Can WL20 really replace WT20 in my procedure?

In most DC applications yes, with a tip-preparation and parameter check; some qualified procedures require formal re-qualification. We supply sample cartons for your trials and document both designations clearly.

Why do some brands show WL15 as blue?

Historical manufacturer colour schemes differed before ISO 6848 colour coding became the common reference. Our bands follow ISO 6848 and every box is text-labelled, so colour is confirmation, not the only identifier.

Do you stock both gold and blue?

Yes, both are regular stock lines across the standard diameter matrix.

WL15 / WL20 · gold & dark blue tip

WL15 & WL20 Lanthanated Tungsten Electrodes (Gold / Blue)

If you want one electrode family to cover most of the shop, it is lanthanated. WL15 (gold, 1.5% La₂O₃) and WL20 (dark blue, 2.0%) run DC and AC, start easily, carry current well and carry no radioactive element — which is why they are the default substitution route away from red-tip WT20.

Both colours ship from our Baoji stock in the full diameter matrix; mixed gold/blue cartons are a normal order line for us.

Lanthanated tungsten electrode WL20 with dark blue ISO 6848 colour band

Tip colour per ISO 6848.

Specification at a glance

ISO 6848 designations	WL15 (1.40–1.60% La₂O₃) · WL20 (1.80–2.20% La₂O₃)
Colour codes	WL15 gold · WL20 dark blue
AWS A5.12 classes	EWLa-1.5 / EWLa-2 (confirmed on documents)
Current type	DC and AC; broad usable current range
Strength	Easy starts plus tip longevity; one family for most jobs
Diameters	1.0 / 1.6 / 2.0 / 2.4 / 3.2 / 4.0 / 4.8 / 6.4 mm
Lengths	150 mm, 175 mm
Surface	Ground finish, h7, length ±1 mm
Packing	10 pcs tube box; OEM or neutral carton
MOQ	100 pcs, mixed

Photo reference: our shipped boxes are text-labelled “2% Lanthanated (WL20)” — see the quality & inspection page.

Where WL15 / WL20 earns its place

The one-family shop standard

Steel, stainless, nickel alloys, titanium, and AC aluminium in a pinch: WL20 covers the matrix that used to need three boxes.

WT20 replacement programmes

European and safety-driven shops convert procedure-by-procedure. We supply trial cartons of WL15/WL20 next to your remaining WT20 stock so welders compare on real joints.

WL15 vs WL20 in one line

WL15 shines at lower-to-mid current with frequent re-starts; WL20 takes more current and lasts longer at duty. Unsure? Start with WL20 — see how to choose.

Colour caution

Lanthanated band colours have historically varied by maker (blue/gold/black). Ours follow ISO 6848: WL15 gold, WL20 dark blue — and the label on your box states the designation in text, so there is no ambiguity at the bench.

Real stock, photographed as shipped

No studio renders. These are the tube boxes, labels and cartons that leave our Baoji packing room — the same ones your incoming inspection will open.

Stacks of plastic tube boxes with 10 tungsten electrodes each in the packing room — Ground-finish electrodes packed 10 pcs per tube box, stacked for order picking.

Two tube boxes labelled 1.6 mm WL20 lanthanated and 3.2 mm WZ8 zirconiated, 10 pieces ground finish, ANSI AWS A5.12M-98 and ISO 6848 — Export labels state size, type, piece count and the standards: ANSI/AWS A5.12M, ISO 6848.

Row of labelled tungsten electrode tube boxes lined up for pre-shipment counting — Pre-shipment check row: every box counted and matched to the packing list before cartoning.

Neutral white inner boxes hand-marked WL20 1.6 and WZ8 3.2 — Neutral white inner boxes, hand-marked by type and diameter for mixed orders.

Cartons of WL20 1.6 mm and WZ8 3.2 mm electrodes stacked on a table before loading — Cartons stacked and ready: WL20 1.6 mm and WZ8 3.2 mm on one pallet.

Warehouse shelf with blue tube boxes of WZ8 2.4 x 175 mm tungsten electrodes — Tube boxes on the warehouse shelf — WZ8 2.4×175 mm lot, marked and dated.

Shop-floor clip: counting and boxing a lot before export cartoning.

Send your electrode list today

Type, diameter × length, quantity and packing — mixed sizes welcome. You get a specification-confirmed quotation with lead time, normally within 24 hours.

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