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  • Cangzhou Steel Pipe Group (CSPG) Co., Ltd.
  • ADD:No.92 Jiefang East Rd., Cangzhou City, Hebei Province, China
  • TEL:+86-31-75673271
  • MOBILE:+8615373302068
  • E-MAIL:ella@cnspipe.com
  • Round Cold Drawn Seamless Steel Tube

    Some dimension Chemical composition of Material: Mechanical Property of Material Seamless mechanical steel tubing ASTM A519 Seamless mechanical tubing is manufactured from carbon and alloy steels for structural or other mechanical purposes involving machining or heat treating, where close...
    Product Details:

    Product

    Round ColdDrawn Seamless Steel Tube ASTM A106 Carbon and Alloy Steel pipe

    Material

    Carbon Steel/ non-Alloy Steel

    Section Shape

    Round

    Grade

    10#(St37.4,St35,St37,E235),20#(St45,St44,E255),45#(Ck45),16Mn(St52) and other special material.

    Standard

    DIN2391,EN10305-1,GB/T3639

    Certification

    ISO9001

    Technique

    Cold rolled & Cold drawn

    Application

    Widely used in automobiles, motorcycles, gas springs, hydraulic machinery,
     construction machinery and refrigeration industry.

    Supply Status

    BK, BKS, BKW,NBK, GBK

    Package

    Wrap in bundles with plastic woven bags

    Trade Terms

    T/T L/C

    Delivery Time 

    In time


    Some dimension

    40*50

    90*110

    140*170

    190*215

    40*55

    95*110

    145*170

    190*220

    50*60

    95*115

    150*170

    190*225

    50*65

    100*110

    150*175

    200*220

    55*70

    100*114

    150*180

    200*225

    60*70

    100*115

    155*180

    200*230

    60*75

    100*120

    160*175

    200*245

    60*78

    100*125

    160*180

    200*250

    63*73

    105*125

    160*185

    220*250

    63*75

    110*125

    160*190

    220*270

    63*76

    110*130

    160*195

    225*250

    63*78

    115*130

    165*190

    240*273

    65*80

    115*135

    165*205

    250*290

    70*80

    120*140

    170*200

    250*300

    70*82

    125*140

    180*200

    260*300

    70*85

    125*145

    180*205

    280*323

    70*90

    125*150

    180*210

    280*355

    75*90

    130*150

    180*215

    300*350

    80*92

    130*155

    180*220

    200*213

    80*95

    130*160

    185*205

    200*216

    80*100

    135*160

    185*215

    250*266

    85*100

    140*160

    185*220

     

    90*105

    140*165

    190*210

     


    Chemical composition of Material:

    Steel grade

    Chemical composition,%

    C

    Si

    Mn

    P

    S

    Cr

    St45 (20#)

    0.17-0.24

    0.17-0.37

    0.35-0.65

    0.035

    0.035

    0.25

    ST52(E355)

    ≤0.22

    ≤0.55

    ≤1.6

    0.025

    0.025

    0.25

    SAE1026

    0.22-0.28

    0.15-0.35

    0.6-0.9

    0.04

    0.05

    /

    STKM 13C

    ≤0.25

    ≤0.35

    0.3-0.9

    0.04

    0.04

    /

    Q345B

    ≤0.2

    ≤0.5

    1.0-1.6

    0.03

    0.03

    0.30

    CK45

    0.42-0.50

    0.17-0.37

    0.5-0.8

    0.035

    0.035

    0.25


    Mechanical Property of Material

    Delivery condition

    cold finished(hard)(BK)

    Cold drawn andstress-relieved(BK+S)

    Steel grade

    Rm MPa

    Elongation
     A5(%)

    Rm MPa

    ReH MPa

    Elonggation
     A5(%)

    St45

    ≥550

    ≥5

    ≥520

    ≥375

    ≥15

    20#

    ≥550

    ≥8

    ≥520

    ≥375

    ≥15

    St52 (E355)

    ≥640

    ≥5

    ≥600

    ≥520

    ≥14

    SAE1026

    ≥640

    ≥5

    ≥600

    ≥510

    ≥15

    STKM 13C

    ≥550

    ≥8

    ≥520

    ≥375

    ≥15

    Q345B

    ≥640

    ≥5

    ≥600

    ≥520

    ≥14

    CK45

    ≥640

    ≥5

    ≥600

    ≥520

    ≥10


    Seamless mechanical steel tubing

    ASTM A519

    Seamless mechanical tubing is manufactured from carbon and alloy steels for structural  or other mechanical purposes involving machining or heat treating, where close  tolerances, smooth finish, or definite physical properties are important  factors.

    Micro alloys available upon request. Reduce the weight of your product while increasing your physical requirements.

    Cold Drawn Seamless stocks are generally carried to OD and ID tolerances, except  when the ID is less than 50 percent of the OD. The latter sizes and hot  finished seamless stocks are carried in warehouse to OD and wall tolerances.

    SPECIAL NOTE: Tolerances are applicable only to two dimensions (length excepted). Thus, if OD and wall are specified, the theoretical ID may not conform to published tolerances except that the mean or average wall (taking into account the permissible OD and ID tolerances) will not vary more than indicated under & ldquo; DIAMETER AND WALL TOLERANCES.”

    EXAMPLE: If a cold drawn tube is specified 1-1/2 inch OD x 1-1/4 inch ID, one might expect the theoretical wall of 1/8 inch to be held to a variation of plus or minus 7-1/2 percent or within the limits of 0.116/0.134 inch.

    However, for a nominal OD of 1.500 inch, the OD may vary between 1.500 inch and 1.505 inch, and the ID may vary between 1.245 inch and 1.250 inch, which may result in an average or mean wall of 0.130 inch instead of 1/8 inch. Consequently, the  wall may vary plus or minus 7-1/2 percent from the mean of 0.130 inch, or within  limits of 0.120/0.140 inch. If, however, the average wall were 1/8 inch (0.125) reflecting 1.500 inch OD and 1.250 inch ID, the wall limits would be plus or minus 7-1/2 percent of 1/8 or 0.116/0.134 inch. Hence, any order of tubes might  vary in the entire lot as low as 0.116 inch on some and as high as 0.134 inch on others.


    COMPARATIVE DATA
     SEAMLESS CARBON STEELS

    Condition

    Nominal
     Yield
    Strength
    psi

    Nominal
     Ultimate
    Strength
    psi

    Nominal
     Elongation
     in 2%

    Equivalent
     Rockwell
     Hardness

    Equivalent
    Brinell
    Hardness

    GRADE 1018
    c .15/.20 Mn .60/90 P .40 max S.050 max

    Hot-Rolled

     35,000

    60,000

    30

    B-68

    116

    Normalized

     38,000

    58,000

    35

    B-66

    114

    Soft-Annealed

     33,000

    50,000

    40

    B-57

     97

    As-Drawn

     70,000

    85,000

    10

    B-87

    170

    CD-StressRelief Annealed

     60,000

    80,000

    15

    B-85

    163


    GRADE 1020
    C. 18/.23 Mn .30/.60 P .040 max S .050 max

    Hot-Rolled

     38,000

    60,000

    30

    B-68

    116

    Normalized

     40,000

    58,000

    35

    B-66

    114

    Soft-Annealed

     33,000

    53,000

    40

    B-62

    105

    As-Drawn

     65,000

    80,000

    10

    B-85

    163

    CD-StressRelief Annealed

     60,000

    75,000

    15

    B-81

    149


    GRADE 1026
    C .22/.28 Mn .60/.90 P .030 max S .050 max

    Hot-Rolled

     47,000

    70,000

    28

    B-77

    137

    Normalized

     50,000

    67,000

    33

    B-74

    131

    Soft-Annealed

     36,000

    60,000

    35

    B-68

    116

    As-Drawn

     72,000

    87,000

    10

    B-89

    179

    CD-StressRelief Annealed

     65,000

    82,000

    15

    B-86

    167

    Outside and inside diameter  tolerances for round cold-worked seamless tubing per astm a519



    Outside

    Diameter

    Size Range
    in

    ThermalTreatment after Final Cold Work Producing Size

    Wall
    Thickness
     
    as 
    Percent 
    of OD

    None, or notexceeding
    1100°F. Nominal
    Temperature

    Heated Above1100°F. Nominal
    Temperature Without
    Accelerated Cooling

    OD, in

    ID, in

    OD, in

    ID, in

    Over

    Under

    Over

    Under

    Over

    Under

    Over

    Under

    Up to 0.499

    All

    0.004

    0.000

    0.005

    0.002

    0.500-1.699

    All

    0.005

    0.000

    0.000

    0.005

    0.007

    0.002

    0.002

    0.007

    1.700-2.099

    All

    0.006

    0.000

    0.000

    0.006

    0.006

    0.005

    0.005

    0.006

    2.100-2.499

    All

    0.007

    0.000

    0.000

    0.007

    0.008

    0.005

    0.005

    0.008

    2.500-2.899

    All

    0.008

    0.000

    0.000

    0.008

    0.009

    0.005

    0.005

    0.009

    2.900-3.299

    All

    0.009

    0.000

    0.000

    0.009

    0.011

    0.005

    0.005

    0.011

    3.300-3.699

    All

    0.010

    0.000

    0.000

    0.010

    0.013

    0.005

    0.005

    0.013

    3.700-4.099

    All

    0.011

    0.000

    0.000

    0.011

    0.013

    0.007

    0.010

    0.010

    4.100-4.499

    All

    0.012

    0.000

    0.000

    0.012

    0.014

    0.007

    0.011

    0.011

    4.500-4.899

    All

    0.013

    0.000

    0.000

    0.013

    0.016

    0.007

    0.012

    0.012

    4.900-5.299

    All

    0.014

    0.000

    0.000

    0.014

    0.018

    0.007

    0.013

    0.013

    5.300-5.549

    All

    0.015

    0.000

    0.000

    0.015

    0.020

    0.007

    0.014

    0.014

    5.500-5.999

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.010

    0.010

    0.010

    0.010

    0.018

    0.018

    0.018

    0.018

    0.009

    0.009

    0.009

    0.009

    0.016

    0.016

    0.016

    0.016

    0.018

    0.000

    0.009

    0.009

    0.017

    0.015

    0.016

    0.016

    6.000-6.499

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.013

    0.013

    0.013

    0.013

    0.023

    0.023

    0.023

    0.023

    0.010

    0.010

    0.010

    0.010

    0.018

    0.018

    0.018

    0.018

    0.020

    0.000

    0.010

    0.010

    0.020

    0.015

    0.018

    0.018

    6.500-6.999

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.015

    0.015

    0.015

    0.015

    0.027

    0.027

    0.027

    0.027

    0.012

    0.012

    0.012

    0.012

    0.021

    0.021

    0.021

    0.021

    0.023

    0.000

    0.012

    0.012

    0.026

    0.015

    0.021

    0.021

    7.000-7.499

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.018

    0.018

    0.018

    0.018

    0.032

    0.032

    0.032

    0.032

    0.013

    0.013

    0.013

    0.013

    0.023

    0.023

    0.023

    0.023

    0.026

    0.000

    0.013

    0.013

    0.031

    0.015

    0.023

    0.023

    7.500-7.999

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.020

    0.020

    0.020

    0.020

    0.035

    0.035

    0.035

    0.035

    0.015

    0.015

    0.015

    0.015

    0.026

    0.026

    0.026

    0.026

    0.029

    0.000

    0.015

    0.015

    0.036

    0.015

    0.026

    0.026

    8.000-8.499

    Under 6
    6 to 7-1/2
    over 7 1¼2

    0.023

    0.023

    0.023

    0.023

    0.041

    0.041

    0.041

    0.041

    0.016

    0.016

    0.016

    0.016

    0.028

    0.028

    0.028

    0.028

    0.031

    0.000

    0.015

    0.016

    0.033

    0.022

    0.028

    0.028

    8.500-8.999

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.025

    0.025

    0.025

    0.025

    0.044

    0.044

    0.044

    0.044

    0.017

    0.017

    0.017

    0.017

    0.030

    0.030

    0.030

    0.030

    0.034

    0.0000

    0.015

    0.019

    0.038

    0.022

    0.030

    0.030

    9.000-9.499

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.028

    0.028

    0.028

    0.028

    0.045

    0.045

    0.045

    0.045

    0.019

    0.019

    0.019

    0.019

    0.033

    0.033

    0.033

    0.033

    0.037

    0.000

    0.015

    0.022

    0.043

    0.022

    0.033

    0.033

    9.500-9.999

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.030

    0.030

    0.030

    0.030

    0.045

    0.045

    0.053

    0.053

    0.020

    0.020

    0.020

    0.020

    0.035

    0.035

    0.035

    0.035

    0.040

    0.000

    0.015

    0.025

    0.048

    0.022

    0.035

    0.035

    10.000-10.999

    Under 6
    6 to 7-1/2
    over 7-1/2

    0.034

    0.034

    0.034

    0.034

    0.045

    0.045

    0.060

    0.060

    0.022

    0.022

    0.022

    0.022

    0.039

    0.039

    0.039

    0.039

    0.044

    0.000

    0.015

    0.029

    0.055

    0.022

    0.039

    0.039

    11.000-12.000

    Under 6
    6 to 7- 1/2
    over 7-1/2

    0.035

    0.035

    0.035

    0.035

    0.050

    0.050

    0.065

    0.065

    0.025

    0.025

    0.025

    0.025

    0.045

    0.045

    0.045

    0.045

    0.045

    0.0000

    0.015

    0.035

    0.060

    0.022

    0.045

    0.045


    Wall thickness tolerances for rounda,b,c
    cold-worked seamless tubing per astm a519

    Cold DrawnMaximum % Over 
     and Under Nominal

    Wall Thickness
     % of OD

    ID Up To
     1.499 Inches

    ID 1.500Inches
     and Over

    10

    7.5

    25 and Under

    12.5

    10

    Over 2


    *

    IDTolerances apply to dimensions 0.625 inch and over when ID is at least halfthe OD

    a

    Manytubes with inside diameter less than 50% of outside diameter or with wallthickness more than 25% of outside diameter, or with wall thickness over 11¼4in., or weighing more than 90 lb/ft, are difficult to draw over a mandrel.Therefore, the inside diameter can vary over or under by an amount equal to10% of the wall thickness. See also Footnote B.

    b

    Forthose tubes with inside diameter less than 1/2 in. (or less than 5/8 in. whenthe wall thickness is more than 20% of the outside diameter), which are notcommonly drawn over a mandrel. Footnote A is not applicable. Therefore, forthose tubes, the inside diameter is goverened by the outside diametertolerance shown in thiis table and the wall thicnkess tolerances shown inTable 9.

    c

    Tubinghaving a wall thickness less than 3% of the outside diameter cannot bestraightened properly without a certain amount of distortion. Consequentlysuch tubes, while having an average outside diameter and inside diameterwithin the tolerances shown in this table, require an ovality tolerance of1/2% over and under nominal outside diameter, this being in addition to thetolerances indicated in this table.


    Ovality of normal size will bewithin od tolerances

    Forseamless tubes with inside diameter less than 1/2 inch (or less than 5/8 inchwhen the wall thickness is more than 20 percent of the outside diameter),which cannot be successfully drawn over a mandrel, the wall thickness mayvary 15 percent over or under that specified, and the inside diameter will begoverned by the outside diameter and wall thickness variations.

    NOTE — Tubing having a wall thickness less than 3 percent of the outside diametercannot be straightened properly without a certain amount of distortion.Consequently, such tubes, while having an average outside diameter and insidediameter within the tolerances shown in the preceding table, require anovality tolerance of 1/2 percent over and under nominal outside diameter,this being in addition to the tolerances indicated in the preceding table.


    Variations from straightness

    Size Limits

    Maximum
     
    Curvature
    In Any
    3 Feet

    MaximumCurvature In
    Total Lengths

    Maximum
     
    Curvature 
    For
     
    Lengths 
    Under
    3 Feet

    OD 5″ and smaller, wall 
     thickness, over 3% of OD 
     but not over 0.5″

    0.030

    0.30 x (Number of feet/of length 3)

    Ratio of
     0.010″
     per foot

    OD over 5″ to 8″ incl. Wall
     thickness, over 4% of OD 
     but not over 0.75″

    0.045

    0.045 (Number of feet/of length 3)

    Ratio of
     0.015″
     per foot

    OD over 8″ to 12″ incl. Wall
     thickness, over 4% of OD 
     but not over 1″

    0.060

    0.060″ (Number of feet/of length 3)

    Ratio of
     0.010″
     per foot


    Camber, or out-of-straightness, tolerances generally do not exceed  the amounts shown for lengths of 22 feet and under. The camber is measured for  any three feet of length with a three foot straightedge and the use of a feeler  gage. The total camber — maximum curvature in the total length of the tube — is determined by rolling the tube on a surface plate and measuring the concavity  with a feeler gage.

    When the machined length of a tube extends more than three  inches from the chuck or other holding mechanism, the possibility that the tube  may be cambered must be taken into consideration. Allowance for camber must be  made for any machined length proportional to the tolerances shown.

    Tubes with lighter or heavier walls than shown, and soft  annealed or hardened tubes, present more than normal straightening  difficulties, and the camber tolerance requirements of such tubes usually are mutually agreed upon by the purchaser and the producer.


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