I think the key is the contact surfaces the shell makes with the inside of the cannon. It is the reason lead was use for gun bullets. You want a softer metal against the hard steel surfaces inside the cannon.
Self Propelled Gun/Rocket Launcher
- Thread starter FORBIN
- Start date
I thought the reason was lead is heavy. But it seems strange to spend money on the brass and the plating process when u can just use a softer grade of steel and spray the outside.
LZ13 81JTJ 162U
Artillery Battalion
1st Company
2nd Company
3rd Company
Commanding Post
Hello. Are any cluster or anti-tank munitions known for Chinese +300mm MLRS? Like Russian 9M55K5?
the strength of the material is steel but the coating is what determines the surface chemistry i.e. wear and corrosion. brass is a solid state sealant and lubricant. with brass plated steel you can have very tight tolerances where the brass plate presses against the barrel, and it will still be able to slide in and out of the breech. the tighter the tolerance, the less gas escapes.
meanwhile due to high friction between the barrel and the ammo. anyone who has worked with threaded steel fastners is familiar with this and is why copper based anti-seizing lubricant is used for blind threaded holes with steel fasteners.
72nd GA 90th Bridge Artillery Batallion
Whole company of PCL171s, supported by CTL181A 6x6 vehicles carrying extra personnel and ammo
Recon and Observation Vehicle in position
Commanding Post Vehicle setting up
First salvo
Transistioning to the second predesigned firing position
Second salvo
Whole company of PCL171s, supported by CTL181A 6x6 vehicles carrying extra personnel and ammo
Recon and Observation Vehicle in position
Commanding Post Vehicle setting up
First salvo
Transistioning to the second predesigned firing position
Second salvo