Lifetime Rust-Free Security — India's Verified SS Window Frame & Grill Fabricators for Every Climate

How do I distinguish SS 304 from SS 202 (low-grade stainless)?

Request the mill test certificate (MTC) which shows chemical composition. SS 304 has 18% Chromium + 8% Nickel; SS 202 has reduced Nickel (lower than 4%) and higher Manganese. You can also use a magnet test: SS 304 is weakly non-magnetic while SS 202 may be slightly magnetic, though this test is not definitive.

What is the right tube size for residential window grills?

Standard residential window grills use 19mm or 25mm round/square SS tubes with 1.2-1.5mm wall thickness. Security grills require 16-20mm solid SS bars or 25x2.5mm heavy tubes. Spacing between bars should not exceed 100mm for child safety.

Can SS window grills be installed in old buildings with RCC frames?

Yes. Chemical anchors (epoxy-based) are used to drill and fix grill frames into RCC or brick walls. This is the correct method for SS grills — carbon steel expansion bolts should be avoided as contact causes galvanic corrosion and rust staining on the SS frame.

What is the cost difference between MS and SS window grills?

SS 304 grills cost approximately 2.5-3.5x more than MS grills upfront. However, over a 15-year lifecycle, SS grills are typically more economical when repainting, anti-rust treatment, and premature replacement costs for MS grills are factored in — especially in coastal and high-humidity environments.

Do SS window grills require any maintenance?

SS 304 grills require minimal maintenance. For inland locations, an annual wipe-down with mild detergent and water is sufficient. Coastal locations (SS 316) require monthly rinsing with fresh water to remove salt deposits. Never use bleach or chlorine cleaners on stainless steel.