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The Gazelles are being built in steel. Wherever possible the steel brought into the site for use on the vessels has mill certificates confirming its quality. We are using IS:2042 - Structural Steel (Fusion Welding Quality). However in all cases samples of steel are sent for tensile strength testing and chemical analysis which is carried out at Cochin Shipyard Ltd.
| Specification | Grade | C % Max | Mn % Max | P % Max | S % Max | Si % Max |
| IS 2062/1999 | A | 0.23 | 1.50 | 0.050 | 0.050 | 0.4 |
| B | 0.22 | 1.50 | 0.045 | 0.045 | 0.4 | |
| C | 0.20 | 1.50 | 0.040 | 0.040 | 0.4 |
(taken from The Steel Authority of India Ltd)
Coatings are being supplied by International. The recommended schedule is as follows: -
| Sr No | Area | Product Name | Dry Film Thickness (Microns) |
| 1 | Above Water |
Intergard 269 | 60 |
| 2 | Interbond 201 | 125 | |
| 3 | Interthane 990 | 50 | |
| 4 | Interthane 990 | 50 | |
| 5 | Under Water |
Intergard 269 | 60 |
| 6 | Intertuf 606 | 125 | |
| 7 | Intertuf 674 | 100 | |
| 8 | Interswift 655 A/F | 100 | |
| 9 | Interswift 655 A/F | 100 |
Only marine ply and solid woods are used - there is no chipwood. Trimmings are in mahogany
Only lead is used - no concrete or scrap metal
Masts: standard is carbon steel with SS rod inserts in the padeyes. Aluminium is available
Waterproof 10.2 oz Army Duck Cotton Canvas - the best canvas available. All rings are hand stitched with brass liners on sheets and halyards
Standing Rigging is galvanised 7 x 19 wire. Running rigging is synthetic and is supplied by one of the worlds leading manufacturers of cordage - Garware-Wall Ropes Ltd.
Fibreglass bats
Below deck: Solid brass round portlights with deadlights.
Above deck: Willy windows with round exterior brass rings.