1950s era stainless clad PV plate 2

[Guest102023]

Can any of you oldtimers recall what was the going technology for cladding 1/8" thick SS on steel plate? In this case it is grade 405 (ferritic SS) on an unknown grade of carbon steel; it is not welded.

If roll bond is the answer, what bond strength was attainable?

(Sorry to cross post, but no responses were forthcoming in the B&PV Engineering section)

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"

 

[SnTMan]

brimstoner, I don't go back THAT far, but at a guess, roll bond and 20 ksi shear.

Regards,

Mike

 

[Guest102023]

Somebody mentioned that, but he is even younger than you or I. I cannot imagine anyone made explosively bonded PV plate yet.

That's the problem with the internet - nothing on earth could happen before it was invented.

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"

 

[SnTMan]

I could ask, "How do you know how young I am?" Nah

 

[Guest102023]

You and I are not old, just old enough to know better.

How was that?

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"

 

[metengr]

Roll bonding.

 

[SnTMan]

I'll bet metengr KNOWS

 

[weldstan]

Roll bonding was the cladding method.

 

[blacksmith37]

Try "Horton Clad" by CBI, I think it was a roll bonded. I believe I looked at explosion bond from Horst in the late 60's .Amoco was using Ti clad CS in '70, but I am too senile to remember how it was made. Also we had no problems with that bond, only hydriding of the Ti.

 

[Guest102023]

blacksmith37

Thanks!
Sounds like you came by your moniker honestly ;-)

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"

 

[Guest102023]

Here is what the FCCU-facing 405 surface looks like. 1% H2S + hydrocarbons at 800°F. Core hardness is 175HV1, dark area near to surface 245HV1.

Sigma is not possible, and there seems too much ductility in the fracture event to believe 885°F embrittlement is significant. I suspect sulfidation - any comments?

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"