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GOST 8732

Author:jenny Date:2010/9/9 8:05:49

GOST 8732,8731

CHEMICAL PROPERTIES

Steel Grade

Chemical composition (by %)

C

Mn

Si

P (max)

S (Max)

Cr (max)

10

1,07 - 0,14

0,35 - 0,65

0,17 - 0,37

0,035

0,04

0,15

20

0,17 - 0,24

0,35 - 0,65

0,17 - 0,37

0,035

0,04

0,25

35

0,32 - 0,40

0,50 - 0,80

0,17 - 0,37

0,035

0,04

0,25

45

0,42 - 0,50

0,50 - 0,80

0,17 - 0,37

0,035

0,04

0,25

20X

0,17 - 0,23

0,50 - 0,80

0,17 - 0,37

0,035

0,035

0,70 - 1,00

MECHANICAL PROPERTIES

Steel Grade

Tensile Strength (Mpa)

Yield Strength (Mpa)

Elongation (by %)

10

353

216

24

20

412

245

21

35

510

294

17

45

588

323

14

20X

431

-

16

SIZE TOLERANCE

External Diameter

Tolerance %

Wall Thickness

Tolerance %

 

High Accuracy

Ordinary Accuracy

High Accuracy

Ordinary Accuracy

to 219 inc.

+/- 0,8

+/- 1,0

to 15 inc.

+/- 12,5

-15,0 / +12,5

above 15 to 30

-12,5 / +10

+/- 12,5

30 and above

+/- 10,0

-12,5 / +10,5

above 219

+/- 1,0

+/- 1,25

to 15 inc.

-15,0 / +12,5

above 15 to 30

- / + 12,5

30 and above

-12,5 / +10,00



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