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  • Steel Wire Products
  • Ferro Alloy

Steel Wire Products



OIL QUENCHED AND TEMPERED WIRE
OT Wire containing C, Si is selectively added by the predetermined amounts of V, Cr, and Cu. Through the high quality control system, our OT Wire shows excellent performance which is not available in high carbon spring wire and music wire.
OT Wire has superior strength and toughness. It will implement excellent elasticity, ductility, better resistance against fatigue and deformation in various spring applications. OT Wire is recommended to make the springs for repeated dynamic loads, including clutch springs.


Chemical Composition

Classification Chemical   Composition (%)
C Si Mn P S Cu Cr V
Oil-Tempered Carbon Wire KS, JIS 0.53 - 0.88 0.10 - 0.35 0.30 - 1.20 Max. 0.030 Max. 0.030 - - -
ASTM 0.55 - 0.85 0.15 - 0.35 0.30 - 1.20 Max. 0.040 Max. 0.050 - - -
EN(FD) 0.60 - 0.75 0.10 - 0.35 0.50 - 1.20 Max. 0.030 Max. 0.025 Max. 0.12 - -
Oil-Tempered Cr-Si Alloyed Wire KS, JIS 0.51 - 0.59 1.20 - 1.60 0.50 - 0.90 Max. 0.035 Max. 0.035 - 0.55 - 0.90 -
ASTM 0.51 - 0.59 1.20 - 1.60 0.60 - 0.80 Max. 0.035 Max. 0.040 - 0.60 - 0.80 -
EN(FD) 0.50 - 0.60 1.20 - 1.60 0.50 - 0.90 Max. 0.030 Max. 0.025 Max. 0.12 0.50 - 0.80 -
Oil-Tempered Carbon
     Wirp for Valve Spring		 KS, JIS 0.60 - 0.75 0.12 - 0.32 0.60 - 0.90 Max. 0.025 Max. 0.025 Max. 0.20 - -
ASTM 0.60 - 0.75 0.15 - 0.35 0.60 - 0.90 Max. 0.025 Max. 0.030 - - -
EN(VD) 0.60 - 0.75 0.15 - 0.30 0.50 - 1.00 Max. 0.020 Max. 0.020 Max. 0.06 - -
Oil-Tempered Cr-Si Alloyed
     Wire for Valve Spring		 KS, JIS 0.51 - 0.59 1.20 - 1.60 0.50 - 0.80 Max. 0.025 Max. 0.025 Max. 0.20 0.50 - 0.80 -
ASTM 0.51 - 0.59 1.20 - 1.60 0.50 - 0.80 Max. 0.025 Max. 0.025 - 0.60 - 0.80 -
EN(VD) 0.50 - 0.60 1.20 - 1.60 0.50 - 0.90 Max. 0.025 Max. 0.020 Max. 0.06 0.50 - 0.80 -
Oil-Tempered Cr-Si-V Alloyed Wire
     for high Strength   Valve Spring		 KS, JIS 0.63 - 0.68 1.20 - 1.60 0.50 - 0.8 Max. 0.025 Max. 0.025 - 0.50 - 0.80 0.10 - 0.20
ASTM 0.55 - 0.70 1.20 - 1.65 0.50 - 0.8 Max. 0.025 Max. 0.025 - 0.50 - 0.80 0.08 - 0.25
EN(VD) 0.50 - 0.70 1.20 - 1.65 0.40 - 0.9 Max. 0.020 Max. 0.020 Max. 0.06 0.50 - 1.00 0.10 - 0.25

Packing

Dia.   (mm) Block   Dia. (Inch) Carrier   / Coil (Kg)
0.50 - 0.79 16 100
0.80 - 1.99 24 300
1.50 - 3.20 36 500
3.00 - 4.99 48 200 -   1,000
5.00 - 8.00 60 500 -   1,000
8.00 - 16.00 70 1,000 - 2,000

• Z2, Spool and Wooden Reel Packing are available in the range of 0.5 ~ 2.3mm, according to customers' requirements.

Reference Specification

Classification Chemical   Composition (%)
KS JIS ASTM EN
Oil-Tempered Carbon Wire SPEC KS D 3579 JIS G 3560 ASTM A 229 EN 10270-2
GRADE SWO-A, B SWO-A, B Class 1, 2 FDC
Oil-Tempered Cr-Si Alloyed Wire SPEC KS D 3579 JIS G 3560 ASTM A 401 EN 10270-2
GRADE SWOSC-B SWOSC-B - FDSiCr
Oil-Tempered   
     Carbon Wire for Clutch   Spring		 SPEC - - - EN 10270-2
GRADE - - - TDC
Oil-Tempered
     Cr-Si Alloyed Wire for Clutch Spring		 SPEC - - ASTM A 1000 EN 10270-2
GRADE - - GRADE A TDSiCr
Oil-Tempered
     Carbon Wire for Valve Spring		 SPEC KS D 3580 JIS G 3561 ASTM A 230 EN 10270-2
GRADE SWO-V SWO-V OT Carbon Valve VDC
Oil-Tempered
     Cr-Si Alloyed Wire   for Valve Spring		 SPEC KS D 3580 JIS G 3561 ASTM A 877 EN 10270-2
GRADE SWOSC-V SWOSC-V GRADE A VDSiCr
Oil-Tempered
     Cr-Si-V Alloyed Wire   for Valve Spring		 SPEC - JIS G 3561 ASTM A 877 EN 10270-2
GRADE - SWOSCV-V GRADE B VDSiCrV