go home
COMPANY PRODUCTS PROJECT SERVICES EQUIPMENT CONTACT US
Brass
Copper
Stainless Steel
Carbon Steel
Hot Rolled
Cold Rolled
Bright Finished
HI-CARBON
GI
GA
AL-COT
Super Galum
AFP GI
TP, TFS
ERW pipe
SAW Pipe
Steel Pipe Sheet Piles
Steel Pipe Piles
H Beam
CHQ
CD Bar
Aluminum
Specialty Metals
Gilsonite
Cold Drawn Bar
PRODUCT INTRODUCTION
The Cold Drawn Steel Bar (CD Bar) is a hot-rolled wire rod that has undergone the cold drawing process, and is sheared to a regular length, with perfect straightness as one of its features.
Compared to the hot rolled drawn steel bars, drawn steel bars feature superb surface roughness, dimensional precision, and straightness. They are used in the production of automotive parts and home electrical appliances. Dongbu Steel offers long bars and CTL (cut to length) products that are sheared to a specified length.
Applications
  1. Automotive
    * Axle shaft (C/V Joint Shaft)
    * Shock absorber shaft
    * Steering column shaft
  2. Industrial machines and home electrical appliances
    * Air-conditioner compressor shaft
    * Ball bearing, bearing race
    * Motor shaft etc
    * Printer and copier shaft
Applications by steel type
Classification AISI(SAE) AISI(SAE) JIS Application Production process symbol
Carbon steel 1010 ~ 1060 CH6A~CH45K, S25C, S35C, S45C, S50C Motor shaft, Axle shaft, S/A shaft, Steering parts CD, RCD, SCD, SWSCD
Manganese steel 1541 SMn443 C/V Joint shaft SCD
Chromium steel 5115, 5120 SCr415, SCr420 Other shaft and parts LCD, SCD
Chromium-molybdenum steel 4115, 4135, 4140 SCM415, SCM435, SCM440 Other shaft and parts LCD, SCD
High carbon chromium steel 52100 SUJ2 Bearing Shaft, Wrench set SCD, SWSCD
Free cutting steel 1213, 12L14, 1151 SUM22, SUM43, SUM24L Office automation shaft, Sleeve shaft, Home electircal appliances, control device CD CD
PRODUCTION FACILITIES
Combiner
Equipment Name Size Equipment producer
CDM 0B 3mm ~ 8mm Schumag/Germany
CDM 1A 6mm ~ 16mm Schumag/Germany
CDM 1B 7mm ~ 16mm Schumag/Germany
CMD 1C 7mm ~ 16mm EJP/Germany
CDM 2A 9mm ~ 25mm Schumag/Germany
CDM 2B 12mm ~ 30mm Schumag/Germany
CDM 3B 20mm ~ 41mm Schumag/Germany
Post-treatment facility
Equipment Name Size Equipment producer
Circular Saw Dia.:10~30mm, Length:100~800mm Tsune/Japan
Band Saw Dia.:20~30mm, Length:500~1,500mm Wongong/Korea
Bar Chamfering M/C 6~40mm, Length : 2~6m Mazda/Japan
Off line 2Roll Straightener 9mm ~ 25mm Schumag/Germany
E.C.T 12mm ~ 30mm Dr.Forst/Germany
PRODUCTION PROCESS
Continuous Drawing
The cold drawing machine produces bar-shaped products that meet the customers' needs in terms of size, straightness and mechanical properties of the product.
The cold drawing machine is chief in the process of 'Mechanical Descaler- Drawing - Cutting - Straightening & Polishing'
SIZE AVAILABILITY
Continuous Drawing
Sectional Configuration Size Length
Round 2 ~ 40mm 3 ~ 6m
Hexagonal 5 ~ 34mm 3 ~ 6m
Square 8 ~ 26mm 3 ~ 6m
Irregular Shape Order Accepted on Consulation 3 ~ 6m
Classification by size tolerance
Grade of tolerance Diameter Grade8 (h8) Grade9 (h9) Grade10
(h10)
Grade11
(h11)
~ 3 incl. 0, -0.014 0, -0.025 0, -0.040 0, -0.060
3 ~ 6 incl. 0, -0.018 0, -0.030 0, -0.048 0, -0.075
6 ~ 10 incl. 0, -0.022 0, -0.036 0, -0.058 0, -0.090
10 ~ 18 incl. 0, -0.027 0, -0.042 0, -0.070 0, -0.110
18 ~ 30 incl. 0, -0.033 0, -0.052 0, -0.084 0, -0.113
30 ~ 50 incl. 0, -0.039 0, -0.062 0, -0.100 0, -0.160
CTL bar
A CTL Bar is cut from a CD Bar to the length required by the customer. It has an elegant surface and accuracy in length. Product testing ensures that the product is flawless.
  Item Charge Quantity Capacity (T/year)
Product Carbon Steel, Alloy Steel, Free Cuting Steel, Special Steel Dia - Min 10.0mm¢ Max 30.0mm¢
Quality Surface Defect free
Dia.
Dia. Grade
Grade8 (h8) Grade9 (h9) Grade10 (h10)
Over 6 to 10 incl. 0, -0.022 0, -0.036 0, -0.058
Over 10 to 18 incl. 0, -0.027 0, -0.043 0, -0.070
Over 18 to 30 incl. 0, -0.033 0, -0.052 0, -0.084
Length Tolerance : within ± 0.2mm
Packing - Steel box
STEEL TYPE QUALITY FEATURES
Classification by chemical components
Symbol Chemical Composition (%) JIS
Kinds of Steel SAE No C Si Mn P S Ni Cr Mo Pb
Carbon Steel 1010 0.08 ~ 0.13 0.15 ~ 0.35 0.30 ~ 0.60 0.030 max. 0.035 max. - - - - S10C
1015 0.13 ~ 0.18 0.15 ~ 0.35 0.30 ~ 0.60 0.030 max. 0.035 max. - - - - S15C
1018 0.15 ~ 0.20 0.15 ~ 0.35 0.30 ~ 0.60 0.030 max. 0.035 max. - - - - S18C
1020 0.18 ~ 0.23 0.15 ~ 0.35 0.30 ~ 0.60 0.030 max. 0.035 max. - - - - S20C
1022 0.20 ~ 0.25 0.15 ~ 0.35 0.30 ~ 0.60 0.030 max. 0.035 max. - - - - S22C
1025 0.22 ~ 0.28 0.15 ~ 0.35 0.30 ~ 0.60 0.030 max. 0.035 max. - - - - S25C
1035 0.32 ~ 0.38 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. 0.035 max. - - - - S35C
1038 0.35 ~ 0.41 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. 0.035 max. - - - - S38C
1040 0.37 ~ 0.43 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. 0.035 max. - - - - S40C
1045 0.42 ~ 0.48 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. 0.035 max. - - - - S45C
1049 0.45 ~ 0.51 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. 0.035 max. - - - - S48C
1050 0.48 ~ 0.53 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. 0.035 max. - - - - S50C
1055 0.52 ~ 0.58 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. 0.035 max. - - - - S55C
1060 0.55 ~ 0.65 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. 0.035 max. - - - - S58C
Free cutting steel 1117 0.14 ~ 0.20 0.15 ~ 0.35 1.00 ~ 1.30 0.040 max. - - - - - SUM31
1144 0.40 ~ 0.48 0.15 ~ 0.35 1.35 ~ 1.65 0.040 max. - - - - - SUM43
1213 0.13 max. 0.15 ~ 0.35 0.70 ~ 1.00 0.07 ~ 0.12 - - - - - SUM22
12L14 0.15 max. 0.15 ~ 0.35 0.85 ~ 1.15 0.04 ~ 0.09 - - - - 0.10 ~ 0.35 SUM24L
- 0.28 ~ 0.28 0.15 ~ 0.35 0.30 ~ 0.60 0.030 max. - - - - 0.10 ~ 0.35 S25CL
- 0.42 ~ 0.48 0.15 ~ 0.35 0.60 ~ 0.90 0.030 max. - - - - 0.10 ~ 0.35 S45CL
Manganese Steel - 0.30 ~ 0.36 0.15 ~ 0.35 1.20 ~ 1.50 0.030 max. 0.030 max. - 0.35 max. - - SMn433
1541 0.40 ~ 0.46 0.15 ~ 0.35 1.35 ~ 1.65 0.030 max. 0.030 max. - 0.35 max. - - SMn443
Chromium molybdenum steel - 0.13 ~ 0.18 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 0.15 ~ 0.30 - SCM415
- 0.18 ~ 0.23 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 0.15 ~ 0.30 - SCM420
4135 0.33 ~ 0.38 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 0.15 ~ 0.30 - SCM435
4137 0.35 ~ 0.40 0.15 ~ 0.35 0.70 ~ 0.90 0.030 max. 0.030 max. - 0.90 ~ 1.20 0.15 ~ 0.30 - -
4140 0.38 ~ 0.43 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 0.15 ~ 0.30 - SCM440
Chrome Steel 5115 0.13 ~ 0.18 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 - - SCr415
5120 0.18 ~ 0.23 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 - - SCr420
5130 0.28 ~ 0.33 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 - - SCr430
5135 0.33 ~ 0.38 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 - - SCr435
5140 0.38 ~ 0.43 0.15 ~ 0.35 0.60 ~ 0.85 0.030 max. 0.030 max. - 0.90 ~ 1.20 - - SCr440
Stainless Steel - 0.15 max. 1.00 max. 2.00 max. 0.20 max. 0.15 max. 8.00 ~ 10.00 17.00 ~ 19.00 0.60 max. - SUS303
- 0.08 max. 1.00 max. 2.00 max. 0.0045 max. 0.030 max. 8.00 ~ 10.50 08.00 ~ 20.00 - - SUS304
High Carbon Bearing Steel 52100 0.95 ~ 1.10 0.15 ~ 0.35 0.50 max. 0.025 max. 0.025 max. - 1.30 ~ 1.60 - - SUJ 2
STANDARD SPECIFICATIONS
Packing and color of product tag
Type Package Tape Product Tag
Free cutting steel White Green Green
Commercial Steel White White White
Carbon Steel White Yellow Yellow
Alloy Steel White Blue Blue
HOW
TO
ORDER