Panzer IV armour layout.

Discussions on the vehicles used by the Axis forces. Hosted by Christian Ankerstjerne
ThatZenoGuy
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Re: Panzer IV armour layout.

#31

Post by ThatZenoGuy » 18 Oct 2021, 12:05

Peasant wrote:
18 Oct 2021, 12:01
20mm/73° is almost the same as Pz.IV glacis plate. Interesting.
Cast armor is a lil weaker than RHA IIRC. So that might be some factor.

Peasant
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Re: Panzer IV armour layout.

#32

Post by Peasant » 18 Oct 2021, 12:50

ThatZenoGuy wrote:
18 Oct 2021, 12:05

Cast armor is a lil weaker than RHA IIRC. So that might be some factor.
Although the turret is cast, the roof is an RHA plate welded on top afterwards.


ThatZenoGuy
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Location: Australia

Re: Panzer IV armour layout.

#33

Post by ThatZenoGuy » 19 Oct 2021, 04:54

Peasant wrote:
18 Oct 2021, 12:50
ThatZenoGuy wrote:
18 Oct 2021, 12:05

Cast armor is a lil weaker than RHA IIRC. So that might be some factor.
Although the turret is cast, the roof is an RHA plate welded on top afterwards.
Ahh, understood! Thank you!

Peasant
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Location: Ukraine

Re: Panzer IV armour layout.

#34

Post by Peasant » 29 Nov 2021, 16:10

For context: at this velocity this projectile is rated to defeat an 89mm vertical plate. Even though some fragments of the armour were projected through to the other side, it's still impressive and shows just how effective even a thin plate can be at extreme obliquities, at least against good quality sharp tipped AP rounds that remain mostly intact throughout the process. Perhaps the softer blunt tipped soviet shells would be superior under similar conditions.

Image

critical mass
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Re: Panzer IV armour layout.

#35

Post by critical mass » 29 Nov 2021, 16:19

The a posteriori breakage Pantern of the 75mm M72, indicates to me that the Simulation does not account for sheath hardening employed in US AP. They would bend more with breakage starting at the lower bourrolet in these sort of impacts. Against thick vertical plate, they do shatter frequently.

Peasant
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Location: Ukraine

Re: Panzer IV armour layout.

#36

Post by Peasant » 29 Nov 2021, 17:34

critical mass wrote:
29 Nov 2021, 16:19
The a posteriori breakage Pantern of the 75mm M72, indicates to me that the Simulation does not account for sheath hardening employed in US AP. They would bend more with breakage starting at the lower bourrolet in these sort of impacts. Against thick vertical plate, they do shatter frequently.
Interesting observation. I should ask the Dejmian whether the material he uses for the shell is isotropic or not.
Say, do you know of any experiments carried out with a hardening pattern for the AP shell where the hardest portion is located along the central axis, with the radial layers of the cylindrical body tempered to progressively lower hardness? The goal would be to produce a shell that can bend at it's bourrolet without suffering a transversal fracture like this, even at the expense of nose integrity under high velocity impact against thick vertical plate?

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