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CD Bar

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CD Bar

Cold Drawn Bar

CD-bar is high-quality steel bar that is processed and calibrated to give precision and straightness of surface tissue and dimensions while cold-drawing annealing rolled wire to a certain dimension.

Shape Diameter(mm) Length(mm)
Round 14.0 ~ 25.0 4000 ~ 6000

Manufacture Process

Ovality of diameter and tolerance Range

Diameter(mm) 3mm ~ 6mm 6mm ~ 10mm 10mm ~ 18mm 18mm ~ 30mm
Level9 (IT9) 0 ~ -0.030 0 ~ -0.036 0 ~ - 0.043 0 ~ - 0.052

Rolled Steel for normal Structures

Hot rolled steel and used for structures such as buildings, bridges, ships, vehicles, etc.

Steel Grade Chemical Composition(%) Tensile Strength(N/mm²) Remark
KS C Si Mn P S
SS330/SS235 ≤0.25 ≤0.45 ≤1.40 ≤0.050 ≤0.050 330 ~ 450 SS400, SS275, SS490, SS315are used for welding structures
SS400/SS275 400 ~ 550
SS490/SS315 ≤0.28 ≤0.50 ≤1.50 490 ~ 630
SS540/SS410 ≤0.30 ≤0.55 ≤1.60 ≤0.040 ≤0.040 ≥540

Carbon Steel for mechanical structures

It has the advantage of the mechanical properties of carbon steel(tension strength, hardness, yield point)
and is produced for secondary processing.
Usage : Bolts, Nuts, Pins, Shaft, Steer system

Steel Grade Chemical Composition(%)
KS JIS AISI C Si Mn P S
SM10C S10C 1010 0.08 ~ 0.13
0.15 ~ 0.35
0.30 ~ 0.60
0.030
0.035
SM15C S15C 1015 0.13 ~ 0.18
SM20C S20C 1020 0.18 ~ 0.23
SM25C S25C 1025 0.22 ~ 0.28
SM30C S30C 1030 0.27 ~ 0.33
0.60 ~ 0.90
SM38C S38C 1038 0.35 ~ 0.41
SM40C S40C 1040 0.37 ~ 0.43
SM45C S45C 1045 0.42 ~ 0.48
SM50C S50C 1050 0.47 ~ 0.53
SM55C S55C 1055 0.52 ~ 0.58

Alloy Steel for mechanical structures

Alloy steel is made by hot rolling and is often used for secondary mechanical structures.
Usage : Automotive bumper, OA device, home appliances, Grille covers

Steel Grade Chemical Composition (%)
KS AISI DIN C Si Mn P S Ni Cr Mo
SCM432 - - 0.27 ~ 0.37
0.15 ~ 0.35
0.30 ~ 0.60
≤ 0.030
≤ 0.030
 ≤ 0.025
1.00 ~ 1.50 0.15 ~ 0.30
SCM430 4130 - 0.28 ~ 0.33
0.60 ~ 0.90
0.90 ~ 1.20 0.15 ~ 0.30
SCM435 4135 / 4137 34CrMo4 0.33 ~ 0.38 0.90 ~ 1.20 0.15 ~ 0.30
SCM440 4140 / 4142 42CrMo4 0.38 ~ 0.43 0.90 ~ 1.20 0.15 ~ 0.30
SCM445 4145 / 4147 - 0.43 ~ 0.48 0.90 ~ 1.20 0.15 ~ 0.30
SCM415 - 16CrMo4 0.13 ~ 0.18 0.90 ~ 1.20 0.15 ~ 0.25
SCM420 4148 50CrMo4 0.18 ~ 0.23 0.90 ~ 1.20 0.15 ~ 0.25

Stainless Steel Bar

Stainless steel bar is highly corrosion resistant, strong against external shocks,
and low heat treatment hardening for easy use in poor environments.

Type Steel Grade Ingredient(%) Usage
AISI JIS
303 series STS303 SUS303 17CR-18NI O.A Shaft(Printer, Copy), Nuts, Bolts, Brushing, Car parts
STS303C SUS303C 18Cr-8Ni
304 series STS304 SUS304 18Cr-9Ni Construction material ladder, Tableware, Car parts, Bolt, Nut
STS304L SUS304L 7Cr-8.5Ni
STS304J3 SUS304J3 3Cu
316 series
STS316 SUS316 18Cr-12Ni Medical supplies, coastal buoys, and paper industries
STS316L SUS316L 2MO
400 series
STS410 SUS410 11.5Cr Motor Shaft, Bolts, Nuts, For Annealing
STS416 SUS416 12Cr Car parts, Electronic Materials
STS4201J1 SUS4201J1
13Cr-0.3C
Bolts, Shaft, Spring, Tableware, Knife pin
STS420J2 SUS420J2
STS420F SUS420F
STS430 SUS430
18Cr-Ni(x)
Car parts, Tank electronic components, Rivets
STS430F SUS430F

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