GOST · Russia / CIS · 33 designations

ПК10-6.8

ПК10-6.8 is a designation in GOST for the material held under material number 1.0310, also listed as C10D. It is a material in the category Unalloyed structural steels. We list 33 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, JIS, GB and GOST.

Material no. 1.0310
Category Unalloyed structural steels · 452 grades
Designations 33

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If you came for one of these

The most-used names for this grade.

About Unalloyed structural steels

Unalloyed structural steels include all low-carbon steels in which the iron companions do not exceed specified minimum values. The yield strength, formability and weldability are the decisive factors for their use. They are soft, pliable, tough and stretchy, but cannot be hardened by heat treatment.

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

Also known as

33 designations · 6 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Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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

C10DThis grade’s own name

UNSUnited States · 1

G10100This grade’s own name

AISI / SAEUnited States · 1

1010This grade’s own name

JISJapan · 1

S10CIndicative

GBChina · 1

10This 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

10 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 98.3 %Mn — 0.4 %Si — 0.3 %Cu — 0.3 %Traces & impurities · 0.7 %

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

Element	% by weight
	0.08–0.13
	≤ 0.3
	0.3–0.6
	0.035
	0.035
	≤ 0.2
	≤ 0.05
	≤ 0.25
	≤ 0.3
	≤ 0.01

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	0,08-0,13	0.080	0.130	Range
Al	≤0,01	—	0.010	Max
Si	≤0,30	—	0.300	Max
P	0,035	0.035	0.035	Exact
S	0,035	0.035	0.035	Exact
Cr	≤0,20	—	0.200	Max
Mn	0,30-0,60	0.300	0.600	Range
Ni	≤0,25	—	0.250	Max
Cu	≤0,30	—	0.300	Max
Mo	≤0,05	—	0.050	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

computed from composition · °C

Predicted Ae3831°C

Predicted Ae1722°C

Predicted Acm363°C

Predicted Bs596°C

These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either.

Physical & mechanical properties

Density7,85g/cm³Exact

Transformation point Ac1724°CExact

Transformation point Ac3876°CExact · Ac3(Acm)

Transformation point Ar3850°CExact · Ar3(Arcm)

Transformation point Ar1682°CExact

Weldabilityreadily weldableAs published: without limitations.

Flake sensitivitynot susceptibleAs published: not 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

5 conditions · 94 values

By delivery stateno delivery state statedsource splav

Delivery state	RmN/mm²	ReN/mm²	A5%	Z%	KCUkJ/m²	HB
Pipe hot strain, GOST 550-75	353	216	25	50	780	—
Pipe, GOST 8731-87	353	216	24	—	—	—
Pipe, GOST 10705-80	314	196	25	—	—	—
Rolled stock cold-worked , GOST 1050-88	410	—	8	50	—	—
Rolled stock annealed , GOST 1050-88	290	—	26	55	—	—
Rolled stock, GOST 10702-78	390	—	8	50	—	—
(cold-drawn, cold-worked) , GOST 1050-88	—	—	—	—	—	187
(hot-rolled) , GOST 1050-88	—	—	—	—	—	143
Sheet GOST 4041-71	—	—	—	—	—	117
Pipe GOST 8731-87	—	—	—	—	—	137
Pipe GOST 550-75	—	—	—	—	—	137
Bar GOST 10702-78	—	—	—	—	—	115

By dimensionno delivery state statedsource caishuku

Wall thicknessmm	RmN/mm²	A%
≤ 16	335 – 475	≥ 24
≥ 16	335 – 475	≥ 24

By dimensionno delivery state statedsource splav

Dimensionmm	RmN/mm²	A5%
4 - 14	290 – 420	32

By dimensionNormalizingsource splav

Dimensionmm	RmN/mm²	ReN/mm²	A5%	Z%
to 80	330	205	31	55

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)	Electrical resistivitynΩ·m
20	7.856	210	—	—	—	140
100	7.832	203	12.4	57	494	190
200	7.8	199	13.2	53	532	263
300	7.765	190	13.9	49.6	565	352
400	7.73	182	14.5	45	611	458
500	7.692	172	14.85	39.9	682	584
600	7.653	160	15.1	35.7	770	734
700	7.613	—	15.2	32	857	905
800	7.582	—	12.05	29	875	1081
900	7.594	—	14.08	27	795	1130
1000	—	—	12.6	—	666	—
1100	—	—	14.4	—	668	—

2 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition.

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 1.0, 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.

C4D1.0300

Mn 0,30-0,60 · Si ≤0,30