5087 is about 4.5% Magnesium Aluminum filler metal added micro Zr which acts as grain-refiner, has high strength, excellent corrosion resistance, better bending property and the excellent resistance of hot cracking sensitivity, recommended for welding the wrought Aluminum alloys of 5000 series, 6000 series and 7000 series, such as 5083,6005 A, 6082,7005,7020, etc. Mainly used in ships, offshore facilities, storage tanks, rail transportation, high-speed trains, automobiles and other industries.
ER5087 Magnesium Aluminum Welding Wire is a high-performance aluminum-magnesium welding material with corrosion resistance and welding strength. It is widely used in scenarios requiring high strength and corrosion resistance such as marine, aerospace, automotive, and construction industries.
Product Features:
Alloy Composition:
ER5087 is mainly composed of aluminum and magnesium, and contains trace amounts of other alloying elements such as manganese and chromium, which can improve the strength and corrosion resistance of the weld.
Corrosion Resistance:
This welding wire is particularly suitable for metal structures in contact with seawater or other corrosive environments.
High Welding Strength:
Provides good mechanical properties and is suitable for structural parts with high strength requirements.
Ease of Use:
It has a stable arc during welding, is easy to operate, and is suitable for a variety of welding equipment.
Scope and Application Areas:
Marine Engineering:
Used for welding of shipbuilding, offshore oil platforms, and port equipment. This welding wire exhibits excellent corrosion resistance in marine environments.
Aerospace:
Suitable for lightweight structural welding in the aerospace field to ensure that the material maintains strength and reliability under harsh conditions.
Automobile manufacturing:
Applied to the welding of lightweight car body parts, such as aluminum alloy frames and wheels, providing high-strength connections and reducing weight.
Construction industry:
In the construction industry, it can be used for welding aluminum alloy structures, such as curtain walls, window frames, etc.
Tank and container manufacturing:
Used to manufacture aluminum tanks and containers for storing corrosive liquids or gases.
Suitable welding methods:
Applicable to TIG (tungsten inert gas welding) and MIG (metal inert gas welding) welding processes.
Especially suitable for complex welding projects that require multiple welding and cannot be easily deformed.
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1. Factors affecting core parameters
Current/voltage
MIG process: higher current (180-250A) and voltage (18-24V) are required to ensure the penetration depth, but excessive current should be avoided to cause burn-through (pulse MIG is recommended for thin plates).
TIG process: DC positive connection (DCEN), current range 150-200A, more precise control, suitable for thin plates or precision welding.
Wire feeding speed (MIG)
Positively correlated with current, usually 4-8m/min, needs to match the fluidity of the molten pool (magnesium and aluminum are easy to oxidize, and need to be slightly faster than steel welding wire).
Shielding gas
Recommended mixed gas: Ar+30-50% He (He increases heat input and improves penetration depth); pure Ar can be used for thin plate TIG.
Flow rate: 15-20L/min (MIG requires higher flow to prevent air holes).
2. Optimization of process adaptability
Advantages of pulse MIG:
Reduce heat input, reduce magnesium evaporation and deformation, suitable for medium and thick plates (such as automobile chassis).
Parameter example: base current 80A/peak current 220A, frequency 50-100Hz.
Advantages of TIG:
No spatter, beautiful welds, suitable for precision aerospace parts (such as cabin sealing welds).
Requires high-frequency arc initiation and delayed gas stop (to protect the magnesium-aluminum molten pool).
Comparison Aspect | Pulse MIG | TIG |
---|---|---|
Heat Input | Medium (controlled pulse reduces peak heat) | Low (ideal for thin plates, small HAZ) |
Welding Speed | Fast (suitable for automation and mass production) | Slow (manual operation, precision-oriented) |
Penetration Control | Deeper (with He mixed gas assistance) | Shallow and uniform (requires multi-pass for thick plates) |
Equipment Complexity | High (requires pulse power source, wire feeder) | Lower (but needs skilled operator) |
Common Defect Prevention | Porosity (requires strict gas shielding) | Cracking (preheat to 120°C reduces cold cracking risk) |
Typical Applications | Automotive structural parts, medium-thick plate mass production | Aerospace precision components, thin plate repairs |
Material pretreatment
Thorough cleaning (acetone degreasing + stainless steel brush to remove oxide film), welding in an environment with humidity <60%.
Parameter debugging steps
MIG: first fix the wire feeding speed and adjust the current until the molten pool is stable;
TIG: start from low current and observe the wettability of the molten pool.
Process selection decision tree:
Mass production/medium and thick plates → pulse MIG (high efficiency);
Precision/thin plates/repair welding → TIG (quality first).
Automobile Lightweighting: A car company uses pulsed MIG (ER5087+Ar/He) to weld magnesium-aluminum door frames, increasing welding speed by 30% and deformation <1mm.
Aerospace tanks: TIG process is used to weld 2mm thick magnesium-aluminum alloy, and copper pads are added on the back to achieve zero-defect X-ray inspection.