Hard Drawn Steel Wire, Piano Wires

    

 

            [1] Manufacturing Process     [2] Superiority of Bukwang Products     [3] The Character of Product Quality

               [4] The Usage of Wire              [5] The Test and Inspection

 

 

         Manufacturing Process

           

ROD

 

Pickling & Coating 

 

 

 

Drawing

In-line Patenting

 

 

 

 

Drawing

Product Inspection

 

 

 

In-line Patenting

Shipment

        

          Superiority of Bukwang Products

Only using selected quality rod for hard drawn steel wire and piano wire, Bukwang products 

have an excellence in wire casting, and even tensile strength, and tensility. 

It is being used for various applications as like frames of multipurpose, rolling, coiled springs, torsion springs, and twist springs.

1 Products are extremely uniform in its quality and also have a superb tensility as well as excellent manageability in its treatment

    as they are being produced with the latest equipments and facilities under the strict quality control of our most qualified engineers.

2 So they are most superior in their straight as well as in the wire casting.  No jump-ups, no bendings, no waves.

3 Bukwang hard drawn steel wire and piano wire can be satisfied with the following international specifications.

  The Character of Product Quality ( Hard Drawn Steel Wire, High-Tensile Steel Wire and Piano Wire )

   [1] Tensile strength per diameter   [2] Tolerance of diameter and ovality   [4] Inner Dia. of Coil Per Diameter of Wire, Weight Per Coil

   [3] Twist frequency, conditions of section and twist    <A> Steel wire & high tensile steel wire    <B> Piano wire

  

  

   1. Tensile strength per diameter(Unit : kgf/mm2)

Diameter

    Steel

      Wire

High-Tensile

Piano

 Wire

(mm)

Class A

Class B

Class C

Steel Wire  

Class A

Class B

0.32 

175~205

205~235

235~265

265~290

245~270

270~295

0.35 

"

"

"

"

"

"

0.40 

170~200

200~230

230~260

260~285

240~265

265~290

0.45 

165~195

195~225

225~255

255~280

235~260

260~285

0.50 

"

"

"

"

"

"

0.55 

160~190

190~220

220~250

250~275

230~255

255~280

0.60 

160~185

185~215

215~245

245~270

225~250

250~275

0.65 

"

"

"

240~265

"

"

0.70 

155~180

180~210

210~240

"

220~245

245~270

0.80 

"

180~205

205~235

235~260

215~240

240~265

0.90 

"

"

205~230

230~255

215~235

235~255

1.00 

150~175

175~200

200~225

225~245

210~230

230~250

1.20 

145~170

170~195

195~220

220~240

205~225

225~245

1.40 

140~165

165~190

190~215

215~235

200~220

220~240

1.60 

135~160

160~185

185~210

210~230

195~215

215~235

1.80 

130~155

155~180

180~205

205~225

190~210

210~230

2.00 

130~150

150~175

175~200

200~220

185~205

205~225

2.30 

125~145

145~170

170~195

195~215

180~200

200~220

2.60 

"

"

"

190~210

"

"

2.70 

120~140

140~165

165~190

"

175~195

195~215

2.90 

"

"

"

185~205

"

"

3.20 

"

140~160

160~185

"

170~190

190~210

3.50 

"

"

160~180

180~200

170~185

185~200

4.00 

"

"

"

175~195

"

"

4.50 

115~135

135~155

155~175

"

165~180

180~195

5.00 

"

"

"

170~190

"

"

5.50 

110~130

130~150

150~170

165~180

160~175

175~190

6.00 

105~125

125~145

145~165

160~175

155~170

170~185

6.50 

"

"

"

155~170

"

"

7.00 

100~120

120~140

140~160

150~165

150~165

165~180

8.00 

"

"

"

155~170

"

9.00 

95~115

115~135

135~155

150~165

145~160

10.0 

"

"

"

145~160

"

11.0 

110~130

130~150

12.0 

"

"

13.0 

105~125

125~145

   

  2. Tolerance of diameter and ovality

Tolerance

Ovality

Diameter

Steel Wire, High-Tensile Steel Wire

Piano Wire

Steel Wire, High-Tensile Steel Wire

Piano Wire

JIS

Our  Company

JIS

Our Company

JIS

Our  Company

JIS

Our Company

0.32 ~ 0.50

0.015

0.015

0.008

0.008

Not Stated

0.015

0.008

0.008

0.50 ~ 1.00

0.020

"

0.010

"

"

0.015

0.010

0.008

1.00 ~ 2.00

0.030

0.020

0.015

0.015

"

0.020

0.015

0.015

2.00 ~ 2.30

0.040

"

0.020

"

"

0.020

0.020

0.015

2.30 ~ 3.20

"

0.030

"

"

"

0.030

0.020

0.015

3.20 ~ 3.70

0.050

"

0.030

0.020

Not Stated

0.030

0.030

0.020

3.70 ~ 4.50

"

0.040

"

"

"

0.040

0.030

0.020

4.50 ~ 5.50

"

0.050

"

"

"

0.050

0.030

0.020

5.50 ~ 8.50

0.060

"

0.040

0.030

"

0.050

0.040

0.030

8.50 ~ 9.00

"

"

0.050

0.040

"

0.050

0.050

0.040

 9.00 ~      

"

"

"

"

Not Stated

0.050

0.050

0.040

   

  3. Twist frequency, conditions of section and twist

    A.  Steel wire & high tensile steel wire

                                        J I S

  Our company

  Diameter up to 2.00mm : 20 times or more

  22 times or more

    Twist frequency 

  From 2.00mm to 3.50mm : 15 times or more

  17 times or more

  From 3.50mm to 6.00mm : 10 times or more

  12 times or more

 Condition of section

  The first broken section should be at right angled with wire axis.

     Same as JIS

  No cracks, no severe grooves should be found.

  Condition of twist

  No vertical cracks, no grooves, and no partial twist of severity

     Same as JIS

  should be found.

   

   B.  Piano wire 

                                        J I S

   Our company

  DIA 0.70mm - 2.00mm  :  above 25 times

    Above 25 times

      Twist frequency

        2.00mm - 3.20mm  :  above 20 times

    Above 22 times

        3.50mm - 6.00mm  :  above 15 times

    Above 17 times

  Condition of section

  The first broken section should be at right angled with wire axis.

     Same as JIS

  No cracks, no severe grooves should be found.

    Condition of twist

  Total length should be equally twisted. Scratches and partial 

     Same as JIS

  twists should not be found.  Also, it shouldn't be a spiral type.

  4. Inner Dia. of Coil Per Diameter of  Wire, Weight Per Coil

          Diameter(mm)

       Coil Inner Dia.(mm)

       Weight Per Coil(kg)

                0.32 - 0.54

               130 - 140

                     30

                0.55 - 0.99

               180 - 200 

                     50

            1.00 - 1.49

               280 - 300

                    100

                1.50 - 1.99

               380 - 410

                    100

                2.00 - 2.89

               480 - 510

                    100

                2.90 - 6.99

               630 - 660

                100 - 250

                7.00 - 12.2

               630 - 660

                150 - 250

    The Usage of Wire

     It is used for springs ( Pull, Push, Bed & Etc ), Bolts, Nuts, Washers, And Etc.

    The Test and Inspection

    From the beginning of wire rod warehousing to the final shipping of the products,

    all of the required tests and inspections are being effected to make sure quality products.

   And it is guaranteed to meet the various needs of our customers.


 Prestressed Concrete Wire & Strand

   

       [1] Products     [2] Available Specifications & Characteristics     [3] Applications     [4] Standard Packing

  

   Products

Construction

Diameter (mm)

Shape

Plain Round Wire

2.9 ~ 9.0

2-PLY Wire

2.9

3-PLY Wire

2.9

7-PLY Wire

6.2 ~15.7

 

   Available Specifications & Characteristics

 (1) All international specifications available ;

      KS D7002          Uncoated stress-relieved steel wire and strands for prestressed concrete.

         JIS G3536           Uncoated stress-relieved steel wire and strands for prestressed concrete.

         ASTM A-416    Steel strand, uncoated 7-wire for prestressed concrete.

         BS-5896             High tensile steel wire & strand for the prestressing of concrete.

  (2) Up-date facilities guarantee the quality even and life of concrete longer.

 (3) Due to the good mechanical properties, the quantity of PC is less required.

 (4) Having a merit of better adhesion to concrete, higher yielding point and lower

     value of relaxation, the materials are to be used for multi-purposes.

 (5) Both low relaxation and normal relaxation are available.

   Applications

  Pile   Concrete Pavement
  Humn Pipe   Oil Tank
  Sleeper    Pole
  Column   Plate Slab
  Bridge-Beam   Sheet Pile
  Gas Tank   Building-Beam
  Anchor for Cable Suspension   Water Tank
  Anchor for Rock Suspension   Atomic Power Station

 

  Standard Packing

  

Construction

Packing Style

Nominal DIA(mm)

Inner DIA (mm)

    Packing    WT(kg)

    Length    (m)

5

1480

500

3,244

Plain Round Wire

Coil

6

2,252

7

1,655

8

1,267

3-PLY Wire

Coil

2.9

1480

450

2,885

6.2

10,989

7.9

6,825

9.3

4,938

9.5

4,629

7-Wire Strand

Reeless

10.8

800

2000

3,663

11.1

3,448

12.4

2,743

12.7

2,583

15.2

1,816

 In case of 7-wire strand, max 3,000kgs/reeless is available upon request.