10MnMo4-5
10MnMo4-5 is a material in the category Heat-resistant structural steels, held under material number 1.5424. Its recorded composition includes C 0.08–0.12%, Si 0.55–0.75%, Mn 0.95–1.25%, Cu ≤ 0.17% and Mo 0.48–0.62%. No cross-standard equivalents are recorded for this grade yet. 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.
Chemical composition
10 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 |
|---|---|
0.08–0.12 | |
0.55–0.75 — | |
0.95–1.25 | |
0.02 | |
0.02 | |
≤ 0.12 | |
0.48–0.62 | |
0.12 | |
≤ 0.17 | |
≤ 0.03 |
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 | 0,08-0,12 | 0.080 | 0.120 | Range |
| Al | ≤0,030 | — | 0.030 | Max |
| Si | 0,55-0,75 | 0.550 | 0.750 | Range |
| P | 0,02 | 0.020 | 0.020 | Exact |
| S | 0,02 | 0.020 | 0.020 | Exact |
| Cr | ≤0,12 | — | 0.120 | Max |
| Mn | 0,95-1,25 | 0.950 | 1.250 | Range |
| Ni | 0,12 | 0.120 | 0.120 | Exact |
| Cu | ≤0,17 | — | 0.170 | Max |
| Mo | 0,48-0,62 | 0.480 | 0.620 | 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.
Similar grades — and why
Selection rule, stated so you can disagree with it: same number class 1.5, a shared category, and a published range for Mn / Si 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.
Mn 0,70-1,10 · Si 0,40-0,70
- ΔMn 0.20
- ΔSi 0.10
- 1 designations
Mn 0,80-1,20 · Si ≤0,60
- ΔMn 0.10
- ΔSi 0.35
- 1 designations
Mn 1,25-1,50 · Si 0,30-0,60
- ΔMn 0.27
- ΔSi 0.20
- 1 designations
Mn 0,50-1,00 · Si ≤0,60
- ΔMn 0.35
- ΔSi 0.35
- 6 designations
Mn 1,20-1,80 · Si ≤0,60
- ΔMn 0.40
- ΔSi 0.35
- 1 designations
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