Č.6881
Č.6881 is a designation in SRPS for the material held under material number 1.3302, also listed as HS12-1-4. It is a material in the category High-speed steels. We list 4 designations recorded for this grade, in the standards DIN / EN, ČSN and SRPS.
If you came for one of these
The most-used names for this grade.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.
Also known as
4 designations · 3 standards · nothing hidden- Č.6881Indicative
Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
9 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 |
|---|---|
1.2–1.35 | |
≤ 0.45 | |
≤ 0.4 | |
0.03 | |
0.03 | |
3.8–4.5 | |
0.7–1 | |
3.5–4 | |
11.5–12.5 |
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 | 1,20-1,35 | 1.200 | 1.350 | Range |
| Si | ≤0,45 | — | 0.450 | Max |
| P | 0,03 | 0.030 | 0.030 | Exact |
| S | 0,03 | 0.030 | 0.030 | Exact |
| V | 3,50-4,00 | 3.500 | 4.000 | Range |
| Cr | 3,80-4,50 | 3.800 | 4.500 | Range |
| Mn | ≤0,40 | — | 0.400 | Max |
| Mo | 0,70-1,00 | 0.700 | 1.000 | Range |
| W | 11,5-12,5 | 11.500 | 12.500 | 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 W / Cr 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.