Stainless steel is a generic term for a family of corrosion resistant alloy steels containing 10.5% or more chromium. Stainless steel does not readily corrode, rust or stain with water as ordinary steel does. However, it is not fully stain-proof in low-oxygen, high-salinity, or poor air-circulation environments.
For further information refer to ASSDA
The major difference between Grade 304 and Grade 316, is that Grade 316 has the addition of molybdenum to its chemical composition, which greatly improves its resistance to corrosion, particularly to pitting.
Grade 316 is often referred to as marine grade stainless steel because of its excellent resistance to corrosion in sea water. Please be aware that stainless steel still requires cleaning, a simple soap solution will keep your stainless steel sparkling.
18-20% Chromium and 8-10.5% Nickel
16-18% Chromium; 10-14% Nickel; 2-3% Molybdenum
Tea staining is the discoloration of the surface of stainless steel by corrosion. It is a cosmetic issue that does not affect the structural integrity of the material. It occurs most commonly within about 5km of the coast, however also occurs in polluted urban areas too.
To avoid tea staining the surface should be maintained by washing with water. A rule of thumb to follow is, when washing nearby windows also wash the stainless steel.
Further to regular cleaning, we reccomend for stainless steel specified for external purpose to be electropolished after fabrication.
For further information refer to
Our cleaning, care and maintenance page
There are many benefits of using stainless steel over galvanised wire;
Mesh – The distance between two adjacent parallel wires, measured from centre to centre of the wires
Diameter – Thickness of the wire
Mesh – The number of openings per lineal inch
SWG – Standard wire gauge
Aperture– The distance between two adjacent wires
Diameter– The thickness of the wire before weaving
Pitch– The distance between the middle point of two adjacent wires or the sum of the aperture width and the wire diameter.
% Open Area– The ratio of the area of the aperture to the area of the mesh expressed in percentage terms
Warp– All wires running lengthwise of the cloth as woven
Weft– All wires running across the cloth as woven
Calculating the aperture
Working example of calculating the aperture of 6/20 woven wire mesh
The woven wire is identified as 3.33mm aperture / 0.9mm diameter
If the aperture and the diameter are known the mesh count can be determined
Percentage Open Area
The most common and simplest weaves.Each warp wire (wire running parallel to the length of the cloth) passes alternatively over and under the wires running transversly through the cloth at 90 degree angles.
Has extra crimps in warp and weft wires between intersections.
Is produced with pre-crimped wire. Lock crimp weave is stabilised by a notch or bump at the wire intersections.
Is Produced by passing each fill wire alternatively over and under two warp wires.
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