DIN / EN · Europe · 11 designations

St 37.0

St 37.0 is a designation in DIN / EN for the material held under material number 1.0254, also listed as P235TR1. It is a material in the category Unalloyed structural steels. We list 11 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, JIS, GB and ČSN.

Material no. 1.0254
Category Unalloyed structural steels · 452 grades
Designations 11

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If you came for one of these

The most-used names for this grade.

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

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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

Superseded bythe current name this withdrawn designation was replaced by — the same grade under its present designation, the one to order by today.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 · 4

1.0254Indicative
P235TR1This grade’s own name
S235Indicative
St 37.0This grade’s own nameWithdrawn
Superseded byP235T1

UNSUnited States · 2

AISI / SAEUnited States · 1

1020Indicative

ASTMUnited States · 1

A 53 Grade AIndicative

JISJapan · 1

S20CIndicative

GBChina · 1

20Indicative

ČSNCzechia · 1

11353Indicative

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

Chemical composition

12 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.2 %Mn — 1.2 %Si — 0.4 %Cr — 0.3 %Traces & impurities · 1 %

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

Element	% by weight
	≤ 0.16
	≤ 0.35
	≤ 1.2
	0.025
	0.02
	≤ 0.3
	≤ 0.08
	≤ 0.3
	≤ 0.02
	≤ 0.3
	≤ 0.04
	≤ 0.01

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
Si	≤0,35	—	0.350	Max
P	0,025	0.025	0.025	Exact
S	0,02	0.020	0.020	Exact
Ti	≤0,04	—	0.040	Max
V	≤0,02	—	0.020	Max
Cr	≤0,30	—	0.300	Max
Mn	≤1,20	—	1.200	Max
Ni	≤0,30	—	0.300	Max
Cu	≤0,30	—	0.300	Max
Nb	≤0,010	—	0.010	Max
Mo	≤0,08	—	0.080	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 Ae3819°C

Predicted Ae1717°C

Predicted Acm399°C

Predicted Bs568°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

Transformation point Ac1724°CExact

Transformation point Ac3845°CExact · Ac3(Acm)

Transformation point Ar3815°CExact · Ar3(Arcm)

Transformation point Ar1682°CExact

Weldabilityreadily weldableAs published: without limitations.

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

5 conditions · 87 values

By delivery stateno delivery state statedsource splav

Delivery state	RmN/mm²	ReN/mm²	A5%	Z%	KCUkJ/m²	HB
Pipe hot strain, GOST 550-75	431	255	22	50	780	—
Pipe, GOST 8731-87	412	245	21	—	—	—
Pipe, GOST 10705-80	372	225	22	—	—	—
Rolled stock cold-worked , GOST 1050-88	490	—	7	40	—	—
Rolled stock annealed , GOST 1050-88	390	—	21	50	—	—
Band annealed , GOST 2284-79	310 – 540	—	18	—	—	—
Band cold-worked , GOST 2284-79	490 – 830	—	—	—	—	—
(annealing) , GOST 1050-88	—	—	—	—	—	163
(cold-drawn, cold-worked) , GOST 1050-88	—	—	—	—	—	207
Sheet GOST 4041-71	—	—	—	—	—	127
Pipe GOST 550-75	—	—	—	—	—	156
Pipe GOST 8731-87	—	—	—	—	—	156
Sheet trick GOST 1577-93	—	—	—	—	—	156

By thicknessno delivery state statedsource steelnumber

Thicknessmm	ReHN/mm²
≤ 16	235
16 – 40	225
40 – 60	215

By dimensionno delivery state statedsource splav

Dimensionmm	RmN/mm²	A5%
4 - 14	340 – 490	28

By dimensionNormalizingsource splav

Dimensionmm	RmN/mm²	ReN/mm²	A5%	Z%
to 80	410	245	25	55

At temperatureno delivery state statedsource splav

Temperature°C	Densityg/cm³	Elastic modulusGPa	Thermal expansion coefficient10^-6/K	Thermal conductivityW/(m·K)	Specific heat capacityJ/(kg·K)	Electrical resistivitynΩ·m
20	7.859	213	—	52	—	—
100	7.834	203	11.6	50.6	486	219
200	7.803	199	12.6	48.6	498	292
300	7.77	190	13.1	46.2	514	381
400	7.736	182	13.6	42.8	533	487
500	7.699	172	14.1	39.1	555	601
600	7.659	160	14.6	35.8	584	758
700	7.617	—	14.8	32	636	925
800	7.624	—	12.9	—	703	1094
900	7.6	—	—	—	703	1135
1000	—	—	—	—	695	—

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.

E2601.0220

Mn ≤1,20 · Si ≤0,35