DID 60 standard roller chain - Big Bike Webshop

Technical Data Corrosion Resistance Against Various Substances
Rust Prevention of DK Conveyor Chain
DK Conveyor Chains are coated with a rust prevention oil diluted by light oil (we call it "P oil") unless otherwise
specified. Rust prevention by P oil is effective for two to three months indoors. Specify NP-2, a rust prevention oil
diluted by JIS solvent, for a longer effect when using chains for export or installation work etc. For a sewage chain low
in operation frequency, considering corrosion resistance during service as well, a more adhesive tarry rust preventing
oil NP-1 (JIS standard) is recommended. Our rust prevention oils are listed below. Note that lubricating effect cannot be
expected from these oils, and that chain lubrication is required irrespective of their use.
Rust prevention type Features Application
P oil
Rust prevention oil
diluted by light oil
For general use
NP-2
JIS rust prevention oil
For export
with a thicker film than P oil
NP-1
A more abrasive tarry JIS
rust preventive oil
For sewage chain, etc.
NP-19
Coating
Transparent semi-drying
For spare chain components
powerful JIS rust prevention oil
Contact us concerning a specific application
For your information
Stainless steels
Stainless steels can be classified into four types, austenitic stainless steel, ferritic stainless steel, martensitic
stainless steel, and quench hardened stainless steel.
Technical Data
Corrosion Resistance
Austenitic stainless steel Ferritic stainless steel Martensitic stainless steel Quench hardened stainless steel
Name in reference to main elements 18Cr-8Ni stainless steel 18Cr stainless steel 13Cr stainless steel 17Cr-4Ni stainless steel
Typical steels SUS 304 SUS 430 SUS 403 SUS 630
SUS 316 SUS 410
SUS 420
SUS 431
Heat treatment and features All the alloy elements are melted Not hardened. Since it is as Like ordinary steel, it is Like austenitic steel, this is
into the base metal at a soft as pure iron, it is not hardened and tempered. solution-treated, but later
temperature higher than 1000°C, suitable for applications Since it is as hard as ordinary aging-treated to partially
and the mixture is quenched. requiring strength. It is rather steel, it is often used. However, quench alloying ingredients
(Solution treatment) The steel is poor also in corrosion it is slightly poor in corrosion for hardening, to raise the
excellent in corrosion resistance resistance, but since it is resistance.
strength. It is excellent in
and high enough in ductility to be inexpensive, it is used instead
both strength and corrosion
cold-worked.
of austenitic stainless steel.
resistance.
Corrosion resistance High Low Low Medium
Hardness Low Low High High
Viscosity Large Large Large for the hardness Large
Wear resistance Low Low Large Large
Cautions Intergranular corrosion, pitting corrosion, Sigma embrittlement Hydrogen embrittlement cracking
and stress corrosion cracking and 475 °C embrittlement
Applications Various chemical equipment Stainless steel sinks Cutting tools Mechanical parts Mechanical parts with high strength
High quality tableware Light corrosion resistant parts with high hardness and high corrosion resistance
SUS304, a typical austenitic stainless steel, is considered to be non-magnetic, but when used in chains, since it is coldworked
and extensively processed to achieve high-strength, it is slightly magnetic. Since the magnetism is extremely
weak compared to that of iron and steel, the chain can be used for ordinary applications without any problem. However,
consult us for an application very sensitive to magnetism such as the production of electronic parts.
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