DIN / EN · Europe · 1 designation

20MnCrNiMo6-3

20MnCrNiMo6-3 is a material in the category High-strength steels, held under material number 1.8708. Its recorded composition includes C 0.16–0.22%, Si 0.15–0.35%, Cr 0.6–0.75%, Mn 1.3–1.55% and Ni 0.3–0.4%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³.

Material no. 1.8708
Category High-strength steels · 128 grades
Designations 1

Search Inquiry Datasheet as PDFPrint-ready A4 documentGenerating …Download startedTry again

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

9 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 96.8 %Mn — 1.4 %Cr — 0.7 %Ni — 0.4 %Traces & impurities · 0.8 %

Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.

Element	% by weight
	0.16–0.22
	0.15–0.35
	1.3–1.55
	0.035
	0.035
	0.6–0.75
	0.22–0.3
	0.3–0.4
	≥ 0.02

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	0,16-0,22	0.160	0.220	Range
Al	≥0,020	0.020	—	Min
Si	0,15-0,35	0.150	0.350	Range
P	0,035	0.035	0.035	Exact
S	0,035	0.035	0.035	Exact
Cr	0,60-0,75	0.600	0.750	Range
Mn	1,30-1,55	1.300	1.550	Range
Ni	0,30-0,40	0.300	0.400	Range
Mo	0,22-0,30	0.220	0.300	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 · °C

Predicted Ae3801°C

Predicted Ae1721°C

Predicted Acm471°C

Predicted Bs526°C

These 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

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.

S890G1QL1.8796

Mn 1,20-1,50 · Cr 0,50-0,90