PN · Poland · 42 designations

D70

D70 is a designation in PN for the material held under material number 1.1231, also listed as C67S. It is a material in the category Spring steels. We list 42 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, ISO, JIS, GB, GOST, UNI, SS, ČSN, ABNT NBR, COPANT, STN, PN, AS / NZS, STAS and BDS.

Material no. 1.1231
Category Spring steels · 52 grades
Designations 42

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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

42 designations · 19 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

UNSUnited States · 1

G10700This grade’s own name

AISI / SAEUnited States · 8

BSUnited Kingdom · 3

AFNORFrance · 4

ISOInternational · 1

CS65Indicative

JISJapan · 3

GBChina · 2

GOSTRussia / CIS · 4

UNIItaly · 1

C70Indicative

SSSweden · 1

1770Indicative

ČSNCzechia · 2

ABNT NBRBrazil · 1

1070Indicative

COPANTLatin America · 1

1070Indicative

STNSlovakia · 1

12061Indicative

PNPoland · 2

D70Indicative
gat. 65Indicative

AS / NZSAustralia / New Zealand · 2

STASRomania · 2

BDSBulgaria · 1

70Indicative

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

Chemical composition

8 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 97.4 %Mn — 0.8 %C — 0.7 %Cr — 0.4 %Traces & impurities · 0.8 %

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

Element	% by weight
	0.65–0.73
	0.15–0.35
	0.6–0.9
	0.025
	0.025
	≤ 0.4
	≤ 0.1
	≤ 0.4

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	0,65-0,73	0.650	0.730	Range
Si	0,15-0,35	0.150	0.350	Range
P	0,025	0.025	0.025	Exact
S	0,025	0.025	0.025	Exact
Cr	≤0,40	—	0.400	Max
Mn	0,60-0,90	0.600	0.900	Range
Ni	≤0,40	—	0.400	Max
Mo	≤0,10	—	0.100	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

This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here.

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.

Properties by condition

6 conditions · 7 values

By thicknessSoft annealedsource steelnumber

Thicknessmm	RmN/mm²	A80%
0.3 – 3	640	16

By thicknessCold rolledsource steelnumber

Thicknessmm	RmN/mm²
0.3 – 3	1140

By thicknessQuenched and temperedsource steelnumber

Thicknessmm	RmN/mm²
0.3 – 3	1200 – 1900

By delivery stateSoft annealedsource steelnumber

Delivery state	HV
Soft annealed	200

By delivery stateCold rolledsource steelnumber

Delivery state	HV
Cold rolled	315

By delivery stateQuenched and temperedsource steelnumber

Delivery state	HV
Quenched and tempered	370 – 580

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 1.1, 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.

C60S1.1211

Mn 0,60-0,90 · Si 0,15-0,35