Products
ER2594
AWS:
AWS A5.9
Category:
Description
Chemical components
| C | Mn | Si | Cr | Ni | Mo | P | S | Cu | N | Ti |
| ≤0.03 | ≤2.5 | ≤1.0 | 24.0-27.0 | 8.0-10.5 | 2.5-4.5 | ≤0.030 | ≤0.030 | ≤1.5 | 0.20-0.30 | —— |
Product Description
ER2594 is a premium super duplex (austenitic-ferritic) stainless steel solid welding wire compliant with AWS A5.9 and EN ISO 14343-A G 25 9 Mo Cu N standards, specifically designed for welding super duplex stainless steels requiring exceptional corrosion resistance and high mechanical strength. Featuring a nominal composition of 24.0-26.0% chromium, 8.5-10.5% nickel, 3.0-4.0% molybdenum, 1.5-2.5% copper, 0.15-0.30% nitrogen and carbon content ≤0.03%, it delivers superior pitting, crevice and stress corrosion resistance, with a super duplex (austenitic-ferritic) deposited metal structure (ferrite content 40-60%). Common diameters range from 0.8-3.2 mm, packaged in coils (15 kg) or straight sticks (5 kg), operating with DC reverse connection (DCEP) for versatile application in extremely harsh corrosive and high-pressure industrial environments.
Features
· ER2594 offers excellent weldability and all-position performance, with its super duplex structure and nitrogen-copper-added formula ensuring stable arc transfer, minimal spatter, smooth weld bead and easy slag removal, suitable for all welding positions (flat, horizontal, vertical-up, overhead).
· Its smooth surface enables consistent wire feeding, ideal for automatic, semi-automatic and robot welding, reducing wire jamming and improving welding efficiency even in variable fit-up conditions.
· It delivers exceptional tensile strength (≥750 MPa), yield strength (≥550 MPa) and elongation (≥25%), with excellent toughness and resistance to stress corrosion cracking and hydrogen-induced cracking.
· The combination of high chromium, molybdenum, nitrogen and copper enhances superior corrosion resistance to seawater, high-chloride media, acidic and alkaline environments, while its super duplex structure provides higher strength and better corrosion resistance than conventional duplex stainless steels.
· Compatible with GMAW (Ar+(2-5%)CO₂ or Ar+(0.5-3%)O₂) and GTAW (pure Ar) processes, with DC reverse connection (DCEP preferred), it requires pre-drying at 200-300°C for 1 hour for critical applications, ensuring low maintenance and operational flexibility.
Applications
Widely used across diverse industries requiring extreme corrosion resistance and high strength, ER2594 is primarily applied for welding Type 2594 super duplex stainless steels and other super duplex alloys. It is extensively used in offshore oil and gas, marine engineering, and chemical processing industries for fabricating and repairing components such as offshore platforms, deep-sea pipelines, high-pressure heat exchangers and chemical reactors. Suitable for desalination plants, brine treatment equipment, acid and alkali storage tanks exposed to extreme chloride and corrosive environments, it is also applied in pulp and paper manufacturing, wastewater treatment, and petrochemical refineries, delivering reliable performance in the harshest operating conditions.
Company Introduction
Hangzhou Lin'an Dayang Welding Materials Co., Ltd., a professional welding materials manufacturer founded in 1995, adheres to the core philosophy of "Innovative R&D, Precision Manufacturing, Meticulous Service".
With over 30 years of industry expertise, we have continuously increased investment in production upgrading and technological R&D, solidifying our reputation as a trusted supplier of industrial welding consumables globally.
Production Capacity & Product Strength
Equipped with multiple advanced automated production lines, we boast an annual output of 5,000 tons of premium welding products.
Our core portfolio covers nickel-based welding wires, stainless steel welding wires, flux-cored welding wires and high-performance specialty electrodes.
Backed by a professional R&D team with multiple patents, we also provide tailored OEM/ODM welding solutions to meet clients’ diverse application needs.
After-sales service process
FAQS
What is the primary use of ER2594 welding wire?
ER2594 is a high-performance super duplex stainless steel welding wire, mainly used for welding super duplex stainless steel components. It is widely applied in offshore oil and gas, chemical engineering, and other industries that require high corrosion resistance and high strength, such as welding offshore platform structural parts, chemical reaction vessels, and high-pressure pipeline systems.
How does ER2594 achieve excellent corrosion resistance and high strength?
ER2594 has a high chromium content and is added with nitrogen elements, which can form a dense oxide film on the surface to resist corrosion. Its super duplex structure ensures high mechanical strength, and the reasonable ratio of alloy elements effectively improves resistance to stress corrosion cracking and pitting corrosion, adapting to harsh working environments such as high salt and strong acid.
What are the recommended welding parameters for ER2594?
ER2594 is compatible with GMAW and GTAW processes. For GMAW, argon-carbon dioxide mixed gas is recommended as the protective gas; for GTAW, high-purity argon is used. The interpass temperature should be controlled below 150℃, and the weld zone should be kept clean. Pre-drying is not required for general applications, but pre-drying at 200℃ for 1 hour is recommended for critical projects to ensure welding quality.
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