As per IS & Din Standards or as per Customers
design & Specifications.
Our standard products are made
from High Carbon Colled Rolled Steel to EN 9, EN 42, EN 42J,
EN 47 & Copper, Aluminium, S.S.304, S.S.316 specification.
To achieve the best results
from the heat treatment processes, Rainbow lay down their
own Material Specifications
Carbon steels, Beryllium copper,
Phosphor bronze. Hard-drawn carbon steel wire. Hard-drawn
austenitic stainless steel (302S25). Heat-treatable martensitic
stainless steel (420S45).
All materials are checked in
the laboratory before being released for production and each
batch is coded such that any circlip manufactured in the last
10 years can be related to the laboratory record.
Circlips and Rings can be manufactured
and supplied in non-standard thickness subject to prior enquiry
We have our own Heat Treatment
plant consisting of Sekar Hearth Furnace, Salt Bath Furnace.
Different tests are carried out by qualified enginers to verify
the heat treated products.
Our products are supplied in
various finished like Bluing, Blackening, Zinc, Copper, Nickel,
Chromes & Cadmium Plating, as per the requirements of
For protection against corrosion,
zinc plated finish is available as a standard extra. Passivation
is a surface treatment which further improves the corrosion
resistance of the plated film but because of its yellow irridescent
finish may not be suitable for some decorative applications.
For decorative effect a copper flash finish may be applied