DIN / EN · Europe · 4 designations

Cf 70

Cf 70 is a designation in DIN / EN for the material held under material number 1.1249, also listed as C70G. It is a material in the category Steels for surface hardening. We list 4 designations recorded for this grade, in the standards DIN / EN, AISI / SAE and ČSN.

Material no. 1.1249
Category Steels for surface hardening · 13 grades
Designations 4

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About Steels for surface hardening

Steels for surface hardening are steels designed to develop a hard, wear-resistant surface while retaining a tougher interior. They are used for gears, shafts and other machine parts where resistance to surface wear is needed together with resistance to impact and bending.

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

Also known as

4 designations · 3 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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 · 2

C70GThis grade’s own nameWithdrawn
Cf 70This grade’s own nameWithdrawn

AISI / SAEUnited States · 1

1074Indicative

ČSNCzechia · 1

12081Indicative

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

Chemical composition

5 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 98.7 %C — 0.7 %Mn — 0.3 %Si — 0.3 %Traces & impurities · 0.1 %

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

Element	% by weight
	0.68–0.75
	0.15–0.35
	0.2–0.35
	0.025
	0.035

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	0,68-0,75	0.680	0.750	Range
Si	0,15-0,35	0.150	0.350	Range
P	0,025	0.025	0.025	Exact
S	0,035	0.035	0.035	Exact
Mn	0,20-0,35	0.200	0.350	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, Cr, Mo.

Physical & mechanical properties

Density7,66g/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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