DIN / EN · Europe · 11 designations

46Si7

46Si7 is a material in the category Spring steels, held under material number 1.5024. We list 10 designations recorded for this grade, in the standards AISI / SAE, AFNOR, GOST, ČSN, PN and SRPS. Its recorded composition includes C 0.42–0.5%, Si 1.5–1.8%, P 0.025%, S 0.025% and Mn 0.5–0.8%. Recorded mechanical properties include HB 230–280; these figures vary with the delivery condition and dimension. Its recorded density is 7.45 g/cm³.

Material no. 1.5024
Category Spring steels · 52 grades
Designations 11

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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

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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

DIN / ENEurope · 1

46Si7This grade’s own name

AISI / SAEUnited States · 1

9250This grade’s own name

AFNORFrance · 1

45S7This grade’s own name

GOSTRussia / CIS · 2

ČSNCzechia · 2

PNPoland · 3

SRPSSerbia · 1

Č.2131Indicative

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 — 97.2 %Si — 1.7 %Mn — 0.7 %C — 0.5 %Traces & impurities · 0.1 %

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

Element	% by weight
	0.42–0.5
	1.5–1.8
	0.5–0.8
	0.025
	0.025
	0.007

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	0,42-0,50	0.420	0.500	Range
N	0,007	0.007	0.007	Exact
Si	1,50-1,80	1.500	1.800	Range
P	0,025	0.025	0.025	Exact
S	0,025	0.025	0.025	Exact
Mn	0,50-0,80	0.500	0.800	Range

Cu+10Sn ≤0,60
Cu+10Sn ≤0,60
Cu+10Sn ≤0,60

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

Density7,45g/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

3 conditions · 3 values

By delivery stateTreated to improve shearabilitysource steelnumber

Delivery state	HB
Treated to improve shearability	280

By delivery stateSoft annealedsource steelnumber

Delivery state	HB
Soft annealed	248

By delivery stateAnnealed to achieve spheroidization of the carbidessource steelnumber

Delivery state	HB
Annealed to achieve spheroidization of the carbides	230

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 1.5, a shared category, and a published range for Si / Mn 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.

38Si71.5023

Si 1,50-1,80 · Mn 0,50-0,80