Cutting disc material to cut medium carbon steel

[abdulbadii]

What'd be the most suitable/the best cutting disc material to efficiently cut high/medium carbon steel (preferably as thin thickness as possible for that) ?

[Overspeed]

Hello

I use disk for hand grinder in 4 1/2 and 5 inches , the ''stainless steel '' cutting disks work perfectly in carbon steel , they are available in thin thickness 1/10

For more thin fine cut you can also use '' car body repair disk '' 4 and 3 inches which are very thin ( 1 mm in Europe ) but they are not in 7/8 mm ( 22 mm ) central hole so use only on air grinder hight speed spindle

To avoid over heating of the cutting area or high tensile steel / high carbon steel , you can use compressed air to cool down or even water base coolant as in use on metallurgy sample cutting machine as Struers

Be aware as hand cutting disk are reinforced for safety purpose , NERVER use machine cutting disk on hand grinder as they can burst

A lot of brand as Norton have cutting disk in their catalog , but even some generic are not bad for the price

Regards
OS

[mzzj]

For more thin fine cut you can also use '' car body repair disk '' 4 and 3 inches which are very thin ( 1 mm in Europe ) but they are not in 7/8 mm ( 22 mm ) central hole so use only on air grinder hight speed spindle

1mm cutting disks for 4 or 5" angle grinders with 22mm mounting hole are also really common, easily available from any tooling brand or abrasive disk manufacturer.

OP's question sounds again like lazy schoolwork with far too little details. Answer to what material is most suitable is: Aluminium oxide

[Kleinstein]

Diamond discs may wear down relatively fast with steel. So usually one would not use them on steel for more frequent use, unless absolutely needed (exceptionally hard or need super thin / stable disc form).

The normal choice is the alumina / corundum based discs - kind the simple type. It can still be worth to get a good brand, higher grade.
A possible problem with poor quality discs is that they get soft / dull at relatively low temperature due to binder / epoxy with a low glass temperature. An overheated dull disc is real pain and makes a huge difference (e.g. 1/10 the speed) - it is essentially broken and needs to be sharpend again on a hard stone or similar. So it helps to no use the discs very hard and avoid to run them really hot.
The ceramic (compared to crstal) corundum form is more expensive, but usually lasts longer, unless getting too hot.

[Doctorandus_P]

I like the thin (1mm) disks myself. I find it quite weird that 115mm disks exist, and always buy the 125mm.
I would like to buy thin disks for the bigger 180mm grinders, but they are hard to get by for reasonable prices.

Fireballtool did a test of grinding disks, and "discovered" (quite late) that grinding disks get destroyed by vibrations instead of just wearing down. What I do find truly amazing are the prices he apparently pays for those disks. I think he pays USD4 or more for a disk. A normal price for a 125mm grinding disk here in the Netherlands is around EUR1. I've done some shopping at "ecotools", and if you buy 100 disks they cost around 60ct each.

https://www.ecotools.nl/doorslijpschijf-inox

I do not use these disks enough to know if there is a noticable difference between the "metal" and the "Inox" variants when grinding "standard" steel.
I am curious about the very thin 0.6mm disks, but these cost over EUR 2 and they would have to be a hell of a lot better to justify that. They could be useful when heat input in the steel has to be limited. Thinner disks have to grind less material and therefore have a lower heat input. A possible problem with the very thin disks though is that they may be so thin there is just enough thickness for the reinforcement mesh and not enough for the grid itself.

[matskatsaba]

In my experience, the best overall cutting discs are the carbon one with the blue sticker from "pferd".
They last long (compared to ANY other brands, including the fexpensive würth discs), and due to it's material, even if it fails, it doesn't fail catastrophically. Since I'm using those, never had to replace eye protector shattered by disc frags.
Carbon fibre for the win.

[Mike Jung]

The most suitable cutting disc material for cutting high/medium carbon steel would be a thin abrasive disc made of either a ceramic aluminum oxide blend or a diamond blade. Ceramic aluminum oxide blend discs offer high heat resistance and fast cutting speed, while diamond blades are known for their durability and ability to cut through harder materials like carbon steel. The thinness of the disc will allow for more efficient and accurate cuts.

Steel dissolves diamond. Diamond disks are used to cut hard materials and need to be kept stone cold. Almost. Diamond tools perform very badly on soft materials.

[Mike Jung]

What'd be the most suitable/the best cutting disc material to efficiently cut high/medium carbon steel (preferably as thin thickness as possible for that) ?

Lots of variables here.... Is contamination with abrasive particles acceptable ? Heat ? If so, then a thin abrasive disks works. I use then in diameter up to 6" and the thinnest is 0.45mm. Those are specialized cutting disks, cost a bit and can't be used off hand. They're also SLOW and need coolant. If you give some more details I'll be able to sort this out for you as I am in mechanical engineering. Around the house I use 5" angle grinde disks 1mm thick, off hand. Use eye protection as sometimes ( not often ) they crack and a chunk flies off.