Skip to content

Filler rod · aluminum

STAHLWERK ER4043 (AlSi5) TIG rods Ø 2.4 × 500 mm, 2 kg

Aluminum filler for TIG: the same alloy family as the MIG wire, in a form you feed by hand.

STAHLWERK ER4043 (AlSi5) TIG rods Ø 2.4 × 500 mm, 2 kg, product photograph

STAHLWERK ER4043 (AlSi5) TIG rods Ø 2.4 × 500 mm, 2 kg

Aluminum filler for TIG: the same alloy family as the MIG wire, in a form you feed by hand.

Alloy
ER4043 (AlSi5)
Diameter
2.4 mm (0.09 in)
Length
500 mm (19.7 in)
Weight
2 kg (4.4 lb)
Amazon reference
B07YYD1WX7
EAN
4260294086517
  • ER4043 flows well and resists cracking — the general-purpose aluminum filler
  • 2.4 mm (0.09 in) matches the tungsten size most AC work uses
  • Aluminum oxidizes in storage: rods need keeping clean and dry

Best for: Aluminum TIG work on an AC or AC/DC machine

Search Amazon for this model

Specifications

Alloy
ER4043 (AlSi5)
Diameter
2.4 mm (0.09 in)
Length
500 mm (19.7 in)
Weight
2 kg (4.4 lb)
Amazon reference
B07YYD1WX7
EAN
4260294086517

Same family as the MIG wire

ER4043 appears twice on this site — as MIG wire and as TIG rod — because it is the general-purpose aluminum filler in both processes. Silicon-alloyed, forgiving, crack-resistant.

Cleanliness is the technique

More aluminum TIG welds are ruined by contamination than by heat control. Clean base metal with a stainless brush kept only for aluminum, clean the rod, and weld promptly.

Sources

Every figure above comes from the manufacturer’s published specification for this reference. Fields the listing does not publish are left out rather than estimated. Market availability was verified per market on the EAN.

The questions welders ask

How do I choose filler rod diameter?

Match it roughly to the material thickness and to the tungsten you are running. On 2 to 4 mm (0.08 to 0.16 in) aluminum with a 2.4 mm (0.09 in) tungsten, a 2.4 mm (0.09 in) rod feeds naturally and adds metal at a sensible rate. Too thin a rod means constant feeding and a cold weld; too thick chills the pool each time it touches.

Do the rods need cleaning before use?

Yes. Aluminum grows an oxide skin in storage and picks up grease from handling, and both end up as porosity or black soot in the weld. Wipe rods with acetone before a session, keep them in a tube rather than loose in a drawer, and handle them with clean gloves.

Welders this fits

More tig consumables

  • STAHLWERK WC20 grey Ø 1.6 × 175 mm, 10 pieces, product photograph

    STAHLWERK WC20 grey Ø 1.6 × 175 mm, 10 pieces

    Ceriated tungsten in 1.6 mm: the combination that strikes reliably at very low current.

    Type
    WC20, ceriated (grey)
    Diameter
    1.6 mm (0.06 in)
    Length
    175 mm (6.89 in)
    Quantity
    10 pieces
    Amazon reference
    B07LCS95JR
    EAN
    4260294084049
    • Ceriated tungsten starts easily at low current, where other types splutter
    • 1.6 mm (0.06 in) is the right diameter for thin stainless and small work
    • 1.6 mm (0.06 in) overheats and balls up if pushed past roughly 120 A

    Best for: Thin stainless, small brackets and any work under 100 A

    Search Amazon for this model
  • STAHLWERK WP-26 consumables set, 36 pieces, product photograph

    STAHLWERK WP-26 consumables set, 36 pieces

    The parts that wear out on a TIG torch, in every size, in one box.

    Fitment
    WP-26 torch
    Contents
    36 pieces — collets, collet bodies, gas nozzles, back caps
    Sizes
    Multiple tungsten diameters
    Amazon reference
    B07L7WM991
    EAN
    4260294083929
    • Every wearing part in one box, in several diameters
    • WP-26 is one of the most common fitments, so parts are easy to replace later
    • A set includes sizes you will never use

    Best for: A new TIG owner who does not yet know which sizes they need

    Search Amazon for this model
  • Alffun TIG torch kit with back caps, collet bodies and alumina cups

    Alffun 17-piece WP-17/18/26 kit

    The smallest and cheapest kit on this shelf, for the larger WP-17/18/26 torches — on a listing whose own itemization falls three short of its title.

    Amazon reference
    B07HV27VV3
    EAN
    0192543200211
    • Names the torch series precisely — WP-17, WP-18, WP-26, and the Lincoln PTA and Miller Diamondback equivalents
    • Covers the three parts that fail: back cap, collet body and ceramic cup
    • The title says 17 pieces; the contents bullet lists 3 back caps, 6 collet bodies and 5 cups, which is 14

    Best for: Topping up a WP-17, 18 or 26 torch with the three parts that actually break

    ≈ $22
    Check price on Amazon

Elsewhere in the workroom

  • STAHLWERK Welding magnets, 4 × 22.6 kg, product photograph

    STAHLWERK Welding magnets, 4 × 22.6 kg

    Nearly double the hold of the cheap sets — which changes what section they can position.

    Quantity
    4 magnets
    Hold
    22.6 kg (49.8 lb) (50 lbs) each
    Amazon reference
    B0DJT1DPDJ
    EAN
    4262452492925
    • 22.6 kg (49.8 lb) holds heavier section steady while you tack
    • The only magnet set here live on all six markets
    • Four magnets rather than six, at a similar price

    Best for: Positioning heavier box section and plate before tacking

    Check price on Amazon
  • STAHLWERK Worker 3-in-1 True Colour, product photograph

    STAHLWERK Worker 3-in-1 True Colour

    A True Color lens: the green cast disappears and you can see what the weld pool is actually doing.

    Type
    Auto-darkening, True Color
    Processes
    MIG/MAG, TIG and MMA
    Amazon reference
    B0DQ3Y6CH8
    EAN
    4262452493496
    • True Color removes the green cast, so the pool and the filler are distinguishable
    • Rated for all three processes, including TIG
    • Switching time and optical class are not published

    Best for: Anyone welding TIG or stainless, where seeing the pool clearly is the whole job

    Search Amazon for this model
  • STARK Rutile all-round Ø 3 × 350 mm, 5 kg, product photograph

    STARK Rutile all-round Ø 3 × 350 mm, 5 kg

    A hundred and eighty-five rods in a box — the format for a project rather than a repair.

    Type
    Rutile, all-round
    Dimensions
    Ø 3 mm (0.12 in) × 350 mm (13.8 in)
    Quantity
    5 kg (11 lb), approximately 185 rods
    Amazon reference
    B01N07QIID
    EAN
    4402300500550
    • 185 rods: enough for a gate, a trailer repair or a season of practice
    • Rutile all-round, so it strikes easily and works in most positions
    • Even rutile rods absorb moisture — a 5 kg (11 lb) box needs dry storage

    Best for: A project with a lot of welding in it, at 5 mm (0.20 in) and above

    Check price on Amazon

All tig consumables