Q550NH
Q550NH is a grade designated under GB. Its recorded composition includes C ≤ 0.16%, Si ≤ 0.65%, Cr 0.3–1.25%, Mn ≤ 2% and Ni 0.12–0.65%. No cross-standard equivalents are recorded for this grade yet.
- Designations 1
Chemical composition
8 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 |
|---|---|
≤ 0.16 | |
≤ 0.65 | |
≤ 2 | |
≤ 0.025 | |
≤ 0.03 | |
0.3–1.25 | |
0.12–0.65 | |
0.2–0.55 |
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 | ≤0.16 | — | 0.160 | Max |
| Si | ≤0.65 | — | 0.650 | Max |
| P | ≤0.025 | — | 0.025 | Max |
| S | ≤0.03 | — | 0.030 | Max |
| Cr | 0.3-1.25 | 0.300 | 1.250 | Range |
| Mn | ≤2 | — | 2.000 | Max |
| Ni | 0.12-0.65 | 0.120 | 0.650 | Range |
| Cu | 0.2-0.55 | 0.200 | 0.550 | 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.
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