HDT780C
HDT780C is a material in the category High-strength multi-phase steels, held under material number 1.0957. Its recorded composition includes C ≤ 0.18%, Al ≤ 2%, Si ≤ 0.8%, V ≤ 0.2% and Mn ≤ 2.2%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³.
About High-strength multi-phase steels
High-strength multi-phase steels are iron-based materials with multiple microstructural constituents designed to provide high strength with useful ductility. They are used for load-bearing and crash-relevant components where weight reduction, structural performance and energy absorption are important.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Chemical composition
8 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 |
|---|---|
≤ 0.18 | |
≤ 0.8 | |
≤ 2.2 | |
0.08 — | |
0.015 | |
≤ 0.2 | |
≤ 2 | |
≤ 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 | ≤0,005 | — | 0.005 | Max |
| C | ≤0,18 | — | 0.180 | Max |
| Al | ≤2,00 | — | 2.000 | Max |
| Si | ≤0,80 | — | 0.800 | Max |
| P | 0,08 | 0.080 | 0.080 | Exact |
| S | 0,015 | 0.015 | 0.015 | Exact |
| V | ≤0,20 | — | 0.200 | Max |
| Mn | ≤2,20 | — | 2.200 | Max |
- (Cr+Mo)≤1,00; (Nb+Ti)≤0,15
- (Cr+Mo)≤1,00; (Nb+Ti)≤0,15
- (Cr+Mo)≤1,00; (Nb+Ti)≤0,15
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, Cr, Mo.
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 1.0, a shared category, and a published range for Mn / Al 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.