Cold Finished Steel Bars manufactured by Kansai Metal Industry Co.,Ltd. (Carbon Steel, High Carbon Steel, Stainless Steel, Alloy Steel, Heat Resistance Steel, Titanium, Monel and others.)

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Reference

1 Cold Finished Steel Bars?

 “Cold-finished Steel Bars” mean steel bars which are produced from hot rolled and descaled steel bars or bars in coil by going through a cold drawing or cold rolling process by means of dies, grinding, cutting or a combination of these processes to obtain smooth surfaces and improved dimensional tolerances and shapes.

2 Carbon Steel?

 “Ordinary Steel” contains iron (Fe) as a main ingredient with an addition of carbon (C), manganese (Mn), silicon (Si) and so on, and is called “rolled steel for general structure”.

3 Stainless Steel?

 “Stainless Steel” is a kind of rust-resistant alloy steel that contains iron (Fe) as a main ingredient (50% or more) and chrome (Cr) 10.5% or more.

4 Why Don't Rust?

 Because it produces a thin protective film called “passive film” on its surface in the air and water.

5 Classification of Stainless Steel

Classification Characteristics Typical Grade
Martensitic
stainless steel
High strength, heat resistant and corrosion resistant
(This type of stainless steel can be hardened by quenching.)
SUS403
SUS420J2
Ferritic
stainless steel
This type of stainless steel can hardly be hardened by heat treatment and can be used in a soft condition. It is more excellent in formability and corrosion resistance than martensitic stainless steel and relatively good in weldability. SUS430
SUS447J1
Austenitic
stainless steel
This type of stainless steel is excellent in ductility and toughness, and better in formability (cold workability). It is also good in weldability and corrosion resistance. SUS304
SUS303
Austenitic and
ferritic two-phase
stainless steel
This type of stainless steel is excellent in stress corrosion cracking resistance, pitting corrosion resistance and intergranular corrosion resistance, which are the weak points of austenitic stainless steel.
SUS329J1
SUS329J4L
Precipitation
hardening
stainless steel
This type of stainless steel can become high hard by the precipitation hardening process. It is generally less corrosion resistant than austenitic stainless steel, but better than martensitic and ferritic stainless steel and has excellent characteristics as rust-resistant and tough stainless steel. SUS630
SUS631