The test is designed to mimic a knife attack from a potential burglar attempting to cut through a security window or door screen. The first test is the Australia Standard designed to measure steel mesh strength, known as AS5041-2008 for Knife-Shear. In both cases, the strength and corrosive resistance of 316 demonstrates how it significantly outperforms competitors. Two standard tests applied to security screens particularly highlight the superior performance of the 316 marine grade stainless steel used by Invisi-Gard in their stainless steel security doors and windows. However, beware – a mesh which looks flat on the surface may still fail industry standard tests if it has been woven with a wire of less tensile strength. When comparing products, an easy way to see quality is to look at the flatness of the surface. Specialised weaving equipment and techniques are utilised to ensure the mesh is kept flat and straight during construction. The high tensile properties of the wire used by Invisi-Gard make the weaving process more challenging, but ultimately produce a stronger result. Width versus strengthĪ further factor influencing the performance of a security mesh is the weaving process. A key factor which differentiates Invisi-Gard products from their competitors is they source and use only the highest quality mesh which is consistently quality controlled and accredited under international standards such as ISO9001:2008, ISO14001:2004, ISO17025 and OHSAS18001:2007. In the case of window and door security screens, required to be exposed to the elements over long periods of time, it makes sense that corrosion resistance is a fundamental consideration.īut the final word on 316 mesh comes down to quality. In fact, 316 is regarded as the standard marine grade material for this very reason. 316 contains an additional substance, molybdenum, which gives higher protection from corrosion, notably in marine environments.

However, what also sets 316 grade stainless steel apart from 304 grade is its higher corrosion resistance. While both types are used for their strength, weldability and formability, of the two, 304 grade is less expensive than 316. As well as their use in security mesh, austenitic steels are evident in a variety of applications including food processing equipment, architectural panelling, springs and boating fittings. 316 and 304 stainless steels are the most common types of a particular grade of steel known as austenitic. Stainless steel grades are determined by their composition and uses.

Security screens