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 42 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
POSFIS5AS 0.03 Max. 0.10 Max. 0.20 Max. 0.030 Max. 0.030 Max. -
POSFIS5M1 0.02 Max. 0.07 Max. 0.10~0.40 0.030 Max. 0.030 Max. -
POSFIS6M1 0.04 Max. 0.07 Max. 0.15~0.50 0.040 Max. 0.040 Max. -
POSFIS6B 0.05 Max. 0.07 Max. 0.60 Max. 0.040 Max. 0.040 Max. -
*POSFIS: POSCO Fine Drawing Steel

Piano Wire Rods for Micro Cables

Micro Cable용 피아노 선재 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu Cr
POSMICRO62 0.58~0.68 0.10~0.30 0.35~0.65 0.020 Max. 0.020 Max. 0.20 Max. 0.20 Max.
*POSMICRO: POSCO Micro

Wire Rods for Cables

교량 케이블용 선재 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu Cr
POSCABLE82 0.80~0.85 0.80~1.00 0.60~0.90 0.020 Max. 0.020 Max. 0.20 Max. -
POSCABLE86 0.82~0.89 0.80~1.00 0.60~0.90 0.020 Max. 0.020 Max. 0.20 Max. -
POSCABLE90 0.88~0.94 1.10~1.40 0.30~0.60 0.020 Max. 0.020 Max. 0.20 Max. 0.15~0.45
POSCABLE92 0.88~0.96 1.10~1.50 0.30~0.70 0.020 Max. 0.020 Max. 0.30 Max. 0.15~0.45
POSCABLE98 0.94~1.00 1.10~1.50 0.30~0.70 0.025 Max. 0.025 Max. 0.20 Max. 0.50~0.95
POSFLEX35 0.32~0.38 0.10~0.35 0.60~0.85 0.025 Max. 0.025 Max. 0.20 Max. -
POSFLEX62 0.60~0.65 0.12~0.32 0.60~0.90 0.025 Max. 0.025 Max. 0.20 Max. -
POSFLEX72 0.70~0.75 0.15~0.35 0.60~0.90 0.025 Max. 0.025 Max. 0.20 Max. -
POSNEPTUNE3 0.94~1.00 1.10~1.50 0.30~0.70 0.025 Max. 0.025 Max. 0.20 Max. 0.50~0.95
*POSCABLE: POSCO Wire Rod for Cable
*POSFLEX: POSCO Flexible Pipe
*POSNEPTUNE: POSCO Neptune Wire Rod

Wire Rods for Tire Cord

타이어코드용 선재 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cr
POSCORD60M 0.56~0.62 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. -
POSCORD70S 0.67~0.75 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. -
POSCORD70M 0.67~0.75 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. -
POSCORD70D 0.67~0.75 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. -
POSCORD80S 0.78~0.85 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. -
POSCORD80M 0.78~0.85 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. -
POSCORD80D 0.78~0.85 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. -
POSCORD86 0.83~0.89 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. -
POSCORD86CR 0.83~0.89 0.10~0.30 0.40~0.60 0.03 Max. 0.03 Max. 0.10~0.30
POSCORD92CR 0.88~0.95 0.10~0.30 0.20~0.40 0.03 Max. 0.03 Max. 0.10~0.30
POSCORD92SI 0.88~0.95 0.30~0.60 0.20~0.40 0.03 Max. 0.03 Max. 0.10~0.30
*POSCORD: POSCO Tire Cord Steel

High Tensile Steel Wire Rods

고장력강 선재 규격기호에 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 0.030 Max. 0.025 Max. - 50ppm Max. -
PSPC30B 0.27~0.32 0.15~0.35 0.60~0.90 0.030 Max. 0.035 Max. 0.25 Max. 5ppm Min. -
PSPC32B 0.29~0.34 0.15~0.35 0.60~0.90 0.030 Max. 0.035 Max. 0.25 Max. 5ppm Min. -
PSPC35B 0.32~0.38 0.15~0.35 0.60~0.90 0.030 Max. 0.035 Max. 0.25 Max. 5ppm Min. -
Class2 PSPC30SI 0.27~0.32 1.60~1.90 0.60~0.90 0.035 Max. 0.030 Max. 0.20 Max. - -
PSPC32SI 0.29~0.34 1.60~1.90 0.60~0.90 0.035 Max. 0.030 Max. 0.20 Max. - -
PSPC35SI 0.32~0.38 1.60~1.90 0.60~0.90 0.035 Max. 0.030 Max. 0.20 Max. - -
Class3 PSPC32SIB 0.29~0.36 0.50~2.00 0.55~0.95 0.030 Max. 0.025 Max. 0.25 Max. 5ppm Min. 0.01~0.06
PSPC32SIBM 0.29~0.36 0.50~2.00 0.80~1.20 0.030 Max. 0.025 Max. 0.25 Max. 5ppm Min. 0.01~0.05
PSPC35SIB 0.32~0.38 0.50~2.00 0.60~0.90 0.030 Max. 0.025 Max. 0.25 Max. 5ppm Min. 0.01~0.06
*PSPC: POSCO Super Wire Rod Prestressed Concrete

Wire Rods for Welding

용접봉용 선재 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cu Cr Mo Ti+Zr
POSWELD1A 0.15 Max. 0.45~0.75 0.90~1.40 0.025 Max. 0.030 Max. 0.30 Max. - - -
POSWELD1B 0.15 Max. 0.40~1.00 1.00~1.60 0.030 Max. 0.030 Max. 0.30 Max. 0.30 Max. 0.30 Max. 0.15 Max.
POSWELD1C 0.07 Max. 0.40~0.70 0.90~1.40 0.025 Max. 0.030 Max. 0.30 Max. 0.30 Max. 0.30 Max. 0.30 Max.
POSWELD1CM 0.05~0.15 0.30~0.80 0.60~1.50 0.025 Max. 0.025 Max. 0.20 Max. 1.00~1.50 0.40~0.65 -
POSWELD2A 0.06~0.15 0.80~1.15 1.40~1.85 0.025 Max. 0.030 Max. 0.30 Max. 0.30 Max. 0.30 Max. -
POSWELD2B 0.02~0.10 0.55~1.10 1.40~1.90 0.025 Max. 0.030 Max. 0.30 Max. 0.30 Max. 0.30 Max. 0.30 Max.
POSWELD2J 0.10 Max. 0.55~1.10 1.25~1.60 0.030 Max. 0.030 Max. 0.30 Max. 0.30 Max. 0.30 Max. -
POSWELD2S 0.08 Max. 0.55~1.10 1.25~1.90 0.030 Max. 0.01~0.03 0.30 Max. 0.30 Max. 0.30 Max. -
POSWELD4B 0.15 Max. 0.55~1.10 1.70~2.20 0.030 Max. 0.030 Max. 0.30 Max. 0.30 Max. 0.30 Max. 0.30 Max.
POSWELD4D 0.15 Max. 0.50~1.10 1.60~2.10 0.025 Max. 0.025 Max. 0.30 Max. 0.30 Max. 0.40 Max. 0.30 Max.
POSWELD23 0.05~0.15 0.15~0.35 0.80~1.25 0.030 Max. 0.030 Max. 0.35 Max. 0.30 Max. 0.30 Max. -
POSWELD41 0.15 Max. 0.05 Max. 1.80~2.20 0.030 Max. 0.030 Max. 0.30 Max. 0.30 Max. 0.30 Max. -
POSWELD50 0.15 Max. 0.05 Max. 1.80~2.20 0.030 Max. 0.030 Max. 0.15 Max. 0.15 Max. 0.15 Max. -
POSWELD60 0.07~0.17 0.20 Max. 1.65~2.20 0.025 Max. 0.030 Max. 0.30 Max. 0.30 Max. 0.45~0.65 -
*POSWELD: POSCO Wire Rod for Welding

Bearing Steel

스프링강 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cr Mo others
POS55CR 0.52~0.60 0.15~0.35 0.60~0.95 0.030 Max. 0.008 Max. 0.10~0.30 0.10 Max. Cu 0.30 Max.
Ni 0.20 Max.
POSWIND100 0.93~1.05 0.50~0.70 1.00~1.20 0.025 Max. 0.008 Max. 1.40~1.65 0.10 Max. Cu 0.25 Max.
Ni 0.30 Max.
*POSWIND: POSCO Bearing Steel for Wind
touch slide

Spring Steel

스프링강 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S Cr others
POSHIS110 0.56~0.64 0.50~1.00 0.50~0.70 0.025 Max. 0.025 Max. 0.20~0.60
POSHIS120L 0.46~0.60 1.20~1.70 0.50~0.80 0.025 Max. 0.025 Max. 0.50~0.80 Nb, V
POSHIS120S 0.50~0.56 1.20~1.60 0.50~0.90 0.020 Max. 0.020 Max. 0.50~0.80 Cu, Ni, Ti, V
POSHIS125 0.51~0.57 1.40~1.70 0.55~0.80 0.017 Max. 0.017 Max. 0.60~0.80 Cu, Nb, B, Ni, Ti, V
POSHIS125RC 0.46~0.54 1.30~1.70 0.30~0.60 0.017 Max. 0.017 Max. 0.20~0.40 Cu, Nb, Ni, Mo, V
*POSHIS: POSCO High Strength Spring Steel

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

쾌삭강 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S
POSGRAM70 0.67~0.73 2.20~2.50 0.15~0.35 0.035 Max. 0.040 Max.
*POSGRAM: POSCO Graphite Steel for Machinability

Carbon Steel for CHQ

심가공 냉간압조용 탄소강 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S S-Al
POSCH6ASP 0.08 Max. 0.07 Max. 0.25~0.45 0.040 Max. 0.050 Max. 0.02 Min.
*POSCH6ASP: POSCO Cold Heading, 600Mpa, Al Killed, Spark Plug Application

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 Resistance Steel

내후성강 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S S-Al Cu Ni Cr
POSTEN30W 0.33~0.38 0.15~0.35 0.65~0.95 0.030 Max. 0.030 Max. 0.01~0.06 0.20~0.50 0.20~0.50 0.60~0.90
*POSTEN30W: POSCO Tensile, Target Carbon Content, Weathering

Non Heat Treatment Steel

비열처리강 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S S-Al Ni Cr Ti V others
POSMA45R 0.43~0.47 0.20~0.40 1.10~1.50 0.030 Max. 0.03~0.06 0.01~0.07 0.20 Max. 0.15 Max. 0.03 Max. 0.11 Max.
POSMA45RM 0.43~0.47 0.15~0.35 1.10~1.40 0.030 Max. 0.03~0.07 0.01~0.07 0.20 Max. 0.25 Max. 0.04 Max. 0.07 Max.
POSMA45RS 0.43~0.47 0.15~0.35 1.10~1.40 0.030 Max. 0.03~0.07 0.01~0.07 0.20 Max. 0.25 Max. 0.04 Max. 0.07 Max.
POSNH4 0.02~0.07 0.20 Max. 0.30~0.60 0.030 Max. 0.030 Max. 0.01~0.07 0.10 Max. 0.10 Max. - -
POSNH6 0.06~0.12 0.10~0.30 0.50~0.80 0.030 Max. 0.030 Max. - 0.10 Max. 0.30~0.50 - -
POSNH9S 0.23~0.29 0.10~0.30 1.30~1.60 0.030 Max. 0.030 Max. 0.01~0.07 0.10 Max. 0.10~0.30 - 0.05~0.20 Nb:0.005~0.02
*POSMA: POSCO Micro Alloyed
*POSNH: POSCO Non Heat Treatment

Alloy Steel for CHQ

냉간압조용 합금강 규격기호에 따른 화학성분 정보
Designation Chemical Composition (%)
C Si Mn P S B Cr Ti
POSA1021B 0.18~0.23 0.30~0.50 0.50~0.80 0.035 Max. 0.040 Max. 5ppm Min. 0.30 Max. 0.07 Max.
POSA1022B 0.18~0.23 0.15~0.30 0.70~1.00 0.020 Max. 0.020 Max. 5ppm Min. 0.25 Max. 0.01~0.05
POSA1038B 0.34~0.42 0.10~0.30 0.60~1.20 0.030 Max. 0.040 Max. 5ppm Min. 0.35 Max. -
POSA15B24H 0.22~0.28 0.15~0.35 0.90~1.20 0.025 Max. 0.025 Max. 5~30ppm 0.10~0.20 0.01~0.03
POSA5120BH 0.17~0.22 0.15~0.35 0.70~0.90 0.035 Max. 0.040 Max. 10~40ppm 0.70~0.90 0.02~0.05
*POSA: POSCO Automobile