With excellent welding performance, 4043 aluminum sheet is widely used in welding filling, lightweight structural parts, brazing,etc. We offer cheap price for bulk orders. Learn more.
4043 aluminum plate is a typical representative of the 4000 series aluminum alloy (aluminum-silicon alloy). Its core feature is its high silicon content. Due to its excellent welding performance and formability, it is widely used in welding filling, lightweight structural parts and other scenarios.
Al | Si | Fe | Cu | Mn | Mg | Zn | Ti | Others each | Others total |
Remainder | 4.5-6.0 | ≦0.8 | ≦0.3 | ≦0.05 | ≦0.05 | ≦0.1 | ≦0.2 | 0.05 | 0.15 |
Casting repair and low-pressure casting
Welding wire and filler materials
Heat exchanger systems
Brazing processes
Low Melting Point: Approximately 20-80°C lower than pure aluminum (melting point 660°C), this reduces heat input during welding and reduces base material deformation.
Good Fluidity: In the molten state, silicon improves the alloy's fluidity, resulting in full weld filler and aesthetically pleasing finish, while reducing defects such as porosity and cracks.
Strong Compatibility: Suitable as a welding filler material (such as welding wire and electrodes) for welding a variety of base materials, including 1000 series pure aluminum, 3000 series aluminum-manganese alloys, and 6000 series aluminum-magnesium-silicon alloys.
Excellent Plasticity: The annealed (O state) elongation can reach over 20%, making it easily adaptable to cold working processes such as bending, stamping, and stretching, making it suitable for the production of complex, lightweight components.
Good Castability: In addition to being rolled into aluminum sheet, 4043 is also commonly cast into parts (such as small structural and decorative components). The addition of silicon improves mold filling during casting.
Strength: This alloy is classified as a "low-strength aluminum alloy," with an annealed tensile strength of approximately 120-140 MPa and a hardness (HV) of approximately 35-45. It cannot be strengthened by heat treatment (no precipitation hardening effect), making it suitable for applications where strength requirements are low.
4. Excellent corrosion resistance
The aluminum substrate's inherent oxide film and low impurity content provide excellent corrosion resistance in atmospheric and freshwater environments, but it is not suitable for long-term exposure to strong acids and bases.