Products and Services

Spring Steel Wire “ITW®”pdfProduct catalog

JIS Q9001:2008/ISO9001:2008 approved

The application of short time induction quenching and tempering offers the benefits listed below.

  • Realization of uniform fine structure and mechanical properties along the wire entire length
  • Almost no decarburization
  • Realization of high strength and toughness
  • Realization of high cold formability
  • Ability to form springs with fatigue resistance, sag resistance and stability

Widely used not only in the suspension of two and four-wheeled vehicles, but also in general industrial applications, “ITW™” is a high-strength spring steel wire that complies with JIS G 3560 and JASO (Japanese Automotive Standards Organization) C605-96 and features equal levels of tensile strength and reduction of area in all wire diameters between φ5.0 and φ17.0. (Not usable in valve springs)

Mechanical properties

Name Symbol Tensile strength Reduction of area
Silicon chrome steel
Oil tempered wire for spring
SWI-150
SWI-165
SWI-180
SWI-190
SWI-200
1450~1550
1600~1700
1750~1850
1850~1950
1950~2050
35 min
35 min
35 min
35 min
35 min

Comparison of SWOSC-B and Neturen's ITW
PDF(24kb)

pdfProduct catalog

Click here to download Adobe Reader. Adobe Reader