Sells Billets & Blooms, Slabs, Cold Rolled, Abbrasive + Polishing products +8
Buys Coal, Alloy steel, Slabs, Cold Rolled +8
Buys Coal, Alloy steel, Slabs, Cold Rolled +8
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Hard grains — aluminium oxide, silicon carbide, zirconia, ceramic, CBN and diamond — bonded into wheels, coated onto belts and discs, or used loose for blasting, to cut, grind, finish and polish steel. Every fabrication shop, steel service centre and mill grinding line consumes them, from cut-off discs and flap discs to large grinding wheels for billets and rolls.
An abrasive tool is defined by its grain, its grit size and its bond. Aluminium oxide is the general grain for steel; zirconia alumina and sintered ceramic grains cut faster and last longer under pressure; silicon carbide is for non-ferrous metals, stone and cast iron; and the superabrasives, cubic boron nitride (CBN) and diamond, grind hardened tool steels and carbides. The grit number gives the grain size — a lower number is coarser — and the bond (vitrified, resin, rubber, metal) and hardness grade decide how readily grains break away to expose fresh cutting edges.
Bonded abrasives — grinding wheels, depressed-centre discs and reinforced cut-off wheels — are formed and cured or fired; coated abrasives carry a single layer of grain glued to paper, cloth or fibre backing as belts, discs and sheets; flap discs combine overlapping coated flaps on a hub; and non-woven abrasives finish and polish. Polishing compounds and buffs bring stainless steel to a bright or mirror finish.
A thin reinforced cut-off wheel turning at 80 m/s stores a great deal of energy, so safety standards govern how abrasive products are made, marked (maximum speed, dimensions, expiry date for resin-bonded wheels) and used. Stainless steel needs contamination-free (iron-, sulphur- and chlorine-free) abrasives, so that grinding does not seed rust on the finished surface.
The GCC's fabrication, oil and gas, shipbuilding and construction sectors use large volumes of discs and wheels, almost all imported from Europe, China, Japan, Korea and India through industrial distributors. Blast-cleaning abrasives — steel shot and grit, garnet, aluminium oxide and slag abrasives — are used for surface preparation before painting.
| Region | Standard | What it covers |
|---|---|---|
| International | ISO 525 ISO |
Bonded abrasive products — general requirements, designation and marking |
| International | ISO 603 ISO |
Bonded abrasive products — dimensions (multi-part) |
| Europe | EN 12413 CEN-CENELEC |
Safety requirements for bonded abrasive products |
| Europe | EN 13743 CEN-CENELEC |
Safety requirements for coated abrasives |
| Europe | EN 13236 CEN-CENELEC |
Safety requirements for superabrasives |
| USA | ANSI B7.1 ANSI |
Safety requirements for the use, care and protection of abrasive wheels |
| International | ISO 6344 ISO |
Coated abrasives — grain size analysis (P-grit sizes) |
| Europe | FEPA F and P standards | Grit size standards for bonded (F) and coated (P) abrasive grains |
| International | ISO 11126 ISO |
Specifications for non-metallic blast-cleaning abrasives (multi-part) |
Grade equivalents and the standards bodies: Steel grades & standards
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