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Grinding disc for stainless steel

Updated: 21 October 2026

You have dressed a stainless bracket and the grind marks show rust. The usual cause is iron left in the surface by a wheel that was made for ordinary steel. A grinding disc for stainless steel has to say so on its own page. A title that says steel and stainless is a metal claim. The words iron-free are a stronger claim, and they count only when that page uses them. This page follows the four amazon.co.uk packs we kept, on 19 October 2026. Pack order for mild steel stays on [best 125mm grinding discs](/hub/sanders/125mm-grinding-discs/sub/125mm-grinding-discs-best). The full table is the [125mm grinding discs](/hub/sanders/125mm-grinding-discs) comparison. A qualifying purchase can earn a commission at no extra cost to you.

You have dressed a stainless bracket and the grind marks show rust. The usual cause is iron left in the surface by a wheel that was made for ordinary steel.

Our top picks

Tyrolit Tyrolit ONE grinding discs (10)

Best overall

Tyrolit Tyrolit ONE grinding discs (10)
4.1/10about £13.32
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Parweld Parweld GS1260 grinding discs (10)

Rank 2

Parweld Parweld GS1260 grinding discs (10)
8.6/10about £11.30
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Tyrolit Tyrolit BASIC 222860 grinding discs (10)

Rank 3

Tyrolit Tyrolit BASIC 222860 grinding discs (10)
6.6/10about £18.00
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On this page
  1. 1.What goes wrong on stainless
  2. 2.Parweld and Tyrolit ONE
  3. 3.Tyrolit BASIC and Merryland
  4. 4.A disc that does say iron-free

What goes wrong on stainless

Stainless resists rust because of the chromium-rich surface, and a scratch packed with iron from a carbon-steel wheel can rust in that scratch even when the steel underneath is still stainless. Merchants such as SAIC UK separate an INOX grinding disc, described on their guide as free of iron, sulphur, and chlorine, from a general aluminium-oxide disc listed for steel. INOX on a disc is the trade label for that stainless duty. It is not a finish grade. The grit number is a different decision. Coarse aluminium oxide around grit 24–36 is the stock-removal band for taking metal off, which the buying guide covers for mild steel. A coarse INOX wheel can still be grit 30. Finer grit does not, by itself, make a steel wheel safe for stainless. A wire brush or a flap that has already been on mild steel carries the same iron across. Fit it as a 6 mm grinding wheel. Those steps are on how to use a 125mm grinding disc.

Parweld and Tyrolit ONE

Parweld GS1260, £11.30 for ten, is the mild-steel pack. The title says grinding discs for steel, 125 x 6.0 mm, grade A24R-BF. The bullets mention welding seams. Stainless is not named. UK reviews describe grinding welds on what reads as ordinary steel. Do not buy this listing as a stainless disc. Tyrolit ONE, £13.32, says steel and stainless in the title, 125 x 6.0 x 22.23 mm, grit 30. That is a stainless claim in the title, and it is not the phrase iron-free. The file has no review text, a 5.0 from one rating, no maximum rpm, and a grit-material field that says silicon carbide while another field says steel. ISO 6344:1991 is the standard printed there, not EN 12413. You can treat the title as this seller says stainless. You cannot treat it as an iron-free wheel, and you cannot treat the star as evidence.
Tyrolit Tyrolit ONE grinding discs (10)

Testsieger

Tyrolit Tyrolit ONE grinding discs (10)
4.1/10about £13.32
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Tyrolit BASIC and Merryland

Tyrolit BASIC article 222860, £18.00, is the pack with a maker page behind it. Tyrolit’s GB page lists 222860 as form 27, A 30 Q-BF, 125 x 6 x 22.23 mm, for steel and stainless, and it describes 6 mm as rough grinding. The page we used does not say iron-free. The amazon bullets say aluminium oxide, shape 27, EN 12413, and steel and stainless. Eleven UK reviews describe grinding, not a chemistry test. The title also says cutting discs, which is a wording problem, not a stainless certificate. Merryland E31086043, £17.90, names stainless in the title, and the bullets say 125 x 6.0 x 22.23 mm, 12,250 rpm, and EN 12413. The grit field says 60 and the material line says A30R-BF. The review file is the larger problem: 4.6 from 1,074, with many texts about cutting, thin discs, or cut-off wheels. A stainless line that is mostly reviewed as a cutting disc does not tell you whether the wheel is iron-free, or even whether the disc in the box is 6 mm. Skip it as evidence for a stainless grind.

A disc that does say iron-free

Bosch Professional GB sells a PRO Stainless bonded disc for small angle grinders, 125 x 6.4 x 22.23 mm, specification AS 30 S INOX BF, at £3.73 including VAT for one disc. That page says the disc is iron-free. It is not an ASIN in this comparison. That iron-free sentence does not transfer to Tyrolit ONE, Tyrolit BASIC, or Merryland, because those pages did not say it. If the job is only that the title should mention stainless, Tyrolit ONE is the lower pack price of the titles that do, at £13.32. Tyrolit BASIC is the one whose article number matches a GB grinding-wheel page that says steel and stainless. Both Tyrolit files in this set leave rpm blank, so you read the ring.

Common questions

Can one disc do steel and stainless?
Only when that disc’s page says both. Tyrolit ONE and Tyrolit BASIC say steel and stainless. Parweld says steel and does not name stainless. 2-in-1 on these Tyrolit titles means those two metals, not cutting and grinding.
What does INOX mean on a disc?
INOX is the label used for a stainless-duty wheel. SAIC UK describes INOX discs as free of iron, sulphur, and chlorine, and lists a general steel disc separately. Bosch’s PRO Stainless code includes INOX and the page says iron-free. A pack without INOX, and without those words, has not made that claim.
Does Tyrolit BASIC say iron-free?
The GB page for article 222860 says steel and stainless, form 27, A 30 Q-BF. It does not say iron-free on the page we used. The amazon listing says aluminium oxide and EN 12413, and the title also says cutting discs.
Why might stainless rust after grinding?
Iron from a carbon-steel wheel, or from dust and brushes that have already been on mild steel, can sit in the grind marks and rust there. The way to avoid that claim-gap is a disc whose own page says iron-free, kept for stainless.
Should I keep a carbon-steel disc off stainless work?
Yes, if the disc’s page never names stainless. Parweld is that case in this set. A wheel that has already ground mild steel also carries debris onto the next job, so a disc marked for both still wants a clean face before it touches stainless.

Related pages

Grinding discs or cutting discs

125mm grinding discs

Best 125mm grinding discs: Parweld for mild-steel welds

What to check on a 125mm grinding disc before you buy

How to use a 125mm grinding disc on an angle grinder

Sources

Sources taken from the research digest. Listings were checked on 19.10.2026.

  1. HSE — PUWER overview (retrieved 19.10.2026)
  2. HSE — Training and competence (retrieved 19.10.2026)
  3. HSE — HSG17 Safety in the use of abrasive wheels (retrieved 19.10.2026)
  4. oSa — EN 12413 marking note (retrieved 19.10.2026)
  5. Tyrolit GB — BASIC 2in1 rough grinding wheels (retrieved 19.10.2026)
  6. LUKAS — speed table via Kammarton (retrieved 19.10.2026)
  7. Cutwel — guide to grinding discs (retrieved 19.10.2026)