield Stress Rp(0.2%) | 700 MPa |
| Elongation | <1% |
| Elastic Modulus | 209 GPa |
Values shown are for castings at room temperature according to the supplied technical document.
Thermal & Electrical Properties
| Property | Value |
|---|---|
| Thermal Conductivity | 14.82 W/m·K |
| Electrical Resistivity | 106 μ-ohm·cm |
Hot Hardness
The supplied technical data gives the following approximate as-cast hardness values:
| Temperature | Hardness DPH |
|---|---|
| 20°C | 410 |
| 100°C | 390 |
| 200°C | 356 |
| 300°C | 345 |
| 400°C | 334 |
| 500°C | 301 |
| 600°C | 235 |
| 700°C | 155 |
| 800°C | 138 |
| 900°C | 95 |
Specifications / Standards
The technical document lists:
- UNS R30006 – Rod, Castings
- UNS W73036 – Wire
- AMS 5788 – Rod, Wire
- AWS A5.21 / ASME BPVC IIC SFA 5.21 ERCoCr-A – Rod
- AWS A5.21 / ASME BPVC IIC SFA 5.21 ERCCoCr-A – Wire
- AWS A5.13 / ASME BPVC IIC SFA 5.13 ECoCr-A – Electrode
Product Forms
Stellite 6 is documented as being available in:
- Spooled welding wire
- Solid wire
- Cored wire
- Rod
- Powder
- Electrodes
- Finished castings
- Powder metallurgy components
- Additively manufactured components