Material number · Europe · 1 designation

1.8780

1.8780 is the material number of the grade also listed as S800QL1. It is a material in the category High-strength steels. We list 1 designations recorded for this grade, in the standards DIN / EN.

Material no. 1.8780
Category High-strength steels · 128 grades
Designations 1

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If you came for one of these

The most-used names for this grade.

DIN / ENS800QL1This grade’s own name

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.

Also known as

1 designations · 1 standards · nothing hidden

This grade’s own namerecorded in our sources as this grade’s own designation under that standard.

Indicativetaken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.

Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

DIN / ENEurope · 1

S800QL1This 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

7 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 95.3 %Mn — 1.6 %Cr — 1.5 %Si — 0.8 %Traces & impurities · 0.8 %

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

0.01 %0.1 %1 %10 %100 %

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	≤0,20	—	0.200	Max
Si	≤,80	—	0.800	Max
P	0,02	0.020	0.020	Exact
S	0,01	0.010	0.010	Exact
Cr	≤1,50	—	1.500	Max
Mn	≤1,60	—	1.600	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

Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni.

Physical & mechanical properties

Density7,85g/cm³Exact

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 Mn / Cr 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.

S800QL1.8770

Mn ≤1,60 · Cr ≤1,50