21CrMoV5-11
21CrMoV5-11 is a material in the category Heat-resistant structural steels, held under material number 1.8070. Its recorded composition includes C 0.17–0.25%, Si 0.3–0.6%, Cr 1.2–1.5%, Mn 0.3–0.6% and Mo 1–1.2%. We list 6 designations recorded for this grade, in the standards AFNOR, GOST, PN and MSZ. Its recorded density is 7.85 g/cm³.
About Heat-resistant structural steels
Heat-resistant structural steels are structural steels designed to retain useful strength and dimensional stability at elevated temperatures. They are used for load-bearing components in hot-service equipment where mechanical performance must be maintained during heating.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
7 designations · 5 standards · nothing hidden- 21CrMoV5-11This grade’s own name
Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
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 |
|---|---|
0.17–0.25 | |
0.3–0.6 | |
0.3–0.6 | |
0.035 | |
0.035 | |
1.2–1.5 | |
1–1.2 — | |
0.6 | |
0.25–0.35 |
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 | 0,17-0,25 | 0.170 | 0.250 | Range |
| Si | 0,30-0,60 | 0.300 | 0.600 | Range |
| P | 0,035 | 0.035 | 0.035 | Exact |
| S | 0,035 | 0.035 | 0.035 | Exact |
| V | 0,25-0,35 | 0.250 | 0.350 | Range |
| Cr | 1,20-1,50 | 1.200 | 1.500 | Range |
| Mn | 0,30-0,60 | 0.300 | 0.600 | Range |
| Ni | 0,6 | 0.600 | 0.600 | Exact |
| Mo | 1,00-1,20 | 1.000 | 1.200 | 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
computed from composition · °CThese four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either.
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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