STD8
STD8 is a grade designated under KS. Its recorded composition includes C 0.35–0.45%, V 1.7–2.1%, Cr 4–4.7%, Co 4–4.5% and W 3.8–4.5%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB 262.
- Designations 1
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 |
|---|---|
0.35–0.45 | |
0.15–0.5 | |
0.2–0.5 | |
≤ 0.03 | |
≤ 0.02 | |
4–4.7 | |
0.3–0.5 | |
1.7–2.1 | |
3.8–4.5 | |
4–4.5 |
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 | 0.35 - 0.45 | 0.350 | 0.450 | Range |
| Si | 0.15 - 0.5 | 0.150 | 0.500 | Range |
| P | max 0.03 | — | 0.030 | Max |
| S | max 0.02 | — | 0.020 | Max |
| V | 1.7 - 2.1 | 1.700 | 2.100 | Range |
| Cr | 4 - 4.7 | 4.000 | 4.700 | Range |
| Mn | 0.2 - 0.5 | 0.200 | 0.500 | Range |
| Co | 4 - 4.5 | 4.000 | 4.500 | Range |
| Mo | 0.3 - 0.5 | 0.300 | 0.500 | Range |
| W | 3.8 - 4.5 | 3.800 | 4.500 | 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.
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.