AFNOR · France · 6 designations

E24W4

E24W4 is a designation in AFNOR for the material held under material number 1.8961, also listed as WTSt 37-3. It is a material in the category Weathering steels. We list 6 designations recorded for this grade, in the standards DIN / EN, AFNOR, JIS and UNI.

Material no. 1.8961
Category Weathering steels · 27 grades
Designations 6

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If you came for one of these

The most-used names for this grade.

DIN / ENS235J2WThis grade’s own name

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

6 designations · 4 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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 · 3

AFNORFrance · 1

E24W4Indicative

JISJapan · 1

SMA490CWIndicative

UNIItaly · 1

Fe360DK1Indicative

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 — 97.4 %Ni — 0.7 %Cr — 0.6 %Si — 0.4 %Traces & impurities · 1 %

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

Element	% by weight
	≤ 0.13
	≤ 0.4
	0.2–0.6
	0.035
	0.03
	0.4–0.8
	0.65
	0.25–0.55

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	—	0.130	Max
Si	≤0,40	—	0.400	Max
P	0,035	0.035	0.035	Exact
S	0,03	0.030	0.030	Exact
Cr	0,40-0,80	0.400	0.800	Range
Mn	0,20-0,60	0.200	0.600	Range
Ni	(0,65)	0.650	0.650	Exact
Cu	0,25-0,55	0.250	0.550	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: Mo.

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	—	—	19	—
2 – 2.5	—	—	20	—
2.5 – 3	—	—	21	—
≤ 3	—	360 – 510	—	—
3 – 100	—	360 – 510	—	—
3 – 40	—	—	—	26
≤ 16	235	—	—	—
16 – 40	225	—	—	—
40 – 63	215	—	—	25
63 – 80	215	—	—	—
63 – 100	—	—	—	24
80 – 100	215	—	—	—
100 – 150	195	350 – 500	—	22

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 Ni / Cr 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.

Fe360CKI1.8958

Ni (0,65) · Cr 0,40-0,80