DIN / EN · Europe · 3 designations

P285NH

P285NH is a material in the category Heat-resistant structural steels, held under material number 1.0477. Its recorded composition includes C ≤ 0.18%, Si ≤ 0.4%, Cr ≤ 0.3%, Mn 0.6–1.4% and Ni ≤ 0.3%. We list 2 designations recorded for this grade, in the standards UNS. Its recorded density is 7.85 g/cm³.

Material no. 1.0477
Category Heat-resistant structural steels · 62 grades
Designations 3

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If you came for one of these

The most-used names for this grade.

UNSK02704This grade’s own name · 3 grades on that route

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

3 designations · 2 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

P285NHThis grade’s own name

UNSUnited States · 2

Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.

Chemical composition

13 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.4 %Mn — 1 %Si — 0.4 %Cr — 0.3 %Traces & impurities · 0.9 %

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

Element	% by weight
	≤ 0.18
	≤ 0.4
	0.6–1.4
	0.025
	0.015
	≤ 0.3
	≤ 0.08
	≤ 0.3
	≤ 0.05
	≤ 0.2
	0.02–0.06
	≤ 0.03
	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	≤0,18	—	0.180	Max
N	0,02	0.020	0.020	Exact
Al	0,020-0,060	0.020	0.060	Range
Si	≤0,40	—	0.400	Max
P	0,025	0.025	0.025	Exact
S	0,015	0.015	0.015	Exact
V	≤0,05	—	0.050	Max
Cr	≤0,30	—	0.300	Max
Mn	0,60-1,40	0.600	1.400	Range
Ni	≤0,30	—	0.300	Max
Cu	≤0,20	—	0.200	Max
Nb	≤0,03	—	0.030	Max
Mo	≤0,08	—	0.080	Max

(Nb+V) ≤0,05
(Nb+V) ≤0,05
(Nb+V) ≤0,05

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 Ae3815°C

Predicted Ae1715°C

Predicted Acm418°C

Predicted Bs560°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 1.0, 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.

1.04251.0425

Mn 0,80-1,40 · Si ≤0,40