The POSCO Quality

Wire Rod

Wire rods are available in the form of coils. The cross-section of the rod ranges from 5.5 to 1.6 mm. Billets produced from a continuous casting system are rolled, cooled and coiled into the sizes required by the customers.

Product Specification

This product specification is subject to change, so please check the latest specifications when ordering or consult with the person in charge.

Mild Steel Wire Rods

규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu
POSFIS5M1 ~0.02 ~0.07 0.10~0.40 ~0.030 ~0.030 -
POSFIS6M1 ~0.04 ~0.07 0.20~0.50 ~0.040 ~0.040 -
POSFIS6B ~0.05 ~0.07 ~0.60 ~0.040 ~0.040 -

Piano Wire rods for Micro Cables

규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu Cr
POSMICR062 0.58~0.66 0.10~0.30 0.30~0.70 ~0.020 ~0.020 ~0.020 ~0.020

Wire rods for Bridge Cables

규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu Cr
POSCABLE82 0.79~0.86 0.70~1.10 0.60~0.90 ~0.020 ~0.020 ~0.020 ~0.10
POSCABLE86 0.82~0.89 0.70~1.10 0.60~0.90 ~0.020 ~0.020 ~0.020 ~0.10
POSCABLE90 0.87~0.94 1.00~1.40 0.30~0.60 ~0.020 ~0.020 ~0.020 0.15~0.45
POSCABLE92 0.89~0.96 1.10~1.50 0.30~0.60 ~0.020 ~0.020 ~0.030 0.15~0.45

Wire rods for Tire Cord

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cr
Class1 POSCORD70S 0.65~0.75 0.15~0.30 0.30~0.60 ~0.030 ~0.030 -
Class2 POSCORD80S 0.75~0.88 0.15~0.30 0.30~0.60 ~0.030 ~0.030 -
Class3 POSCORD90 0.90~0.96 0.15~0.30 0.30~0.60 ~0.030 ~0.030 -
POSCORD92CR 0.90~0.96 0.15~0.30 0.30~0.60 ~0.030 ~0.030 0.10~0.30

High Tensile Steel Wire Rods

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu B Ti
Class1 PSPC22 0.20~0.25 0.10~0.40 0.70~1.00 ~0.035 ~0.030 - ~50ppm -
PSPC30B 0.27~0.32 0.15~0.35 0.60~0.90 ~0.035 ~0.030 ~0.020 5ppm~ -
PSPC32B 0.29~0.34 0.15~0.35 0.60~0.90 ~0.035 ~0.030 ~0.020 5ppm~ -
PSPC35B 0.32~0.38 0.15~0.35 0.60~0.90 ~0.035 ~0.030 ~0.020 5ppm~ -
Class2 PSPC30SI 0.27~0.32 1.60~1.90 0.60~0.90 ~0.035 ~0.030 ~0.020 - -
PSPC32SI 0.29~0.34 1.60~1.90 0.60~0.90 ~0.035 ~0.030 ~0.020 - -
PSPC35SI 0.32~0.38 1.60~1.90 0.60~0.90 ~0.035 ~0.030 ~0.020 - -
Class3 PSPC32SIB 0.29~0.36 0.50~2.00 0.55~0.95 ~0.035 ~0.030 ~0.020 5ppm~ 0.01~0.06
PSPC32SIBM 0.29~0.36 0.50~2.00 0.80~1.20 ~0.030 ~0.025 ~0.250 5ppm~ 0.01~0.05

Wire rods for Welding

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu Remark
POSWELD1A 0.15 0.40~1.00 0.85~1.60 ~0.030 ~0.030 ~0.50 -
POSWELD1B 0.40~1.00 1.00~1.60 Al : ~0.1
Ti+Zr : ~0.13
POSWELD1C 0.07 0.40~0.70 0.90~1.40 Al : ~0.15
Ni : ~0.20
V : ~0.02
POSWELD1CM 0.05~0.15 0.30~0.80 0.60~1.50 ~0.025 ~0.025 ~0.20 Cr : 1.0~1.5
Mo : 0.4~0.65
POSWELD2A 0.15 0.55~1.10 1.25~1.90 ~0.030 ~0.030 ~0.50 -
POSWELD2B 0.15 0.55~1.10 1.40~1.90 Al : ~0.10
Ti+Zr : ~0.30 Max
POSWELD2J ~0.08 0.55~1.10 1.25~1.60 -
POSWELD2S ~0.08 0.55~1.10 1.25~1.90 ~0.030 0.01~0.03 -
POSWELD2MO 0.07~0.12 0.50~0.80 1.60~2.10 ~0.025 ~0.025 ~0.050 Mo : 0.40~0.65
POSWELD3CM 0.05~0.15 0.30~0.80 0.50~0.80 ~0.025 ~0.025 ~0.020 Cr : 1.0~1.5
Mo : 0.4~0.65
POSWELD4B ~0.15 0.55~1.10 1.40~2.60 ~0.025 ~0.025 ~0.50 Al : ~0.10
Ti+Zr : ~0.30
POSWELD4D Ni : ~0.15
Cr : ~0.15
Mo : ~0.60
Ti+Zr : ~0.30
POSWELD23 ~0.13 0.15~0.45 0.80~1.30 ~0.030 ~0.030 -
POSWELD41 ~0.17 ~0.05 1.80~2.20 ~0.030 ~0.030
POSWELD50 ~0.15 ~0.05 1.80~2.20 ~0.030 ~0.030
POSWELD60 ~0.17 ~0.2 1.65~2.15 ~0.030 ~0.030 ~0.35 Mo : 0.45~0.65
POSWELD12K 0.06~0.15 0.20~0.65 1.50~2.00 ~0.025 ~0.025 ~0.35 Mo : 0.40~0.60

Spring Steel

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cr Other
POSHIS120D 0.40~0.54 1.80~2.60 0.50~1.00 ~0.025 ~0.025 0.50~1.50 V,Ni
POSHIS120S 0.46~0.60 1.20~2.00 0.50~1.00 ~0.025 ~0.025 0.50~1.00 V,Ni
POSHIS130D 0.51~0.59 1.80~2.60 0.50~1.00 ~0.025 ~0.025 0.50~1.50 V,Ni,B,Ti

Wire rods for Oil Tempered Wire

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu
POT62C 0.60~0.65 0.15~0.30 0.85~1.15 ~0.020 ~0.020 ~0.20
POT67C 0.65~0.70 0.15~0.30 0.85~1.15 ~0.020 ~0.020 ~0.20
POT70C 0.66~0.71 0.15~0.30 0.80~1.10 ~0.020 ~0.020 ~0.15

Free-Cutting Steel

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu
POSCUT1A ~0.13 - 1.0~1.50 0.06~0.12 0.24~0.40 0.04~0.30
POSCUT1S ~0.09 ~0.15 0.75~2.0 0.04~0.09 0.26~0.60 -
PSW10 0.08~0.13 ~0.15 0.60~0.90 0.06~0.10 ~0.035 -

Carbon Steel for Cold Heading & Forging

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S S-Al
POSCH6ASP ~0.08 ~0.07 0.25~0.45 ~0.030 ~0.030 0.02~

Soft Magnetic Iron Bars

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S
JIS-SUYB1 ~0.01 ~0.05 0.20~0.30 ~0.020 ~0.015

Weather Resistant Steel

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S S-Al Cu Ni Cr
POSTEN20W 0.20~0.25 0.15~0.25 0.70~0.90 ~0.030 ~0.030 0.03~0.08 0.30~0.50 0.30~0.50 0.60~0.90

Micro-Alloyed Steel

Designation에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S S-Al Ni V N(ppm)
POSMA40 0.35~0.45 0.40~0.90 0.80~1.20 ~0.025 ~0.08 0.01~0.08 - ~0.12 ~150
POSMA45R 0.43~0.47 0.20~0.40 1.10~1.50 ~0.030 ~0.060 0.01~0.07 ~0.20 ~0.11 ~120