S800QL
S800QL is a material in the category High-strength steels, held under material number 1.8770. Its recorded composition includes C ≤ 0.2%, Si ≤ 0.8%, Cr ≤ 1.5%, Mn ≤ 1.6% and Ni 2%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³.
About High-strength steels
High-strength steels are steels designed to carry high loads while resisting deformation. They are used for load-bearing structures, vehicles and machinery where strength, durability and reduced material weight are important.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Chemical composition
12 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 |
|---|---|
≤ 0.2 | |
≤ 0.8 | |
≤ 1.6 | |
0.02 | |
0.01 | |
≤ 1.5 | |
≤ 0.6 | |
2 | |
≤ 0.12 | |
≤ 0.05 | |
≤ 0.06 | |
≤ 0.005 |
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 | ≤0,0050 | — | 0.005 | Max |
| C | ≤0,20 | — | 0.200 | Max |
| Si | ≤0,80 | — | 0.800 | Max |
| P | 0,02 | 0.020 | 0.020 | Exact |
| S | 0,01 | 0.010 | 0.010 | Exact |
| Ti | ≤0,05 | — | 0.050 | Max |
| V | ≤0,12 | — | 0.120 | Max |
| Cr | ≤1,50 | — | 1.500 | Max |
| Mn | ≤1,60 | — | 1.600 | Max |
| Ni | 2 | 2.000 | 2.000 | Exact |
| Nb | ≤0,06 | — | 0.060 | Max |
| Mo | ≤0,60 | — | 0.600 | Max |
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 1.8, a shared category, and a published range for Ni / Mn 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.
Ni 2 · Mn ≤1,70
- ΔNi 0.00
- ΔMn 0.05
- 2 designations
Ni 2 · Mn ≤1,70
- ΔNi 0.00
- ΔMn 0.05
- 17 designations
Ni 2 · Mn ≤1,70
- ΔNi 0.00
- ΔMn 0.05
- 5 designations
Ni 2 · Mn ≤1,70
- ΔNi 0.00
- ΔMn 0.05
- 4 designations
Ni 2 · Mn ≤1,70
- ΔNi 0.00
- ΔMn 0.05
- 2 designations
Ni 2 · Mn ≤1,70
- ΔNi 0.00
- ΔMn 0.05
- 2 designations
Looking for this grade under another name?
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