Products
ERCuAl-A2
AWS:
AWS A5.7
Category:
Description
Chemical components
| Cu | Al | Fe | Mn | Ni | P | Pb | Si | Sn | Zn | Ti | C | S | Other Total |
| bal. | 8.5-11.0 | 0.5-1.5 | — | — | — | 0.02 | 0.10 | — | 0.02 | — | — | — | 0.50 |
Product Description
ERCuAl-A2 (ECuAl-A2) is a nickel-aluminum bronze alloy filler metal complying with AWS A5.7 ERCuAl-A2 standard. Typical composition: approx. 82-85% Cu + 9-11% Al + 4-6% Ni + 2-4% Fe. Features highest strength among aluminum bronze fillers, excellent wear resistance, superior seawater corrosion resistance, and good cavitation erosion resistance. Suitable for welding nickel-aluminum bronze, dissimilar metal joints, and high-performance applications requiring extreme strength and corrosion resistance.
Features
▪ Highest Strength: Tensile strength approx. 650-750 MPa, premium performance among copper fillers
▪ Excellent Wear Resistance: Outstanding resistance to abrasion, friction, and mechanical wear
▪ Superior Seawater Resistance: Exceptional resistance to seawater and cavitation erosion
▪ Good Toughness: Ni and Fe additions improve impact strength and ductility
▪ High Temperature Performance: Suitable for elevated temperature service up to 300°C
Applications
▪ Marine Industry: Ship propellers, pumps, valves, marine shafts, seawater systems
▪ Chemical Processing: High-performance seawater handling equipment, desalination plants
▪ Heavy Machinery: High-strength bearings, gears, wear plates, industrial components
▪ Dissimilar Metals: Nickel-aluminum bronze-to-steel, high-strength bronze-to-steel joints
▪ Critical Components: Propeller blades, pump casings, valve seats requiring maximum performance
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-A1 and ERCuAl-A2?
ERCuAl-A2 contains Ni and Fe additions (4-6% Ni, 2-4% Fe), higher strength (650-750 MPa), better seawater resistance. ERCuAl-A1 is simpler aluminum bronze (8-10% Al), lower strength (550-650 MPa), more economical. Choose A2 for marine critical applications; A1 for general high-strength requirements.
Preheat temperature for ERCuAl-A2 welding?
200-350°C depending on thickness. Thin sections (<10mm): 200-250°C; thick sections (>10mm): 250-350°C. Higher preheat essential for restrained joints to prevent cracking.
Shielding gas for TIG welding?
Pure argon recommended. For thicker sections, argon-helium mix (25-50% He) improves penetration. Flow rate: 12-18 L/min for TIG.
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