Material number · Europe · 1 designation

1.7273

1.7273 is the material number of the grade also listed as 24CrMo10. It is a material in the category Hydrogen resistant steels. We list 1 designations recorded for this grade, in the standards DIN / EN.

Material no. 1.7273
Category Hydrogen resistant steels · 8 grades
Designations 1

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If you came for one of these

The most-used names for this grade.

DIN / EN24CrMo10This grade’s own name

About Hydrogen resistant steels

Hydrogen resistant steels are steels designed to withstand hydrogen-related damage, including hydrogen embrittlement and hydrogen attack. They are used for pressure vessels, piping and process equipment exposed to hydrogen-containing environments, where resistance to hydrogen ingress and loss of toughness is 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

24CrMo10This 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

8 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 95.3 %Cr — 2.5 %Ni — 0.8 %Mn — 0.7 %Traces & impurities · 0.8 %

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

Element	% by weight
	0.2–0.28
	0.15–0.35
	0.5–0.8
	0.035
	0.035
	2.3–2.6
	0.2–0.3
	0.8

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	0,20-0,28	0.200	0.280	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	2,30-2,60	2.300	2.600	Range
Mn	0,50-0,80	0.500	0.800	Range
Ni	0,8	0.800	0.800	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 Ae3790°C

Predicted Ae1769°C

Predicted Acm560°C

Predicted Bs480°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.

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