GRADE CHART

Castlebar – Grade Charts

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CASTLEBAR

Code
ISO

Code
WC CO Grain

Size
Hardness

(HRa)
TRS

(MPa)
Density

(g/cm³)
8805 K40-K50 88.0% 12.0% Ultra-Fine 92.5 4500 14.20
Finishing and roughing of steels with hardness between 40 and 55 HRC, steels for surface treatments, nickel, and nickel alloys. Also suitable for manufacturing with micro end mills on steel applications.
9105 K20-K30 91.5% 8.5% Ultra-Fine 93.8 4700 14.50
Suitable for finishing manufacturing high speed steels with hardness between 55 and 65 HRC as HS and tempered steels. Suitable for high speed milling and drilling of cast iron, non-ferrous metals, light alloys, compaistes, laminates of paper, plastic, graphite.
9008 K20 90.0% 10.0% Sub-micron 92.0 3500 14.50
Most versatile grade for steel manufacturing including non tempered steels with hardness up to 40 HR. Also suitable for aluminum alloys, aluminum magnesium, cast iron, non-ferrous materials.
1008 K20 90.0% 10.0% Sub-micron 92.1 3700 14.42
Premium high performance, impact and TRS intended for Aerospace & Defense applications requiring extended life and durability for steel manufacturing including non tempered steels with hardness up to 40 HR. Also suitable for aluminum alloys, aluminum magnesium, cast iron, non-ferrous materials.
9208 K40-K50 88.0% 12.0% Sub-micron 91.1 3740 14.22
Stainless steel manufacturing, nickel alloys, titanium alloys, special alloys (nimonic, inconel, monel, hastelloy), brass, bronze, and roughing and drilling tender steels with irregular surfaces.
9408 K10 94.0% 6.0% Sub-micron 93.4 2600 14.80
Number one choice for diamond coating. Also suitable for drilling and milling of plastic composites, PCB, ceramics, woods in particular hard woods and composite woods (MDF) and steels.
9412 K20 94.0% 6.0% Fine 92.0 2206 14.90
Superior wear resistance. Burs, oil field applications, nozzles, seats, discs, etc.
8924 K20 89.0% 11.0% Medium 88.0 2413 14.30
Exceptional toughness and fracture resistance. Blade inserts, flattening rolls.

Grain Chart
Avg Size Classification
< 0.2 Nano
0.2 ≤ 0.5 Ultra-Fine
0.5 ≤ 0.8 Sub-Micron
0.8 ≤ 1.3 Fine
1.3 ≤ 2.5 Medium
2.5 ≤ 6.0 Coarse
> 6.0 Extra-Coarse