AK-TH650NQII Solid Welding Wire for S450EW Railway Freight Car Steel.
A gas shielded solid welding wire designed for C80 series heavy-duty railway freight cars, offering enhanced atmospheric corrosion resistance compared to standard Q450-NQR1 steel plate.
Product Overview
AK-TH650NQII is a gas shielded solid welding wire formulated for welding S450EW steel plate used in C80 series large axle heavy-duty railway freight cars.
The wire delivers atmospheric corrosion resistance more than 50% higher than that of ordinary Q450-NQR1 steel plate, improving service life in outdoor and harsh environments.
It meets the TB/T 2374 ER65-G standard and is specifically developed for high-performance welding of S450EW base metal in railway freight applications.
Application: Mainly used for welding of steel plate S450EW for C80 series large axle heavy-duty railway freight cars.
Key Benefits
Enhanced Corrosion Resistance
The deposited metal provides atmospheric corrosion resistance more than 50% higher than standard Q450-NQR1 steel plate, reducing maintenance and extending component life.
Compatibility with S450EW Steel.
Chemical composition is tailored to match S450EW base metal, ensuring consistent mechanical and corrosion performance in the weld zone.
Compliant with TB/T 2374 ER65-G.
The wire is supplied to the TB/T 2374 ER65-G standard, meeting the requirements for high-strength, corrosion-resistant welding in railway freight car construction.
Controlled Chemical Composition
Precise levels of Ni (3.0-5.0%), Cr (1.0-2.0%), Cu (0.40%), and low C (0.05%), Mn (1.20%), P (0.015%), S (0.010%), and Si (0.60%) ensure stable weld metal properties and good weldability.
Where It Is Used
- Welding of S450EW steel plate in C80 series large axle heavy-duty railway freight cars.
- Structural welding in railway freight car bodies requiring high atmospheric corrosion resistance.
- Fabrication of heavy-duty rail transport components exposed to outdoor and variable weather conditions.
Who It Is For
- Railway freight car manufacturers and fabricators.
- Welding distributors supplying consumables for heavy-duty rail applications.
- Maintenance teams working on existing C80 series freight cars requiring compatible repair welding wire.
Problems It Solves
- Matching filler metal chemistry to S450EW steel to achieve corrosion resistance performance that exceeds standard Q450-NQR1 welds.
- Providing a single, certified welding wire that meets TB/T 2374 ER65-G for use in critical railway freight car structures.
- Ensuring consistent weld metal properties through controlled chemical composition, especially for Ni and Cr content, to support long-term durability.
Specifications
Published by the factory for AK-TH650NQII. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | TB/T 2374 ER65-G |
| Element | Content |
|---|---|
| C | 0.05 |
| Mn | 1.20 |
| P | 0.015 |
| S | 0.010 |
| Si | 0.60 |
| Cu | 0.40 |
| Ni | 3.0-5.0 |
| Cr | 1.0-2.0 |
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
- Gas shielded solid welding wire for use with CO2 or mixed gas shielding.
- Chemical composition includes C: 0.05%, Mn: 1.20%, P: 0.015%, S: 0.010%, Si: 0.60%, Cu: 0.40%, Ni: 3.0-5.0%, Cr: 1.0-2.0%
- Supplied to TB/T 2374 ER65-G standard.
- Designed for welding S450EW steel plate in C80 series railway freight cars.
Use Guide
- Select wire diameter based on joint thickness and welding position; use recommended shielding gas (CO2 or Ar/CO2 mix) for optimal bead appearance and penetration.
- Clean base metal surfaces of rust, oil, paint, and moisture before welding to prevent porosity and ensure sound welds.
- Store wire in dry conditions; avoid exposure to humidity to prevent hydrogen pickup and potential cracking.
- Follow recommended welding parameters for current, voltage, and travel speed to achieve proper fusion and bead profile.
How It Compares
AK-TH650NQII is specifically formulated for S450EW steel in C80 series freight cars, with enhanced corrosion resistance compared to standard Q450-NQR1. Unlike general-purpose wires, it contains controlled Ni and Cr levels to match the base metal’s performance. It is not intended for use with low-alloy steels outside the S450EW specification or for applications requiring different mechanical properties such as higher tensile strength or impact toughness beyond the standard range.
Related Grades
Other welding wire in the same family.
AK-TH650NQII Questions
What standard does AK-TH650NQII meet?
What is the chemical composition of AK-TH650NQII?
What base metal is this wire designed for?
How does its corrosion resistance compare to Q450-NQR1?
What packing is AK-TH650NQII supplied in?
Can we test AK-TH650NQII before placing a production order?
Request a Quotation for AK-TH650NQII
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.