AKD-645-O High-Chromium Carbide Wear-Resistant Welding Wire.
A hardfacing wire with high carbide content designed for severe abrasion resistance in high-temperature industrial environments.
Product Overview
AKD-645-O is a high-chromium carbide welding wire used for hardfacing applications in demanding industrial equipment. It is formulated to deliver a wear-resistant deposit with a hardness range of HRC 57-62 after welding.
The wire is suitable for repairing and rebuilding surfaces on components exposed to abrasive and erosive conditions, such as those found in smelting, cement, petrochemical, and related industries. Common applications include calciners, crushers, fans, and other high-wear parts.
Application: Used in smelting, cement, petrochemical industry. Suitable for calciners, crushers, fans, etc.
Key Benefits
High Hardness for Severe Wear Resistance.
The deposited metal achieves a hardness of HRC 57-62, which provides excellent resistance to abrasion and impact in high-wear environments.
High Carbide Content for Long Service Life.
With chromium content between 20.0% and 26.0%, and tungsten between 20.0% and 50.0%, the weld deposit contains a high volume of hard carbides that maintain integrity under extreme service conditions.
Stable Performance in High-Temperature Applications.
The chemical composition supports stability at elevated temperatures, making it suitable for use in calciners and other high-heat industrial equipment.
Suitable for Repair and Build-Up Welding.
AKD-645-O is designed for both repair of worn components and build-up of new wear surfaces, extending the life of critical industrial parts.
Where It Is Used
- Hardfacing of calciners in cement and petrochemical plants.
- Rebuilding wear surfaces on crushers and grinding equipment.
- Repair and protection of fan blades and impellers exposed to abrasive media.
- Wear-resistant overlay on industrial components in smelting operations.
Who It Is For
- Industrial maintenance teams in cement and petrochemical facilities.
- Welding contractors specializing in hardfacing and wear-resistant repairs.
- Equipment fabricators rebuilding high-wear components for industrial clients.
Problems It Solves
- Wear failure in high-abrasion environments due to insufficient hardness or carbide content in the deposited metal.
- Short service life of components like crushers, fans, and calciners caused by inadequate hardfacing materials.
- Inconsistent performance when using non-standard or poorly specified welding wires for wear-resistant overlays.
Specifications
Published by the factory for AKD-645-O. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Element | Content |
|---|---|
| C | 3.50-5.50 |
| Si | 0.50-2.50 |
| Mn | 0.50-2.50 |
| Cr | 20.0-26.0 |
| Nb | 4.0-7.0 |
| W | 20.0-50.0 |
| Other | 2.0-3.0 |
Mechanical property data for this grade is not published on the factory datasheet. Ask our technical team for the test record before you qualify it.
Technical Features
- Chemical composition includes 3.50-5.50% carbon, 0.50-2.50% silicon, 0.50-2.50% manganese, 20.0-26.0% chromium, 4.0-7.0% niobium, and 20.0-50.0% tungsten.
- Deposited metal hardness ranges from HRC 57 to 62.
- Contains 2.0-3.0% other elements, contributing to microstructure stability and wear resistance.
- Designed for use in manual and semi-automatic welding processes for hardfacing applications.
Use Guide
- Select welding parameters based on the base material, thickness, and required build-up rate. Use recommended current and voltage settings to avoid excessive dilution or cracking.
- Preheat the base metal to 200-300 degrees C before welding to reduce the risk of cracking in the hardfacing layer.
- Maintain a controlled interpass temperature below 300 degrees C to preserve the hardness and microstructure of the deposit.
- Clean the surface of the base material thoroughly before welding to remove oil, rust, scale, and moisture.
How It Compares
AKD-645-O is a high-carbide, high-chromium welding wire designed for severe wear resistance. It differs from standard low-alloy wires by its high tungsten and niobium content, which increases carbide formation and hardness. Compared to lower-hardness wear-resistant wires, AKD-645-O offers superior abrasion resistance but requires careful heat control during welding to avoid cracking. It is not intended for structural welding or general-purpose joining.
Related Grades
Other welding wire in the same family.
AKD-645-O Questions
What is the hardness range of the deposited metal?
What elements contribute to the wear resistance of AKD-645-O?
Which industries commonly use AKD-645-O?
Can AKD-645-O be used for both repair and new build-up?
What packing is AKD-645-O supplied in?
Can we test AKD-645-O before placing a production order?
Request a Quotation for AKD-645-O
Send the diameter, the quantity and the destination port. Our technical team replies with packing, pricing and the data you need to qualify the grade.