Material number · Europe · 9 designations

1.7138

1.7138 is the material number of the grade also listed as 52MnCrB3. It is a material in the category Spring steels. We list 9 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ISO and JIS.

Material no. 1.7138
Category Spring steels · 52 grades
Designations 9

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If you came for one of these

The most-used names for this grade.

About Spring steels

Spring steels are alloy steels designed to store and release elastic energy repeatedly without permanent deformation. They are characterised by a combination of strength, hardness and resilience, making them suitable for springs, clips, washers and other components subjected to repeated flexing or shock.

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

Also known as

9 designations · 5 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

52MnCrB3This grade’s own name

UNSUnited States · 3

AISI / SAEUnited States · 3

ISOInternational · 1

60CrB3Indicative

JISJapan · 1

SUP11AIndicative

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

Chemical composition

7 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.8 %Mn — 0.9 %C — 0.5 %Cr — 0.5 %Traces & impurities · 0.3 %

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

Element	% by weight
	0.48–0.55
	0.15–0.35
	0.75–1
	0.035
	0.035
	0.4–0.6
	≥ 0.0008

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
B	≥0,0008	0.001	—	Min
C	0,48-0,55	0.480	0.550	Range
Si	0,15-0,35	0.150	0.350	Range
P	0,035	0.035	0.035	Exact
S	0,035	0.035	0.035	Exact
Cr	0,40-0,60	0.400	0.600	Range
Mn	0,75-1,00	0.750	1.000	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: Ni, 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.

Similar grades — and why

Selection rule, stated so you can disagree with it: same number class 1.7, a shared category, and a published range for Mn / 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.

56SiCr71.7106

Mn 0,70-1,00 · Cr 0,20-0,45