SHELL 155mm HE M1A4 ERFB (BT)
Weapon : BOFORS FH77 B HOWITZER Gun
End Use : Surface to Surface Anti-Personal Ammunition used for rapid & accurate firing at long ranges to attack the Ground Targets.
Shells can be used together with PD or proximity Fuzes.The shells are filled with TNT Special Grade (Set point 80.60 C) in semi-automatic plant by pour filling method.
Material of Empty Shell
Shell Body : Steel to Spec. AISI 9260 hot rolled, semifinished forging (Phosphate treatment of Iron and Steel for protection of Iron : IS-3618-66 CLASS B). Driving Band : Gilding material Copper Alloy 220 annealed. turator : Liner low density Polyethylene
Fuze used
PDM 572C1 (SQ/Delay Mode), Zelar and Elect. Fuzes M85P13PD3, M85P13A3
Primer used
M191 A2 (Percussion Type)
Compatible Charge
Charge-8 & Charge-9
Main Components/Sub-assemblies
Boat Tail unit, Modified Aluminium Liner, Obturator, Felt pad, Scuff Protector, Plug Lifting, Grummet Assy.Packing Item – MOP 12 (wooden)
Nature of HE Filling
TNT Spl. Grade (99%), NC (0.5%), HNS (0.3%) & PNT(0.2%)
Density of HE Filling
1.54 g/cc (min)
Filling Mass
8.71 Kg
Mass of Shell
42.84 to 45.34 Kg (without Fuze)
Overall Length of Shell
842.25 mm
Max. Chamber Pressure
397 ± 7 MPa (with Charge-9)
Muzzle Velocity
827 m/s
Shelf Life
15 Years
Range
30 Km
Ordnance Factories Institute of Learning, Khamaria (OFILKH)
Ordnance Factory Badmal, Bolangir
Ordnance Factory Dehuroad (OFDR)
Ordnance Factory Varangaon (OFV)
