ER4043 and ER5356 are the two most commonly used aluminium filler metals; non-ferrous metals such as cast iron, copper, titanium and nickel alloys each require their own matching or specialist consumables. Correct filler selection prevents cracking and maintains strength and corrosion resistance.
This page covers aluminium alloys and the main non-ferrous metals. For process formats see TIG rods and MIG wire.
Aluminium
What is the best welding consumable for aluminium?
ER4043 and ER5356 are the two most commonly used aluminium filler metals. ER4043 offers excellent weldability, while ER5356 provides higher strength and improved corrosion resistance.
4043 vs 5356 – which should I choose?
ER4043 is suitable for general aluminium fabrication and castings because it offers excellent crack resistance. ER5356 is preferred for marine applications and where greater strength or anodising is required. The correct choice depends on the aluminium alloy and application.
What filler metal should I use for aluminium alloys?
The most common aluminium filler metals are ER4043 and ER5356. ER4043 provides excellent weldability and crack resistance, while ER5356 offers higher strength and improved corrosion resistance. The correct choice depends on the parent alloy and the intended service conditions.
What is 5083 aluminium?
5083 is a high-strength marine-grade aluminium alloy with excellent corrosion resistance, particularly in seawater environments. It is widely used in shipbuilding, transport, pressure vessels and offshore applications. When welding 5083 aluminium, selecting the correct filler metal helps maintain strength and corrosion resistance.
How do you weld 5083 aluminium?
5083 aluminium is commonly welded using TIG or MIG welding with pure Argon shielding gas. ER5356 filler wire is typically recommended as it closely matches the alloy’s strength and corrosion resistance. Ensure the oxide layer is removed before welding and use clean, dedicated aluminium tools.
What is 6082 aluminium?
6082 is a heat-treatable aluminium alloy widely used in structural applications due to its high strength and good machinability. It is commonly found in transport, bridges, cranes and engineering components. 6082 offers good weldability when the correct filler metal is selected.
How do you weld 6082 aluminium?
6082 aluminium can be welded using TIG or MIG welding with ER4043 or ER5356 filler wire, depending on the required mechanical properties. Pure Argon shielding gas is generally recommended. Correct preparation and heat control help minimise distortion and cracking.
Can aluminium be welded without filler wire?
Yes. Some laser and autogenous TIG welds can be completed without filler wire, depending on the joint design and material thickness. However, filler wire is generally recommended to improve strength and bridge joint gaps.
Cast iron
What consumable should I use for cast iron?
Nickel-based electrodes and TIG filler rods are commonly used for cast iron because they reduce cracking and provide good machinability. Correct preheating and controlled cooling are also important.
How do you weld cast iron?
Cast iron requires careful preparation, controlled heat input and slow cooling to reduce the risk of cracking. Nickel-based electrodes or TIG filler rods are commonly used because they provide good machinability and crack resistance. Preheating may be required depending on the component size and application.
Can cast iron be welded?
Yes. Cast iron can be successfully repaired using specialist welding consumables and correct welding techniques. The success of the repair depends on the type of cast iron, the level of preheating and the cooling process. Nickel-based consumables are generally recommended.
Copper, brass and bronze
What consumable should I use for copper?
Copper alloys require specialist copper or silicon bronze filler metals depending on the material and application. Choosing the correct consumable helps achieve good fusion and electrical conductivity.
How do you weld copper?
Copper can be welded using TIG or MIG welding with specialist copper-based filler metals. Because copper conducts heat very efficiently, higher heat input is often required compared with steel. Clean preparation is essential to achieve sound welds.
Can copper be welded?
Yes. Copper is weldable using suitable filler metals and correct welding procedures. TIG welding is commonly used for precision work, while MIG may be suitable for larger fabrications. The correct shielding gas and filler metal are essential for good weld quality.
How do you weld brass?
Brass can be welded, although it is often joined using TIG welding or brazing due to its zinc content. Excessive heat may cause zinc to vaporise, affecting weld quality. Good ventilation or fume extraction is recommended when welding brass.
Can brass be welded?
Yes. Brass can be welded using appropriate techniques and filler metals, although brazing is often preferred for some applications. Heat control is important to minimise zinc loss and maintain joint quality. Selecting the correct process depends on the component and application.
How do you weld bronze?
Bronze is commonly welded using TIG welding with suitable bronze or silicon bronze filler rods. The correct filler metal depends on the specific bronze alloy being repaired or fabricated. Careful heat control helps prevent cracking and distortion.
Can bronze be welded?
Yes. Most bronze alloys can be welded using TIG or MIG welding with compatible filler metals. Cleaning the material thoroughly before welding helps achieve sound, defect-free welds. Always match the filler metal to the parent alloy.
Titanium
What consumable should I use for titanium?
Titanium should be welded using matching titanium filler rods to maintain strength and corrosion resistance. Excellent shielding gas coverage is essential to prevent contamination.
How do you weld titanium?
Titanium is usually welded using TIG welding with matching titanium filler rods. Excellent shielding gas coverage is essential because titanium reacts rapidly with oxygen at elevated temperatures. Trailing shields and back purging are often required for critical applications.
Can titanium be welded?
Yes. Titanium is highly weldable when correct procedures are followed. Maintaining a clean welding environment and complete shielding gas protection is essential to preserve mechanical properties and corrosion resistance. Titanium welding is common in aerospace, medical and chemical industries.
Nickel alloys, Inconel and Monel
What are nickel alloys?
Nickel alloys are engineered materials designed for high-temperature strength and corrosion resistance. They are widely used in power generation, aerospace, chemical processing and offshore industries. Different nickel alloys require matching filler metals to maintain performance.
What consumable should I use for nickel alloys?
Nickel alloys should generally be welded using matching nickel-based filler metals such as Inconel consumables. Correct filler selection helps maintain corrosion resistance and high-temperature performance.
How do you weld nickel alloys?
Nickel alloys should be welded using compatible nickel-based filler metals with controlled heat input and proper joint preparation. Cleanliness is particularly important to avoid contamination. Always follow the recommended welding procedure for the specific alloy.
What is Inconel?
Inconel is a family of nickel-chromium alloys designed for high-temperature and corrosive environments. It is widely used in aerospace, power generation, chemical processing and offshore applications. Specialist nickel-based filler metals are required when welding Inconel.
How do you weld Inconel?
Inconel is typically welded using TIG or MIG welding with matching nickel alloy filler metals. Heat input should be carefully controlled to minimise distortion and maintain material properties. Proper cleaning before welding is essential.
What is Monel?
Monel is a nickel-copper alloy known for its exceptional resistance to seawater and corrosive chemicals. It is commonly used in marine engineering, offshore equipment and chemical processing. Specialist Monel filler metals are recommended for welding.
How do you weld Monel?
Monel is commonly welded using TIG or MIG welding with matching Monel filler metals. Clean preparation and correct shielding gas help achieve strong, corrosion-resistant welds. The welding procedure should be selected according to the alloy grade.
Quick non-ferrous consumable reference
- General aluminium — ER4043
- High-strength / marine aluminium (5083) — ER5356
- 6082 aluminium — ER4043 or ER5356
- Cast iron — nickel-based electrodes / TIG rods
- Copper — copper or silicon bronze filler metals
- Titanium — matching titanium filler rods
- Nickel alloys / Inconel / Monel — matching nickel-based filler metals
Choosing non-ferrous consumables with Weldability SIF
Aluminium and the specialist alloys are unforgiving of the wrong filler metal — cracking, porosity and lost corrosion resistance follow quickly. Weldability SIF supplies aluminium, cast iron, copper, titanium and nickel-alloy consumables across the UK, with technical advice to match the correct product to your alloy. Contact us for support.