Q390GNH
Q390GNH is a grade designated under GB. Its recorded composition includes C ≤ 0.12%, Si 0.15–0.65%, P 0.07–0.12%, Mn ≤ 1.4% and Cu 0.25–0.5%. No cross-standard equivalents are recorded for this grade yet.
- Designations 1
Chemical composition
7 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 |
|---|---|
≤ 0.12 | |
0.15–0.65 | |
≤ 1.4 | |
0.07–0.12 — | |
≤ 0.035 | |
0.25–0.5 | |
≤ 0.1 |
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 | ≤0.12 | — | 0.120 | Max |
| Si | 0.15-0.65 | 0.150 | 0.650 | Range |
| P | 0.07-0.12 | 0.070 | 0.120 | Range |
| S | ≤0.035 | — | 0.035 | Max |
| Ti | ≤0.1 | — | 0.100 | Max |
| Mn | ≤1.4 | — | 1.400 | Max |
| Cu | 0.25-0.5 | 0.250 | 0.500 | 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, Cr, 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.
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