Material number · Europe · 1 designation

1.3347

1.3347 is the material number of the grade also listed as HS7-5-3. It is a material in the category High-speed steels. We list 1 designations recorded for this grade, in the standards DIN / EN.

Material no. 1.3347
Category High-speed steels · 59 grades
Designations 1

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If you came for one of these

The most-used names for this grade.

DIN / ENHS7-5-3This grade’s own name

About High-speed steels

High-speed steels are alloyed tool steels designed to retain hardness and cutting ability when tools heat up during high-speed machining. Their hot hardness and wear resistance make them suitable for cutting tools such as drills, milling cutters, taps and broaches.

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

Also known as

1 designations · 1 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

HS7-5-3This grade’s own name

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

Chemical composition

9 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 78.8 %W — 7.3 %Mo — 5.3 %Cr — 4 %Traces & impurities · 4.6 %

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

Element	% by weight
	1.16–1.2
	0.2–0.55
	0.2–0.4
	0.03
	0.03
	3.8–4.2
	5.1–5.5
	2.6–2.8
	7–7.5

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	1,16-1,20	1.160	1.200	Range
Si	0,20-0,55	0.200	0.550	Range
P	0,03	0.030	0.030	Exact
S	0,03	0.030	0.030	Exact
V	2,60-2,80	2.600	2.800	Range
Cr	3,80-4,20	3.800	4.200	Range
Mn	0,20-0,40	0.200	0.400	Range
Mo	5,10-5,50	5.100	5.500	Range
W	7,00-7,50	7.000	7.500	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.

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.

Looking for this grade under another name?

Search the catalogue by designation, material number or composition — every name on this page is itself a way in.

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