DIN / EN · Europe · 14 designations

S355J0C

S355J0C is a designation in DIN / EN for the material held under material number 1.0554, also listed as St 52-3 U. It is a material in the category Unalloyed structural steels. We list 14 designations recorded for this grade, in the standards DIN / EN, AISI / SAE, BS, AFNOR, JIS, GOST, ČSN, STN and NBN.

Material no. 1.0554
Category Unalloyed structural steels · 452 grades
Designations 14

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If you came for one of these

The most-used names for this grade.

DIN / ENSt 52-3 UThis grade’s own name · 3 grades on that route

About Unalloyed structural steels

Unalloyed structural steels include all low-carbon steels in which the iron companions do not exceed specified minimum values. The yield strength, formability and weldability are the decisive factors for their use. They are soft, pliable, tough and stretchy, but cannot be hardened by heat treatment.

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

Also known as

14 designations · 9 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

Superseded bythe current name this withdrawn designation was replaced by — the same grade under its present designation, the one to order by today.

DIN / ENEurope · 2

S355J0CIndicative
FormerlySt 52-3 U
St 52-3 UThis grade’s own name

AISI / SAEUnited States · 1

Gr.105-85Indicative

BSUnited Kingdom · 2

AFNORFrance · 2

JISJapan · 1

SCC5Indicative

GOSTRussia / CIS · 2

ČSNCzechia · 2

STNSlovakia · 1

11 523Indicative

NBNBelgium · 1

AE355-CIndicative

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

Chemical composition

6 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.6 %Mn — 1.6 %Si — 0.6 %C — 0.2 %Traces & impurities · 0.1 %

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

Element	% by weight
	≤ 0.2
	≤ 0.55
	≤ 1.6
	0.04
	0.04
	0.009

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	—	0.200	Max
N	0,009	0.009	0.009	Exact
Si	≤0,55	—	0.550	Max
P	0,04	0.040	0.040	Exact
S	0,04	0.040	0.040	Exact
Mn	≤1,60	—	1.600	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

Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni, Cr, Mo.

Physical & mechanical properties

Density7,85g/cm³Exact

Transformation point Ac1725°CExact

Transformation point Ac3770°CExact · Ac3(Acm)

Transformation point Ar3755°CExact · Ar3(Arcm)

Transformation point Ar1690°CExact

Weldabilitydifficult to weldAs published: hard weldability.

Flake sensitivitynot susceptibleAs published: not predisposed

Temper brittlenessnot susceptibleAs published: not predisposed

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

2 conditions · 18 values

By dimensionNormalizing 840 - 860°C,Drawing 600 - 630°Csource splav

Dimensionmm	RmN/mm²	ReN/mm²	A5%	Z%	KCUkJ/m²
to 100	600	350	10	18	240

At temperatureno delivery state statedsource splav

Temperature°C	Densityg/cm³	Thermal expansion coefficient10^-6/K	Thermal conductivityW/(m·K)	Specific heat capacityJ/(kg·K)
20	7.82	—	—	—
100	—	11	68	479
200	—	11.8	55	487
400	—	13.4	36	525
500	—	—	32	—
600	—	14.5	—	571

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 1.0, 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.

S355JR1.0045

Mn ≤1,60 · Si ≤0,55