GOST 9567-75 Precision steel tubes
This standard is applied to steel pipes of particular accuracy after cold drawing or hot rolling.
Cold drawing pipes are produced of the following length:
Not fixed length - from 1 to 11.5 m
Fixed length - from 4.5 to 9 m.
Length multiplied fixed length - up to 9 m with allowance 5 mm for each cutting. Per customer request it can be stated another allowance.
Max length deviation for fixed and multiple length are to be + 10 mm.
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roduction type of pipes
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Max deviations
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Outside diameter
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Wall thickness
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Sizes, mm
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Deviations
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Sizes, mm
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Deviations
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Cold drawn pipes
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Up to 30 including
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± 0,10 mm
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For pipes with OD 6 - 108 mm
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Over 30 up to 40 including
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± 0,15 mm
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Up to 0,8 including
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± 0,05 mm
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Over 40 up to 50 including
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± 0,20 mm
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Over 0,8 up to 5 including
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± 7,5
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Over 50 up to 60 including
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± 0,25 mm
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Over 5
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± 6%
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Over 60 up to 70 including
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± 0,30 mm
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For pipes with OD over 110 mm
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Over 70 up to 80 including
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± 0,35 mm
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Up to 2,5 including
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± 10%
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Over 80 up to 90 including
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± 0,40 mm
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Over 2,5 up to 5 including
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+ 10%, -7,5%
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Over 90 up to 108 including
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± 0,45 mm
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Over 5
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± 7,5%
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Over 108 up to 120 including
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± 0,50 mm
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Over 120
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± 0,8 %
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Hot rolled pipes
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Up to 50 including
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± 0,35 mm
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Up to 15 including
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± 10%
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Over 50
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± 0,8%
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Over 15
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± 8%
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If D/S = 4 - 10
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± 6%
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Mechanical composition
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Steel grade
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Tensile strength, N/mm2 (min)
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Yield strength, N/mm2 (min)
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Elongation, % (min)
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10
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343
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206
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24
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20
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412
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245
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21
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35
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510
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294
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17
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45
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589
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323
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14
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40Х
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618
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-
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14
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30ХГСА
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491
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-
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18
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Chemical composition (%, max)
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Steel grade
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C
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Si
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Mn
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Cr
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Ni
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Mo
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S
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P
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Cu
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10
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0,07-0,14
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0,17-0,37
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0,35-0,65
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0,15
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0,3
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-
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-
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-
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-
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20
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0,17-0,24
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0,17-0,37
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0,35-0,65
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0,25
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0,25
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-
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0,03
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0,025
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0,3
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35
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0,32-0,40
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0,17-0,37
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0,50-0,80
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0,25
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0,3
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-
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0,04
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0,035
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0,3
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45
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0,42-0,45
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0,17-0,37
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0,50-0,80
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0,25
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-
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-
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-
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-
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-
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40Х
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0,36-0,44
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0,17-0,37
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0,50-0,80
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0,80-1,10
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0,3
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-
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0,035
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0,035
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0,3
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30ХГСА
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0,28-0,34
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0,90-1,20
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0,80-1,10
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0,80-1,10
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0,3
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-
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0,005
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0,025
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-
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