Products
ERCuAl-A3
AWS:
AWS A5.7
Category:
Description
Chemical components
| Cu | Al | Fe | Mn | Ni | P | Pb | Si | Sn | Zn | Ti | C | S | Other Total |
| bal. | 10.0-11.5 | 2.0-4.5 | — | — | — | 0.02 | 0.10 | — | 0.10 | — | — | — | 0.50 |
Product Description
ERCuAl-A3 is a high-strength aluminum bronze filler metal compliant with AWS A5.7 ERCuAl-A3 standard (equivalent to UNS C62400, ISO24373 Cu6240). Typical composition: approx. 10.0-11.5% Al + 2.0-4.5% Fe, remaining balance copper. It delivers excellent strength, good ductility, high corrosion resistance, and outstanding wear performance. Ideal for welding aluminum bronze of similar composition, overlay welding for bearing surfaces, and piston hard facing applications. Suitable for both MIG and TIG welding processes with DC polarity.
Features
▪ High Strength: Tensile strength approx. 621 MPa (90 ksi), higher than standard aluminum bronze alloys.
▪ Good Ductility: Elongation up to 20%, maintains flexibility under load.
▪ Excellent Wear Resistance: Iron additions enhance hardness (166 BHN) and abrasion resistance.
▪ Superior Corrosion Resistance: Good seawater resistance and general atmospheric corrosion resistance.
▪ Wide Operating Temperature: Suitable up to 300°C, maintains strength at elevated temperatures.
▪ Good Machinability: Weld metal can be machined with appropriate tooling for precise finish requirements.
Applications
▪ Wear Parts Overlay: Piston rings, bearing surfaces, valve seats, mill rolls, breaker blocks requiring high wear resistance.
▪ Industrial Machinery: Impellers, turbine runners, press rams, machine components, cable sheaves.
▪ Chemical Equipment: Pressure vessels, pump housings, valves in corrosive environments.
▪ Shipbuilding: Marine hardware, propeller shafts, seawater system components.
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
Difference between ERCuAl-A3 and ERCuAl-A2?
ERCuAl-A3 contains higher iron (2.0-4.5% vs. 0.5-1.5% in ERCuAl-A2), providing better wear resistance and higher strength (621 MPa vs. 550 MPa). ERCuAl-A2 has better corrosion resistance in reducing acid environments. Choose ERCuAl-A3 for wear applications, ERCuAl-A2 for chemical environments.
Shielding gas for TIG welding?
Pure argon standard; argon-helium mix (25-50% He) increases penetration for thicker sections. Flow rate: 12-18 L/min for TIG, 15-25 L/min for MIG.
Preheat temperature for ERCuAl-A3 welding?
150-300°C depending on thickness. Thin sections (<10mm): 150-200°C; thick sections (>10mm): 200-300°C. Higher preheat reduces cracking risk in restrained joints.
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