AKD-420 Martensitic Flux-Cored Wire for Wear-Resistant Valve Surfacing.
A 13% chromium martensitic flux-cored wire designed for hard surfacing of steam valves, safety valves, and wedge valves, delivering high hardness and corrosion resistance in demanding service environments.
Product Overview
AKD-420 is a flux-cored wire for manual or semi-automatic surfacing welding, formulated with 12.0-14.0% chromium to provide corrosion and wear resistance in high-stress applications.
The wire produces a martensitic microstructure with a hardness range of HRC 51-56 in the as-deposited condition, making it suitable for components exposed to abrasive and erosive conditions.
It is specifically recommended for hard surfacing of steam valves, safety valves, wedge valves, and similar components where surface integrity and durability are critical.
Application: Martensitic surfacing flux-cored wire with 13% chromium, corrosion resistant and wear-resistant. It is suitable for hard surface welding of steam valves, safety valves, wedge valves and other components.
Key Benefits
High Hardness and Wear Resistance.
The deposited metal achieves a hardness of HRC 51-56, providing resistance to abrasion and erosion in high-wear valve components.
Corrosion Resistance from Chromium Content.
With 12.0-14.0% chromium, the weld metal offers enhanced resistance to corrosion in aggressive environments, particularly in steam and high-temperature service.
Martensitic Structure for Toughness.
The martensitic microstructure ensures good mechanical stability and resistance to cracking under thermal and mechanical stress during service.
Suitable for Valve Component Repair and Build-Up.
Designed for surfacing applications on steam valves, safety valves, and wedge valves, where surface durability and dimensional restoration are required.
Where It Is Used
- Hard surfacing of steam valves.
- Repair and build-up of safety valves.
- Wedge valve surface hardening.
- Wear-resistant overlay on high-stress valve components.
Who It Is For
- Valve manufacturers and repair shops.
- Power plant maintenance teams servicing steam system components.
- Oil and gas contractors working on high-pressure valve systems.
- Fabricators performing surfacing on critical valve parts.
Problems It Solves
- Wear and erosion damage on valve surfaces due to abrasive media or high-velocity flow.
- Corrosion attack in high-temperature and high-pressure environments.
- Need for a consistent, high-hardness surfacing material with proven chromium content.
Specifications
Published by the factory for AKD-420. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Element | Content |
|---|---|
| C | 0.20-0.35 |
| Si | 1.5 |
| Mn | 1.5 |
| S | 0.012 |
| P | 0.017 |
| Cr | 12.0-14.0 |
| Other | ≥1.5 |
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
- Flux-cored wire with 12.0-14.0% chromium for corrosion and wear resistance.
- Deposited metal hardness of HRC 51-56 in as-deposited condition.
- Chemical composition includes 0.20-0.35% carbon, 1.5% silicon, 1.5% manganese, 0.012% sulfur, 0.017% phosphorus, and other elements totaling ≥1.5%
- Formulated for manual or semi-automatic surfacing welding of valve components.
Use Guide
- Select welding parameters based on the base metal thickness, joint configuration, and required deposition rate.
- Ensure the base metal surface is clean and free of oil, rust, and scale before welding.
- Use appropriate shielding gas as specified in the welding procedure, if applicable.
- Control interpass temperature to avoid excessive grain growth or cracking in the heat-affected zone.
How It Compares
AKD-420 is a martensitic flux-cored wire with 13% chromium, designed for hard surfacing. It differs from austenitic or ferritic flux-cored wires in its high hardness and wear resistance. It is not intended for general-purpose welding but for specific surfacing applications where surface durability is critical.
Related Grades
Other welding wire in the same family.
AKD-420 Questions
What is the chromium content in AKD-420?
What hardness range does the deposited metal achieve?
What are the key chemical elements in AKD-420?
Can I get technical data and packaging details before ordering?
What packing is AKD-420 supplied in?
Can we test AKD-420 before placing a production order?
Request a Quotation for AKD-420
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.