Material number · Europe · 38 designations

1.1221

1.1221 is the material number of the grade also listed as C60E. It is a material in the category Quenched and tempered steels. We list 38 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, ABNT NBR, STN, PN, HRN, MKE and MSZ.

Material no. 1.1221
Category Quenched and tempered steels · 133 grades
Designations 38

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If you came for one of these

The most-used names for this grade.

About Quenched and tempered steels

Quenched and tempered steels are heat-treated steels designed to combine high strength with useful toughness and ductility. They are used for heavily loaded components such as shafts, gears, fasteners and structural machine parts where resistance to mechanical stress is required.

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

Also known as

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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

UNSUnited States · 3

AISI / SAEUnited States · 3

BSUnited Kingdom · 6

AFNORFrance · 3

UNESpain · 3

ISOInternational · 1

C60E4Indicative

JISJapan · 1

S58CIndicative

GBChina · 2

GOSTRussia / CIS · 2

UNIItaly · 1

C60Indicative

SSSweden · 2

ČSNCzechia · 1

12061Indicative

ABNT NBRBrazil · 1

1060Indicative

STNSlovakia · 1

12 061Indicative

PNPoland · 2

HRNCroatia · 1

Č.1731Indicative

MKETürkiye · 1

Ç 1060Indicative

MSZHungary · 1

C 60Indicative

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 — 97.3 %Mn — 0.8 %C — 0.6 %Si — 0.4 %Traces & impurities · 1 %

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

Element	% by weight
	0.57–0.65
	≤ 0.4
	0.6–0.9
	0.03
	0.035
	≤ 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	0,57-0,65	0.570	0.650	Range
Si	≤0,40	—	0.400	Max
P	0,03	0.030	0.030	Exact
S	0,035	0.035	0.035	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

Transformation point Ac1725°CExact

Transformation point Ac3750°CExact · Ac3(Acm)

Transformation point Ar3745°CExact · Ar3(Arcm)

Transformation point Ar1690°CExact

Weldabilitynot suitable for weldingAs published: is not used.

Flake sensitivityslightly susceptibleAs published: weakly predisposed

Temper brittlenessnot susceptibleAs published: not predisposed

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

14 conditions · 68 values

By thicknessNormalizedsource steelnumber

Thicknessmm	RmN/mm²	A%
≤ 16	710	10
16 – 100	670	11
100 – 250	650	11
250 – 500	630	—
500 – 1000	620	—

By thicknessQuenched and temperedsource steelnumber

Thicknessmm	ReHN/mm²	RmN/mm²	A%
0.3 – 3	—	1150 – 1750	—
≤ 8	580	850	11
8 – 20	520	800	13
20 – 50	450	750	14
50 – 80	420	710	14

By thicknessCold drawn / hardsource steelnumber

Thicknessmm	RmN/mm²	A%
5 – 10	800 – 1150	5
10 – 16	780 – 1130	5
16 – 40	730 – 1100	6

By delivery stateno delivery state statedsource splav

Delivery state	RmN/mm²	A5%	HB
Band annealed , GOST 2284-79	440 – 740	10	—
Band cold-worked , GOST 2284-79	740 – 1130	—	—
Rolled stock GOST 1050-88	—	—	255

By thicknessSoft annealedsource steelnumber

Thicknessmm	RmN/mm²	A80%
0.3 – 3	620	17

By dimensionNormalizingsource splav

Dimensionmm	RmN/mm²	ReN/mm²	A5%	Z%
to 80	680	400	12	35

By heat-treated conditionno delivery state statedsource splav

Heat-treated condition	RmN/mm²	ReN/mm²	A5%	Z%
Steel	700	510	17	60

By dimensionQuenching 780 - 830°C, oil, Drawing 560°Csource splav

Dimensionmm	RmN/mm²	ReN/mm²	A5%	Z%	KCUkJ/m²
30	920	590	19	50	240

By delivery stateTreated to improve shearabilitysource steelnumber

Delivery state	HB
Treated to improve shearability	255

By delivery stateSoft annealedsource steelnumber

Delivery state	HB	HV
Soft annealed	241	195

By delivery stateAs rolled and turnedsource steelnumber

Delivery state	HB
As rolled and turned	198 – 278

By delivery stateCold rolledsource steelnumber

Delivery state	HV
Cold rolled	305

By delivery stateQuenched and temperedsource steelnumber

Delivery state	HV
Quenched and tempered	345 – 530

At temperatureno delivery state statedsource splav

Temperature°C	Densityg/cm³	Elastic modulusGPa	Thermal expansion coefficient10^-6/K	Thermal conductivityW/(m·K)	Specific heat capacityJ/(kg·K)
20	7.8	204	—	—	—
100	—	—	11	68	483
200	—	208	11.9	53	487
300	—	189	—	—	—
400	—	174	13.9	36	529
500	—	—	14.6	—	—
600	—	—	—	—	567

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.

Heat treatment

Supply condition

Annealing and Tempering and NormalizingSupply condition
NormalizingTest specimen sized=25

Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied.

Source: www.caishuku.com

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.

1.12031.1203

Mn 0,60-0,90 · Si ≤0,40