DIN / EN · Europe · 1 designation

16CrMo4

16CrMo4 is a material in the category Heat-resistant structural steels, held under material number 1.7242. Its recorded composition includes C 0.13–0.2%, Si 0.15–0.35%, Cr 0.9–1.2%, Mn 0.5–0.8% and Ni 0.4%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³.

Material no. 1.7242
Category Heat-resistant structural steels · 62 grades
Designations 1

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About Heat-resistant structural steels

Heat-resistant structural steels are structural steels designed to retain useful strength and dimensional stability at elevated temperatures. They are used for load-bearing components in hot-service equipment where mechanical performance must be maintained during heating.

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

Iron — the balance, never listed by a standard — 97.2 %Cr — 1.1 %Mn — 0.7 %Ni — 0.4 %Traces & impurities · 0.7 %

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

Element	% by weight
	0.13–0.2
	0.15–0.35
	0.5–0.8
	0.035
	0.035
	0.9–1.2
	0.2–0.3
	0.4

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	0,13-0,20	0.130	0.200	Range
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	0,90-1,20	0.900	1.200	Range
Mn	0,50-0,80	0.500	0.800	Range
Ni	0,4	0.400	0.400	Exact
Mo	0,20-0,30	0.200	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 Ae3814°C

Predicted Ae1742°C

Predicted Acm465°C

Predicted Bs538°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 1.7, a shared category, and a published range for Cr / 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.

24CrMo51.7258

Cr 0,90-1,20 · Mn 0,50-0,80