B 473
B 473 is a designation in ASTM for the material held under material number 2.4660, also listed as NiCr20CuMo. It is a material in the category Nickel and cobalt alloys. We list 15 designations recorded for this grade, in the standards DIN / EN, UNS, ASTM, ISO and GB.
If you came for one of these
The most-used names for this grade.About Nickel and cobalt alloys
Nickel and cobalt alloys are metallic materials whose properties are developed through nickel-, cobalt-, or combined alloying systems. They are characterised by strong resistance to corrosion, oxidation, wear, and loss of strength at elevated temperatures, making them suitable for turbine components, chemical-processing equipment, and other demanding high-temperature applications.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
15 designations · 5 standards · nothing hiddenEvery designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
11 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 |
|---|---|
≤ 0.07 | |
≤ 1 | |
≤ 2 | |
0.025 | |
0.015 | |
19–21 | |
2–3 | |
32–38 | |
≤ 1.5 | |
3–4 | |
Balance |
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 | ≤0,07 | — | 0.070 | Max |
| Si | ≤1,00 | — | 1.000 | Max |
| P | 0,025 | 0.025 | 0.025 | Exact |
| S | 0,015 | 0.015 | 0.015 | Exact |
| Cr | 19,0-21,0 | 19.000 | 21.000 | Range |
| Mn | ≤2,00 | — | 2.000 | Max |
| Fe | Rest/Bal. | 29.390 | 43.960 | Balance |
| Co | ≤1,50 | — | 1.500 | Max |
| Ni | 32,0-38,0 | 32.000 | 38.000 | Range |
| Cu | 3,00-4,00 | 3.000 | 4.000 | Range |
| Mo | 2,00-3,00 | 2.000 | 3.000 | Range |
- ≥8xC ≤1,00
- ≥8xC ≤1,00
- ≥8xC ≤1,00
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
This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here.
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 2.4, a shared category, and a published range for Fe / Ni 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.