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GP Coil Sheets
GP Coil Sheets
GP (Galvanized Plain Sheet) which is manufactured by Zinc – coating on CR Sheet. Physically it looks silver – Shiny material. GP sheets are used to manufacture ice boxes, bathroom doors, buckets, water tanks etc.
Rationalised sizes of Galvanised Plain Coils
| Thickness (mm) | Width (mm) |
| 0.35, 0.4, 0.45 | 900, 1000 |
| 0.5, 0.55, 0.6 | 900, 1000, 1100 |
| 0.63, 0.7, 0.8, 1.0, 1.25, 1.4, 1.6 | 900, 1000, 1100, 1200, 1220 |
Rationalised sizes of Galvanised Plain Sheets
| Thickness (mm) | Width (mm) | Length (mm) |
| 0.35, 0.4, 0.45 | 900, 1000 | 2500, 3000 |
| 0.5, 0.55, 0.6 | 900, 1000, 1100 | 2500, 3000 |
| 0.63, 0.7, 0.8, 1.0, 1.25, 1.4, 1.6 | 900, 1000, 1100, 1200, 1220 | 2500, 3000 |
Width 1250mm can be supplies on mutual agreement
Rationalised sizes of Galvanised Corrugated Sheets
| Thickness (mm) | Width (mm) | Length (mm) |
| 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.63, 0.7, 0.8, 1.0, 1.25, 1.4, 1.6 | 800 | 2500, 3000, 360 |
GP Coil and Sheets in 0.35 mm can be supplies by mutual agreement
Rationalised sizes of Galvanised Plain Sheets
| Thickness (mm) | Width (mm) | Length (mm) |
| 1.25, 1.0, 0.8, 0.63, 0.5, | 900,1000 | 2500 |
| 0.4, 0.35 | 900 | 2500 |
Rationalised sizes of Galvanised Corrugated Sheets
| Thickness (mm) | Width (mm) | Length (mm) |
| 1.25(18), 1.00(20), 0.8(22), 0.63(24), 0.50(26) | 810, 910 | 2500, 3000, 3600 |
Packet Weight of GP/GC Sheets
| Plant | Gp Sheets | GC Sheets |
| Bokaro Steel Plant (BSL) | 5-11 tonnes | 5-11 tonnes |
| Rourkela Steel Plant (RSP) | 3-10 tonnes | 3-9 tonnes |
Various Zinc coatings available from BSL and RSP, as per specification is: 277/2003 (with revision I of 2008) are as follows
| Class of coating | Zinx wt g/m2 | Plant |
| CL II | 450 | RSP |
| CL III | 350 | RSP |
| CL IV | 275 | RSP / BSL |
| CL V | 220 | RSP / BSL |
| CL VI | 200 | RSP / BSL |
| CL VII | 180 | RSP / BSL |
| CL VIII | 120 | RSP / BSL |
| CL IX | 100 | RSP / BSL |
| CL X | 80 | RSP / BSL |
Mechanical Properties
GP Sheets and coils available from BSL, Conforming to meechanical properties requirements as per IS 277:2003 are as follows:
| Sl No. | Quality | Yiled Stress Re Mpa | Tensile Strength Rm, Mpa |
| i) | GP | Ordinary | – | – |
| ii) | GPH | Ordinary – Hard | 400,min- | – |
| iii) | GC | Corrugated Ordinary | – | – |
| iv) | GPL | Drawing (Lock Forming) | 350, Max | 450, Max |