DIN / EN · Europe · 29 designations

S355J2W(+N)

S355J2W(+N) is a designation in DIN / EN for the material held under material number 1.8963, also listed as WTSt 52-3. It is a material in the category Weathering steels. We list 29 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, JIS, UNI, ČSN, STN and CSA.

Material no. 1.8963
Category Weathering steels · 27 grades
Designations 29

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If you came for one of these

The most-used names for this grade.

UNSK11430This grade’s own name · 4 grades on that route

About Weathering steels

Weathering steels are structural steels designed to develop a protective patina when exposed to the atmosphere. This characteristic helps limit further corrosion and makes them suitable for bridges, building facades, rail vehicles and other outdoor structures where reduced coating maintenance is desirable.

This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.

Also known as

29 designations · 10 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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 · 7

UNSUnited States · 11

AISI / SAEUnited States · 4

BSUnited Kingdom · 1

WR50CIndicative

AFNORFrance · 1

E36WB4Indicative

JISJapan · 1

SMA570WIndicative

UNIItaly · 1

Fe510D2K1Indicative

ČSNCzechia · 1

15127Indicative

STNSlovakia · 1

15 127Indicative

CSACanada · 1

400AATIndicative

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

Chemical composition

14 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 96 %Mn — 1 %Ni — 0.7 %Cr — 0.6 %Traces & impurities · 1.8 %

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

Element	% by weight
	≤ 0.16
	≤ 0.5
	0.5–1.5
	0.035
	0.035
	0.4–0.8
	≤ 0.3
	0.65
	0.02–0.12
	0.25–0.55
	≥ 0.02
	0.02–0.1
	0.015–0.06
	0.15

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	≤0,16	—	0.160	Max
Al	≥0,020	0.020	—	Min
Si	≤0,50	—	0.500	Max
P	0,035	0.035	0.035	Exact
S	0,035	0.035	0.035	Exact
Ti	0,02-0,10	0.020	0.100	Range
V	0,02-0,12	0.020	0.120	Range
Cr	0,40-0,80	0.400	0.800	Range
Mn	0,50-1,50	0.500	1.500	Range
Ni	0,65	0.650	0.650	Exact
Cu	0,25-0,55	0.250	0.550	Range
Zr	0,15	0.150	0.150	Exact
Nb	0,015-0,060	0.015	0.060	Range
Mo	≤0,30	—	0.300	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 Ae3814°C

Predicted Ae1722°C

Predicted Acm423°C

Predicted Bs526°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.

Properties by condition

1 conditions · 16 values

By thicknessno delivery state statedsource steelnumber

Thicknessmm	ReHN/mm²	RmN/mm²	A80%	A%
1.5 – 2	—	—	16	—
2 – 2.5	—	—	17	—
2.5 – 3	—	—	18	—
≤ 3	—	510 – 680	—	—
3 – 100	—	470 – 630	—	—
3 – 40	—	—	—	22
≤ 16	355	—	—	—
16 – 40	345	—	—	—
40 – 63	335	—	—	21
63 – 80	325	—	—	—
63 – 100	—	—	—	20
80 – 100	315	—	—	—
100 – 150	295	450 – 600	—	18

Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ.

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.

A709-50W1.8959

Mn 0,50-1,50 · Ni (0,65)