Cold Drawn Steel Bars



  • KKS can supply cold drawn bars in carbon steel specifications: SS400, S10C, S15C, S20C, S35C and S45C. and in sizes according to the table below. Sizes not shown in the table is also available according to customer's request. We are also able to supply alloy specifications according to customer's request.


    Shape Size Range Tolerance
    Coil to Bar Bar to Bar
    Round3/16" - 1"up to 6"h 10
    Hexagonn/a5/16" - 2 1/2"h 11
    Profilesn/apre request


    Chemical Composition For Cold Drawn Steel Bars
    Symbol Chemical Composition (%)
    JIS SAE C Si Mn P S
    S10C 1010 0.08-0.13 0.15-0.35 0.30-0.60 0.030 max 0.035 max
    S15C 1015 0.13-0.18 0.15-0.35 0.30-0.60 0.030 max 0.035 max
    S20C 1020 0.18-0.23 0.15-0.35 0.30-0.60 0.030 max 0.035 max
    S35C 1035 0.32-0.38 0.15-0.35 0.30-0.60 0.030 max 0.035 max
    S45C 1045 0.42-0.48 0.15-0.35 0.30-0.60 0.030 max 0.035 max
    SCM420 0.18-0.23 0.15-0.35 0.60-0.85 0.030 max 0.030 max
  • Advantage

    Compared with ordinary hot rolled steel bars, cold drawn bars can offer several advantages to the users as follow:


    1. Greater dimensional accuracy
    2. Enhanced mechanical properties
    3. Improved surface condition and straightness
    4. More consistent machinability
  • Applications


    Currently Kriangkrai Steel Center supplies 70% of its cold drawn bar to many leading traders in Bangkok and the metropolitan area.

    The other 30% goes directly to the end users from various industries such as automotive, electrical appliances, agricultures etc.

    Common Applications for Cold Drawn Steel Bars
    • Electric Motor Shafts
    • Fasteners
    • Forging Applications
    • Precision Machined Parts
    • Printer Shafts
    • Roller Conveyor Axles
    • Stabilizer Bars
    • Vehicle Axles

  • Production Process


    KKS' production facility covers up to 16000 square meters. The production lines consist of coil-to-bar and bar to bar which produce round, hexagon, squares and special sections in carbon and alloy steel specifications. All steel bars are produced using advanced and efficient production line equipment.


    Coil-to-bar lines

    KKS' s coil-to-bar lines consist of four Schumag Combined Drawing Machines producing cold drawn bar ranging from 3/16" to 1" in diameter. The production begins with feeding the raw material which is wire rod or bar-in-coil into the descaling machine to remove rust and scale from steel bar surface. Then the steel is pushed and cold drawn through the die continuously to precise diameter and tolerance. The cold drawn bar is then cut to lengthof 3.5 to 6.5 meters and straightened by nozzle straighteners. Grinding service is also available in case the customers demands for closer dimensional tolerance or better surface finish.





    Bar-to-bar lines

    KKS' bar-to-bar lines consist of four descaling machines, six single chain draw benches and six two rolls straightening machines. With these machines, we can produce cold drawn bar up to 6" in diameter. Similar to coil-to-bar lines, the production begins with descaling, cold drawing, cutting and straightening.


    All the cold drawn bars produced at KKS are securely bundled, weighed, labeled and stored in our well managed warehouse ready for prompt delivery to customers.

  • Diameter tolerance table


    Round Bar
    Size Tolerance h 10 Weight per 1 m.
    Inch mm min max
    *1/8" 3.17 3.13 3.20 0.062
    3/16" 4.76 4.72 4.76 0.140
    1/4" 6.35 6.30 6.35 0.249
    5/16" 7.93 7.88 7.93 0.388
    3/8" 9.52 9.47 9.52 0.559
    7/16" 11.11 11.04 11.11 0.761
    1/2" 12.70 12.63 12.70 0.995
    9/16" 14.28 14.21 14.28 1.26
    5/8" 15.87 15.80 15.85 1.55
    11/16" 17.46 17.39 17.46 1.88
    3/4" 19.05 18.97 19.03 2.24
    13/16" 20.63 20.55 20.63 2.63
    7/8" 22.22 22.14 22.20 3.05
    15/16" 23.81 23.73 23.81 3.50
    1" 25.40 25.32 25.37 3.98
    1 1/8" 28.57 28.49 28.57 5.03
    1 1/4" 31.75 31.65 31.72 6.22
    1 3/8" 34.92 34.82 34.92 7.52
    1 1/2" 38.10 38.00 38.07 8.95
    1 5/8" 41.27 41.17 41.27 10.51
    1 3/4" 44.45 44.35 44.42 12.19
    1 7/8" 47.62 47.52 47.62 13.99
    2" 50.80 50.68 50.77 15.92
    2 1/8" 53.97 53.85 53.97 17.97
    2 1/4" 57.15 57.03 57.12 20.14
    2 1/2" 63.50 63.38 63.47 24.87
    2 5/8" 66.67 66.55 66.67 27.42
    2 3/4" 69.85 69.73 69.85 30.09
    *2 7/8" 73.02 72.90 73.13 32.89
    3" 76.20 76.08 76.17 35.81
    3 1/4" 82.55 82.41 82.55 42.03
    3 1/2" 88.90 88.76 88.90 48.75
    4" 101.60 101.46 101.60 63.67
    4 1/4" 107.95 107.81 107.95 71.88
    *4 1/2" 114.30 114.16 114.46 80.58
    4 3/4" 120.65 120.51 120.65 89.78
    *5" 127.00 126.86 127.16 99.48
    *6" 152.40 152.26 152.45 143.25

    Round Bar
    Size Tolerance h 10 Weight per 1 m.
    mm min max
    4.00 3.96 4.00 0.099
    5.00 4.96 5.00 0.154
    6.00 5.96 6.00 0.222
    7.00 6.95 7.00 0.302
    8.00 7.95 8.00 0.395
    9.00 8.95 9.00 0.500
    10.00 9.95 10.00 0.617
    11.00 10.93 11.00 0.746
    12.00 11.93 12.00 0.888
    13.00 12.93 13.00 1.04
    14.00 13.93 14.00 1.21
    15.00 14.93 15.00 1.39
    16.00 15.93 16.00 1.58
    17.00 16.93 17.00 1.78
    18.00 17.93 18.00 2.00
    19.00 18.92 19.00 2.23
    20.00 19.93 20.00 2.47
    21.00 20.92 21.00 2.72
    22.00 21.92 22.00 2.99
    23.00 22.92 23.00 3.26
    24.00 23.92 24.00 3.55
    25.00 24.92 25.00 3.85
    26.00 25.92 26.00 4.17
    27.00 26.92 27.00 4.50
    28.00 27.92 28.00 4.84
    29.00 28.92 29.00 5.19
    30.00 29.92 30.00 5.55
    31.00 30.90 31.00 5.93
    32.00 31.90 32.00 6.32
    33.00 32.90 33.00 6.72
    34.00 33.90 34.00 7.13
    35.00 34.90 35.00 7.56
    36.00 35.90 36.00 7.99
    37.00 36.90 37.00 8.44
    38.00 37.90 38.00 8.91
    39.00 38.90 39.00 9.38
    40.00 39.90 40.00 9.87
    41.00 40.90 41.00 10.37
    42.00 41.90 42.00 10.88
    43.00 42.90 43.00 11.40
    44.00 43.90 44.00 11.94
    45.00 44.90 45.00 12.49
    46.00 45.90 46.00 13.05
    48.00 47.90 48.00 14.21
    50.00 49.90 50.00 15.42
    55.00 54.88 55.00 18.66
    56.00 55.88 56.00 19.34
    60.00 59.88 60.00 22.20

    Remark:
    1. This table is based on TIS 864-2532
    2. *refers to customer's usage and applications.
    Hexagonal Bar
    Size Tolerance h 11 Weight per 1 m.
    Inch mm min max
    5/16" 7.93 7.84 7.93 0.425
    3/8" 9.52 9.43 9.52 0.612
    10.00 9.91 10.00 0.676
    7/16" 11.11 11.00 11.11 0.834
    12.00 11.89 12.00 0.973
    1/2" 12.70 12.59 12.70 1.09
    *14.00 13.85 14.00 1.32
    9/16" 14.28 14.17 14.28 1.38
    *5/8" 15.87 15.75 15.87 1.70
    17.00 16.89 17.00 1.95
    11/16" 17.46 17.35 17.46 2.06
    19.00 18.87 19.00 2.44
    3/4" 19.05 18.92 19.05 2.45
    13/16" 20.63 20.50 20.63 2.87
    21.00 20.87 21.00 2.98
    22.00 21.87 22.00 3.27
    7/8" 22.22 22.09 22.22 3.34
    23.00 22.87 23.00 3.57
    15/16" 23.81 23.68 23.81 3.83
    1" 25.40 25.27 25.40 4.36
    26.00 25.87 26.00 4.57
    27.00 26.87 27.00 4.92
    1 1/8" 28.57 28.44 28.57 5.51
    29.00 28.87 29.00 5.68
    30.00 29.87 30.00 6.08
    1 1/4" 31.75 31.59 31.75 6.81
    1 3/8" 34.92 34.76 34.92 8.24
    36.00 35.84 36.00 8.75
    1 1/2" 38.10 37.94 38.10 9.81
    *41.00 40.70 41.00 11.36
    1 5/8" 41.27 41.11 41.27 11.51
    1 3/4" 44.45 44.29 44.45 13.35
    1 7/8" 47.62 47.46 47.62 15.32
    2" 50.80 50.61 50.80 17.43
    2 1/8" 53.97 53.78 53.97 19.68
    2 1/4" 57.15 56.96 57.15 22.06
    2 3/8" 60.32 60.13 60.32 24.58
    2 1/2" 63.50 63.31 63.50 27.24