Material number · Europe · 1 designation

1.5408

1.5408 is the material number of the grade also listed as 30MoB1. It is a material in the category Heat-resistant structural steels. We list 1 designations recorded for this grade, in the standards DIN / EN.

Material no. 1.5408
Category Heat-resistant structural steels · 62 grades
Designations 1

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If you came for one of these

The most-used names for this grade.

DIN / EN30MoB1This grade’s own name

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.

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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

30MoB1This 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

9 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.8 %Mn — 0.9 %C — 0.3 %Si — 0.3 %Traces & impurities · 0.7 %

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

Element	% by weight
	0.28–0.32
	≤ 0.3
	0.8–1
	0.025
	0.025
	≤ 0.3
	0.08–0.12
	≤ 0.25
	0.0008–0.005

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	0,0008-0,0050	0.001	0.005	Range
C	0,28-0,32	0.280	0.320	Range
Si	≤0,30	—	0.300	Max
P	0,025	0.025	0.025	Exact
S	0,025	0.025	0.025	Exact
Cr	≤0,30	—	0.300	Max
Mn	0,80-1,00	0.800	1.000	Range
Cu	≤0,25	—	0.250	Max
Mo	0,08-0,12	0.080	0.120	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

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 1.5, a shared category, and a published range for Mn / Si 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.

11MnMo4-51.5425

Mn 0,85-1,15 · Si 0,08-0,22