gost 800 - 78

7/30/2019 GOST 800 - 78

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Hot-rolled seamless steel tubes for ball bearing production acc. to

GOST 800-78

Chemical composition

Steel grade

Мass percentage of elements, %

C Mn Si Cr S P Ni Cu

max.

ШХ15 0.95–1.05 0.20–0.40 0.17–0.37 1.30–1.65 0.020 0.027 0.30 0.25

ШХ15СГ 0.95–1.05 0.90–1.20 0.40–0.65 1.30–1.65 0.020 0.027 0.30 0.25

Tube dimensions

OD, mm Wall thickness, mmMax. permissible deviation of

outside diameter

31.1 4.1; 6.0;42.4 4.1; 7.1; 8.0

59.6 4.1; 7.1; 10.0; 11.7

70.0 10.0

79.0 14.0

81.0 8.0; 11.5

83.8 8.0; 11.5

90.0 18.0

91.4 20.0

113.0 20.0

130.4 11.0; 20.6

139.5 11.0; 20.6;

+ 0.2 mm

Max. permissible deviations of wall thickness

Wall thickness ranges Deviation in %

Wall thickness < 5.0 mm ± 6.5%

5.0 mm ≤ wall thickness < 7.0 mm ± 6.0%

7.0 mm ≤ wall thickness <10.0 mm

± 5.0%


± 4.0%

Wall thickness ≥ 13.0 mm ± 3.5%

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The tubes are supplied in lengths from 6 to 14.6 m, tied into hexagon bundles, with

dimensions from 300×260 mm to 700×610 mm and a weight of up to max. 5 tons. The tube ends

are processed with bevels 1 to 3 mm in width.

Hot-rolled seamless steel tubes for mechanical engineering, made from unalloyed

and low-alloy steel grades acc. to GOST 8731, GOST 8732, GOST 23270, DINEN 10297-1, DIN 1629, DIN 1630, DIN EN 10216-1.

Chemical composition of unalloyed steel grades acc. to GOST 8731

Steel grade

Mass percentage of elements, %

C Mn SiP S Cr

max.

10 0.07–0.14 0.35–0.65 0.17–0.37 0.035 0.040 0.15

20 0.17–0.24 0.35–0.65 0.17–0.37 0.035 0.040 0.25

35 0.32–0.40 0.50–0.80 0.17–0.37 0.035 0.040 0.2545 0.42–0.50 0.50–0.80 0.17–0.37 0.035 0.040 0.25

Chemical composition of steel grades acc. to DIN EN 10297-1

Steel

grade

Material

number

Mass percentage of elements, %, max.

С Si Mn P S

min. max. min. max. min. max. max.

Е235 1.0308 - 0.17 - 0.35 - 1.20 0.030 0.035

Е275 1.0225 - 0.21 - 0.35 - 1.40 0.030 0.035

Е315 1.0236 - 0.21 - 0.30 - 1.50 0.030 0.035

Е355 1.0580 - 0.22 - 0.55 - 1.60 0.030 0.035

Е470 1.0536 0.16 0.22 0.10 0.50 1.30 1.70 0.030 0.035

С22Е 1.1151 0.17 0.24 - 0.40 0.40 0.70 0.035 0.035

С35Е 1.1181 0.32 0.39 - 0.40 0.50 0.80 0.035 0.035

С45Е 1.1191 0.42 0.50 - 0.40 0.50 0.80 0.035 0.035

С60Е 1.1221 0.57 0.65 - 0.40 0.60 0.90 0.035 0.035

Chemical composition of steel grades acc. to DIN 1629

Steel

grade

Material

number


C P S N Al min Si MnSt 37.0 1.0254 0.17 0.040 0.040 0.009 - - -

St 44.0 1.0256 0.21 0.040 0.040 0.009 - - -

St 52.0 1.0421 0.22 0.040 0.035 - 0.020 0.55 1.60

Chemical composition of steel grades acc. to DIN 1630

Steel

grade

Material

number


C P S Al min Si Mn

St 37.4 1.0255 0.17 0.040 0.040 0.020 0.35 min 0.35

St 44.4 1.0257 0.20 0.040 0.040 0.020 0.35 min 0.40St 52.4 1.0581 0.22 0.040 0.035 0.020 0.55 1.60

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Steel gradeMaterial

number


C Si Mn P SAlgen.

minCr

P195TR2 1.0108 0.13 0.35 0.70 0.025 0.020 0.020 0.30

P235TR2 1.0255 0.16 0.35 1.20 0.025 0.020 0.020 0.30P265TR2 1.0259 0.20 0.40 1.40 0.025 0.020 0.020 0.30

Steel gradeMaterial

number


Cu Mo Nb Ni Ti V Cr+Cu+Mo+Ni

P195TR2 1.0108 0.30 0.08 0.01 0.30 0.04 0.02 0.70

P235TR2 1.0255 0.30 0.08 0.01 0.30 0.04 0.02 0.70

P265TR2 1.0259 0.30 0.08 0.01 0.30 0.04 0.02 0.70

Tubes can also be manufactured from other low-alloy steels acc. to GOST 4543 (or analogous)

or other Russian and foreign standards: 25ХГСА–35ХГСА, 30ХМА, 36Г2С, 12ХН2,

38Х2МЮА, 10Г2–15Г2, 15Х–35Х, 40Х, 45Х, 15ХМ–20ХМ, 30ХНМА–38ХНМА,40ХМФА, 30Г2, 09Г2С, Ст1сп–Ст6сп, S355J2G3, 20ХНР, К, Кmod, 15ХА–38ХА, 12ХН–

40ХН, 12ХН3А–30ХН3А, 12Х2Н4А–20Х2Н4А, 20ХГНР, 45ХН–50ХН, 18Х2Н4МА–

25Х2Н4МА, 30ХМА, 30ХГС, 30ХГСН2А, 40Х2Н2МА, 38ХГН, 36Х2Н2МФА, 20ХН4ФА,

38ХН3МФА, 42CrMo4, C45E–C60E, 34CrMo4.

Mechanical properties of tubes acc. to GOST 8731

Steel grade

Tensile strength,

σв, N/mm2

Yield point,

σт, N/mm2

Elongation after fracture,

δ5, %

min.

10 353 216 24

20 412 245 21

30 510 294 17

45 588 323 14

15ХМ 431 225 21

30ХМА 588 392 13

12ХН2 539 392 14

Mechanical properties of tubes acc. to DIN 1629

Steel gradeTensile strength,

N/mm2

Yield point, N/mm2 Elongation after fracture, %

S≤16* 16<S≤32Longitudinal test

specimen

Transverse test

specimen

min.

St 37.0 350–480 235 225 25 23

St 44.0 420–550 275 265 21 19

St 52.0 500–650 355 345 21 19

Note * S—wall thickness

Mechanical properties of tubes acc. to DIN 1630

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Steel gradeTensile strength,

N/mm2

Yield point, N/mm2 Elongation after fracture, %

S≤16* 16<S≤32Longitudinaltest specimen

Transverse testspecimen

min.

St 37.4 350–480 235 225 25 23

St 44.4 420–550 275 265 21 19

St 52.4 500–650 355 345 21 19 Note: * S—wall thickness

Mechanical properties of tubes acc. to DIN EN 10216-1

Steel

gradeYield

strength

Yield point, Н/mm2 Elongation after

fracture, %

Values of energy absorbed

in J, for V-shaped notched

specimens, at temperatures

˚С

S≤16 16<S≤40

Longitudinal

test specimen

Trans

verse

testspeci

men

Longitudinal test

specimen

Transverse

test

specimen0 –10 0

min.

P195TR2 320–440 195 185 27 25 40 28 27

P235TR2 360–500 235 225 25 23 40 28 27

P265TR2 410–570 265 255 21 19 40 28 27

Note: * S—wall thickness

Geometrical dimensions of tubes

OD, mm Wall thickness, mm Max. permissible deviations of outside diameter

21.3 2.3; 2.6; 2.8; 3.6; 4.0; 5.0

26.9 2.3; 2.8; 4.0; 5.0; 5.5

30.0 2.3; 2.8; 5.0; 6.0

31.8 2.3; 2.8; 4.0; 6.0

33.7 2.5; 4.0; 6.0

50.0 3.2; 6.0

51.0 4.0; 6.0; 10.0

60.3

73.076.1 4.0; 6.0; 10.0

88.9 3.8; 6.3; 12.5; 20.0

± 0.3 mm

108.0 3.8; 6.3; 12.5; 20.0; 20.6

114.3 4.0; 6.3; 12.5; 20.0; 22.2

121.0 5.0; 8.8; 14.2; 24.0

139.7 5.5; 8.8; 14.2; 25.0

146.0 25.0

168.3 6.0; 8.8; 14.2; 24.0

± 0.3%

The tubes are supplied in lengths from 6 to 14.6 m, tied into hexagon bundles with dimensions

from 300×260 mm to 700×610 mm and a weight of up to max. 5 tons.


7/30/2019 GOST 800 - 78


Wall thickness ranges Values of deviation



7.0 mm ≤ wall thickness <

10.0 mm± 5.0%

10.0 mm ≤ Wall thickness <

13.0 mm± 4.0%


At the customer's request, tubes can be subjected to various types of heat treatment:

normalising, quenching, tempering, quenching+tempering, normalising+tempering. At the

customer's request, tubes can be provided with anticorrosive coating and tube plugs.

Hot-rolled seamless steel tubes for steam boilers and steam boiler piping

acc. to GOST 8732-78. ISO 1129. DIN EN 10216-2.

Tubes can also be manufactured from other low-alloy steels acc. to GOST 4543 (or

analogous) or other Russian and foreign standards: 25ХГСА–35ХГСА, 30ХМА, 36Г2С,

12ХН2, 38Х2МЮА, 10Г2–15Г2, 15Х–35Х, 40Х, 45Х, 15ХМ–20ХМ, 30ХНМА–38ХНМА,

40ХМФА, 30Г2, 09Г2С, Ст1сп–Ст6сп, S355J2G3, 20ХНР, К, Кmod, 15ХА–38ХА. 12ХН–

40ХН, 12ХН3А–30ХН3А, 12Х2Н4А–20Х2Н4А, 20ХГНР, 45ХН–50ХН, 18Х2Н4МА–

25Х2Н4МА, 30ХМА, 30ХГС, 30ХГСН2А, 40Х2Н2МА, 38ХГН, 36Х2Н2МФА, 20ХН4ФА,

38ХН3МФА, 42CrMo4, C45E–C60E, 34CrMo4.

Chemical composition of steel grades acc. to DIN EN 10216-2.

Steel

grade

Material

number


C Si Mn P S Almin Cr

P235GH 1.0345 0.16 0.35 1.20 0.025 0.020 0.020 0.30

P265GH 1.0425 0.20 0.40 1.40 0.025 0.020 0.020 0.30

Steel

grade

Material

number


Cu Mo Nb Ni Ti V Cr+Cu+Mo+Ni

P235GH 1.0345 0.30 0.08 0.01 0.30 0.04 0.02 0.70

P265GH 1.0425 0.30 0.08 0.01 0.30 0.04 0.02 0.70

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Меchanical properties acc. to DIN EN 10216-2.

Steel

grade

Yield

strength,

N/mm2

Yield point, Н/

mm2

Elongation after

fracture, %

Values of energy absorbed in J,

for V-shaped notched specimens,

at temperatures ˚С

S≤16 16<S≤40

Longitu-

dinal testspecimen

Trans-

verse testspecimen

Longitudinal

test specimen

Transverse test

specimen20 0 –10 20 0

min.

P235GH 360–500 235 225 25 23 - 40 28 - 27

P265GH 410–570 265 255 23 21 - 40 28 - 27

Geometrical dimensions of tubes

OD, mm Wall thickness, mmMax. permissible deviations of

outside diameter

32.0 3.0; 6.0

38.0 2.5; 6.0; 8.0; 11.4

42.0 2.5; 3.0; 6.0; 8.0

51.0 3.2; 6.0; 10.0; 11.5

52.4 3.2; 6.0; 10.0; 11.5

60.3 3.5; 6.0; 10.0; 11.7

73.0 3.5; 6.0; 9.0; 11.0

76.0 3.5; 6.0; 9.0; 11.0

83.0 4.0; 6.0; 9.0; 11.0; 11.7

± 0.3 mm

114.0 3.8; 6.0; 9.0; 11.0; 16.0; 18.0

121.0 5.0; 9.0; 14.0; 19.0

146.0 5.0; 9.0; 14.0; 19.0168.3 5.0; 9.0;14.0; 19.0

± 0.3%








± 5.0%


± 4.0%


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Hot-rolled seamless steel tubes for oil and gas lines without threads acc.

to GOST 550-75, ISO 3183, API 5L DIN EN 10208-1.

Chemical composition of steel grades acc. to API 5L

Steel gradeMass percentage of elements, %, max.

C Mn P S

A25, Cl 1 0.21 0.60 0.030 0.030

A 0.22 0.90 0.030 0.030

B 0.28 1.20 0.030 0.030

X42 0.28 1.30 0.030 0.030

X46 0.28 1.40 0.030 0.030

X52 0.28 1.40 0.030 0.030

Chemical composition of steel grades acc. to GOST 550-75, Group "Б"

Steel grade

Mass percentage of elements, %

C Si MnP S Cr

max.

10 0.07–0.14 0.17–0.37 0.35–0.65 0.035 0.040 0.15

20 0.17–0.24 0.17–0.37 0.35–0.65 0.035 0.040 0.25

10Г2 0.07–0.15 0.17–0.37 1.20–1.60 0.035 0.035 0.30

Chemical composition of steel grades acc. to ISO 3183

Steel

grade


C Si Mn P S V Nb Ti С–equiv.

L245NB 0.16 0.40 1.1 0.025 0.020 - - - 0.42

L290NB 0.17 0.40 1.2 0.025 0.020 0.05 0.05 0.04 0.42

L360NB 0.20 0.45 1.6 0.025 0.020 0.10 0.05 0.04 0.45

L415NB 0.21 0.45 1.6 0.025 0.020 0.15 0.05 0.04 -

L360QB 0.16 0.45 1.4 0.025 0.020 0.05 0.05 0.04 0.42

L415QB 0.16 0.45 1.6 0.025 0.020 0.08 0.05 0.04 0.43

L450QB 0.16 0.45 1.6 0.025 0.020 0.09 0.05 0.06 0.45

L485QB 0.16 0.45 1.7 0.025 0.020 0.10 0.05 0.06 0.45

L555QB 0.16 0.45 1.8 0.025 0.020 0.10 0.05 0.06 -The total of V, Nb, Ti must not exceed 0.15%.


Steel gradeMaterial

number


C Si Mn P S

L210GA 1.0319 0.21 0.40 0.90 0.030 0.030

L235GA 1.0458 0.16 0.40 1.20 0.030 0.030

L245GA 1.0459 0.20 0.40 1.15 0.030 0.030

L290GA 1.0483 0.20 0.40 1.40 0.030 0.030L360GA 1.0499 0.22 0.55 1.45 0.030 0.030 Note: Content of Algen. from 0.015% up to and including 0.060%;

steel grades L210GA, L235GA, L245GA must not contain any other elements;

7/30/2019 GOST 800 - 78


in steel grades L290GA and L360GA the total of V, Nb and Ti must be max 0.15%.

Mechanical properties acc. to API 5L

Steel gradeTensile strength,. N/mm2 Yield point,. N/mm2 Elongation after fracture,

%

min.

A25, Cl 1 310 172A 331 207

B 414 241

X42 414 290

X46 434 317

X52 455 359

Calculated values

Mechanical properties acc. to GOST 550-75

Steel gradeTensile strength, N/

mm2 Yield point, N/mm2 Elongation after

fracture, %

Impact strength,

J/см3 *

min.10 353 216 25 78

20 431 255 22 78

10Г2 421 265 21 118

Note: *—for pipes with wall thicknesses of min. 12.0 mm

Mechanical properties acc. to ISO 3183

Steel gradeYield point σ0.5,

N/mm2

Yield strength

σВ, N/mm2, min.σ0.5/σт, max.

Elongation after

fracture, %, min.

L245NB 245–440 415 0.80 22

L290NB 290–440 415 0.85 21

L360NB 360–550 460 0.85 20

L415NB 415–565 520 0.85 18

L360QB 360–550 460 0.88 20

L415QB 415–565 520 0.88 18

L450QB 450–570 535 0.90 18

L485QB 485–605 570 0.90 18

L555QB 555–675 625 0.90 18

Mechanical properties acc. to DIN EN 10208-1

Steel gradeMaterial

number

Yield point, Н/

mm2

min.

Tensile

strength

Н/mm2

min.

Elongation after fracture, %,

min.

Longitudinal

test

specimen

Transverse

test

specimen

L210GA 1.0319 210 335 25 27

L235GA 1.0458 235 370 23 25

L245GA 1.0459 245 415 22 24

L290GA 1.0483 290 415 21 23

L360GA 1.0499 360 460 20 22

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Mechanical properties

OD, mm Wall thickness, mmMax. permissible deviations of outside

diameter

51.0 4.0; 5.5

57.0 4.0; 5.5

60.0 4.0; 6.0

73.0 4.0; 6.076.0

88.94.0; 7.0

± 0.3 mm

101.6

114.34.0; 7.0

121.0 5.0; 7.1; 9.2

139.7 5.0; 7.1; 9.2

141.3

168.05.0; 7.0

± 0.3%








10.0 mm± 5.0%


13.0 mm± 4.0%


gost 800 - 78

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