DIN / EN · Europe · 1 designation

26MnCr6-3

26MnCr6-3 is a material in the category High-strength steels, held under material number 1.8721. Its recorded composition includes C ≤ 0.3%, Si ≤ 0.5%, Cr ≤ 1%, Mn ≤ 1.8% and Ni 0.8%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³.

Material no. 1.8721
Category High-strength steels · 128 grades
Designations 1

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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

11 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 94.9 %Mn — 1.8 %Cr — 1 %Ni — 0.8 %Traces & impurities · 1.5 %

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

Element	% by weight
	≤ 0.3
	≤ 0.5
	≤ 1.8
	0.025
	0.025
	≤ 1
	≤ 0.5
	0.8
	≤ 0.08
	≤ 0.05
	≤ 0.005

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
B	≤0,005	—	0.005	Max
C	≤0,30	—	0.300	Max
Si	≤0,50	—	0.500	Max
P	0,025	0.025	0.025	Exact
S	0,025	0.025	0.025	Exact
V	≤0,08	—	0.080	Max
Cr	≤1,00	—	1.000	Max
Mn	≤1,80	—	1.800	Max
Ni	0,8	0.800	0.800	Exact
Nb	≤0,05	—	0.050	Max
Mo	≤0,50	—	0.500	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 · °C

Predicted Ae3782°C

Predicted Ae1721°C

Predicted Acm544°C

Predicted Bs490°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 / Ni 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.

17MnCr5-31.8715

Mn ≤1,80 · Ni 0,8