18Nb
18Nb is a grade designated under GB. Its recorded composition includes C 0.14–0.22%, Si 0.17–0.37%, Cr ≤ 0.3%, Mn 0.4–0.8% and Ni ≤ 0.3%. No cross-standard equivalents are recorded for this grade yet.
- Designations 1
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 |
|---|---|
0.14–0.22 | |
0.17–0.37 | |
0.4–0.8 | |
≤ 0.045 | |
≤ 0.045 | |
≤ 0.3 | |
≤ 0.3 | |
≤ 0.3 | |
0.02–0.05 |
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 | 0.14-0.22 | 0.140 | 0.220 | Range |
| Si | 0.17-0.37 | 0.170 | 0.370 | Range |
| P | ≤0.045 | — | 0.045 | Max |
| S | ≤0.045 | — | 0.045 | Max |
| Cr | ≤0.3 | — | 0.300 | Max |
| Mn | 0.4-0.8 | 0.400 | 0.800 | Range |
| Ni | ≤0.3 | — | 0.300 | Max |
| Cu | ≤0.3 | — | 0.300 | Max |
| Nb | 0.02-0.05 | 0.020 | 0.050 | 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: Mo.
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.