S 6-5-2-8
S 6-5-2-8 is a material in the category High-speed steels, held under material number 1.3222. Its recorded composition includes C 1.4–1.5%, Cr 4–4.5%, Co 7.5–8.5%, Mo 4.7–5.2% and W 6–6.7%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³.
About High-speed steels
High-speed steels are alloyed tool steels designed to retain hardness and cutting ability when tools heat up during high-speed machining. Their hot hardness and wear resistance make them suitable for cutting tools such as drills, milling cutters, taps and broaches.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Chemical composition
10 elements on file · weight %What this alloy is
Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.
| Element | % by weight |
|---|---|
1.4–1.5 | |
0.2–0.4 | |
0.2–0.4 | |
0.03 | |
0.03 | |
4–4.5 | |
4.7–5.2 | |
2.2–2.6 | |
6–6.7 | |
7.5–8.5 |
The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other.
| Element | As publishedsource text, verbatim | Min% by weight | Max% by weight | Bound |
|---|---|---|---|---|
| C | 1,40-1,50 | 1.400 | 1.500 | Range |
| Si | 0,20-0,40 | 0.200 | 0.400 | Range |
| P | 0,03 | 0.030 | 0.030 | Exact |
| S | 0,03 | 0.030 | 0.030 | Exact |
| V | 2,20-2,60 | 2.200 | 2.600 | Range |
| Cr | 4,00-4,50 | 4.000 | 4.500 | Range |
| Mn | 0,20-0,40 | 0.200 | 0.400 | Range |
| Co | 7,50-8,50 | 7.500 | 8.500 | Range |
| Mo | 4,70-5,20 | 4.700 | 5.200 | Range |
| W | 6,00-6,70 | 6.000 | 6.700 | Range |
The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred.
Predicted transformation temperatures
Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni.
Physical & mechanical properties
An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material.
Similar grades — and why
Selection rule, stated so you can disagree with it: same number class 1.3, a shared category, and a published range for Co / W that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade.
Looking for this grade under another name?
Search the catalogue by designation, material number or composition — every name on this page is itself a way in.