8MoB5-4
8MoB5-4 is a material in the category Heat-resistant structural steels, held under material number 1.5450. Its recorded composition includes C 0.06–0.1%, Si 0.1–0.35%, Mn 0.6–0.8%, Cu ≤ 0.3% and Mo 0.4–0.5%. 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
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 |
|---|---|
0.06–0.1 | |
0.1–0.35 | |
0.6–0.8 | |
0.025 | |
0.02 | |
≤ 0.2 | |
0.4–0.5 | |
≤ 0.3 | |
≤ 0.06 | |
≤ 0.06 | |
0.002–0.006 |
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 |
|---|---|---|---|---|
| B | 0,002-0,006 | 0.002 | 0.006 | Range |
| C | 0,06-0,10 | 0.060 | 0.100 | Range |
| Al | ≤0,060 | — | 0.060 | Max |
| Si | 0,10-0,35 | 0.100 | 0.350 | Range |
| P | 0,025 | 0.025 | 0.025 | Exact |
| S | 0,02 | 0.020 | 0.020 | Exact |
| Ti | ≤0,060 | — | 0.060 | Max |
| Cr | ≤0,20 | — | 0.200 | Max |
| Mn | 0,60-0,80 | 0.600 | 0.800 | Range |
| Cu | ≤0,30 | — | 0.300 | Max |
| Mo | 0,40-0,50 | 0.400 | 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.
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 / Mo 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 0,50-0,80 · Mo 0,45-0,55
- ΔMn 0.05
- ΔMo 0.05
- 1 designations
Mn 0,60-0,80 · Mo 0,50-0,60
- ΔMn 0.00
- ΔMo 0.10
- 1 designations
Mn 0,50-1,00 · Mo 0,40-0,60
- ΔMn 0.05
- ΔMo 0.05
- 6 designations
Mn 0,50-0,80 · Mo 0,45-0,65
- ΔMn 0.05
- ΔMo 0.10
- 20 designations
Mn 0,70-1,00 · Mo 0,40-0,60
- ΔMn 0.15
- ΔMo 0.05
- 3 designations
Mn 0,40-0,70 · Mo 0,30-0,40
- ΔMn 0.15
- ΔMo 0.10
- 1 designations
Looking for this grade under another name?
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