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  Spring Steel Wire Rod
There are two types of spring steels: coil spring and torsion bar produced through hot forming and used for automobile suspension system; and wire spring made by cold forming and used for electronics, precision machinery and furniture. Wire rod for springs must have high elasticity limits to prevent plastic deformation. It must also possess defect-free surface to ensure high fatigue limits and good dimensional precision for improved operation. The main usage is for coil springs and stabilizer bars.
JIS: SUP 3, 6, 7, 8, 9A, 10, 11A, 12, 13
SAE: SAE9254, 9260
DIN : 50CrV4, 55Cr3



    Wire Rod for Bearing Steel
To withstand repeated loads and high-speed rotations during operation, bearing steel requires a high degree of durability. This type of steel is used in a variety of industrial machine parts, including ball bearings and ring bearings.
JIS : SUJ 1-5
SAE: SAE52100



    Carbon Steel Wire Rod for Cold Heading and Cold Forging
Wire rod for cold heading quality is cold headed, forged or extruded to make bolts, nuts or screws used widely in automobile parts and industrial machines. This steel requires strict quality control because the steel is placed under severe working conditions and used for special purposes. Therefore it should be handled with utmost care to prevent surface flaws.
POSCO: CH6ASP
JIS: SWRCH 6A-22A, 10K-50K
SAE: SAE 1006-1050
DIN: DIN 1654



    Piano Wire Rod
Often used in high strength bead wire, LR PC steel wire and music wire, this type of rod is made from high-carbon steels with excellent filamentary drawability, high strength and fatigue resistance.
JIS: SWRS 62-92A/B



    Wire Rod for Tire Cord
Manufactured through drawing (0.4-0.15mm ) and cording of high carbon steel wire rods, steel cord is used to reinforce the durability of automobile tires. This wire rod type requires particularly clean and high-strength steel.
POSCO: POSCORD 70, 70S, 80
ASTM : AISI1069, 1080



    Wire Rod for High Strength Steel
This PC bar type steel is used in reinforcing the concrete in telegraph poles and piles. Structural carbon steel containing traces of boron, or a large amount of silicon, undergoes high-frequency heat treatment to produce this type of wire rods. Compared with mild steel, this steel type has higher elastic limits and lower relaxation.
POSCO: PSPC30B~35B, PSPC30Si-35Si
SAE: SAE10B30-35


    High Carbon Wire Rod Steel
High carbon steel products require the micro-structure of fine pearlite to maintain its high strength and to ensure its wire drawability. This steel is used in wire ropes, precision springs, bead wires and general PC steel wires.
JIS: SWRH27-72
SAE: SAE 1026-1095
DIN: D26-2, 95-2



    Free-Cutting Carbon Steel
With an addition of such free-cutting elements as P, Pb, Bi and S, this steel type is used in precision parts of automobiles and home appliances.
POSCO: POSCUT1A
JIS: SUM11-43
SAE: SAE1215, 1146, 1151



    Wire Rod for Core Wire of Covered Electrodes
Precise component control is required to ensure weldability and deposit metal quality. The wire rod slow cooling operation as well as the TS deviation control are carried out to guarantee rod drawability. The rods are used for CO2 gas-shielded arc welding wire, submerged arc welding wire and general electrodes.
POSCO: POSWELD1A, B, POSWELD 2A, B, C, POSWELD 3D, 4D, 5D
JIS: SWRY 11-21, YSW11-41, YGW11-24


    Low Carbon Steel Wire Rod
This type of wire rod is made of low-carbon steel with carbon content under 0.22%. It is used in manufacturing various kinds of steel wires, nails and wire entanglement.
JIS: SWRM6-22
SAE: SAE1006-1022
DIN: D5-1, D9-1
ASTM: A510



    Alloy Steel Wire Rod for Machine Structural Use
This steel is mainly used for the joints of mechanical parts, such as high-strength bolts and nuts. It is also used for the delivery of driving force. It is a high strength steel with an addition of such alloy elements as chromium, nickel and molybdenum.
JIS: SCr415-445, SCM415-822, SNCM220-815, SMn420-443, SMnC420-: : 443, SNC236-836
SAE: SAE1513-1548, 4118-4161, 5115-5145, 8620-8645
ASTM: A274


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