No, he said he had another use for it in addition to that one. He’s apparently using it as a form to shape something, what exactly that is we don’t know.

You're right, I just spent 34 years playing piano in a whorehouse. :rolleyes:

The following is from a supplier of S5 and S7 steels:

https://www.hudsontoolsteel.com/technical-data/steelS5

S5 Shock-Resisting Tool Steel
S5 Shock-Resisting Tool Steel is a silicon-manganese tool steel which exhibits the highest impact toughness among all of the “S” type steels. The high toughness and the ability to be hardened to 62 Rockwell C make S5 an excellent choice for applications that require higher strength than S7 shock-resisting tool steel. The steel is typically hardened using an oil quench, but for simple geometries, the steel may be water quenched.

APPLICATIONS: Pneumatic tools, shear blades, mandrels, heavy-duty punches, and stamping dies.

S7 Shock-Resisting Tool Steel
S7 Shock-Resisting Tool Steel is an air or oil hardening tool steel that is characterized by very high impact toughness. The combination of strength and high toughness makes it a candidate for a wide variety of tooling applications. It can be used successfully for both cold and hot work applications. Also suitable for hot work tools where the operating temperature does not exceed 1000°F (538°C). For plastic injection molds, S7 tool steel is available as a remelted, mold-quality product. The remelting process minimizes the number and sizes of nonmetallic inclusions in the steel, and thereby enhances the polishability for critical cavity, insert, and other tooling surfaces.

APPLICATIONS: Recommended for cold work tools that require resistance to high impact and shock loading, such as shear blades, swaging dies, gripper dies, chisels, and punches.

LOL! no way to talk about Boeing :D

you two... Splitting hairs for what?.. Shaun is pushing some thin aluminum around . . and with a hammer no less.

Both of you are offering up WAY more detail than anyone is reading. Including this M.E.

Here is what Shaun needs to know: git sum steel.. the heavy kind. Whack it with a hammer until ya need another piece of steel. git another piece of steel ....or a softer hammer.

Yer welc'm

It's just a fun little project that has to do with a 4.0L MFI motor.

Yeah, I appreciate the intrigue, but that's not going to get you any decent suggestions from those of us that tinker with metal.

There might be a better way to make whatever part you have in mind, but we'll never know...

Thanks JR, my process is the best solution for what I want to do. It's tested, slightly modified, it's quick, it works, it's cheap. I just need proper steel.

Back to the original question...

I've never found a good solution to how much force does a hammer supply. When I'm designing slugging tools, I just use 10,000 lbs to make life easy, but there is around 1,000 to 2,000 lbs of force or more per pound of hammer weight.

So with a 2.5 pound hammer you're applying at least 2,500 lbs to the plate on impact. If the hammer head is 2" in diameter and the plate is 1/4" thick, the 2,500 is applied over 1/2 sqin so stress at the point of impact is over 5,000 psi which is less than the yield strength of even plain carbon steel. You're most likely still getting deformation in the 1/4" plate so the impact force is much higher than 5,000 lbs and/or the impact force is not evenly distributed over the 1/4" wide by 2" long contact area so the impact force is spread over a smaller area resulting in deformation.

This uncertainty on hammer force is one reason slugging tools are usually designed with a wide contact area which can be blended smooth once the steel has mushroomed too much.

Exactly. I started out as simple as possible, without getting into any detail whatsoever, understanding that Shaun probably really doesn't give a rat's ass about material sciences. Yes, we could spec out the perfect material to beat the hell out of with a hammer. Or, we can follow the old adage of "Russian Engineering": "Perfection is the enemy of good enough".

All well and good until your typical way-too-proud-of-himself junior engineer comes along eager to show off his "knowledge" and only succeeds in doing what they do best - introducing needless complication.

Shaun, sorry about the distraction. Get something heat treatable, through hardening steel plate, tell the shop that will be prepping it for you what you want out of it, and sit back and wait. Any of the commonly available 4000 series or the less commonly available "S" grade steels will be just fine for what you want.

4L - I hope you are using a case made of Mg - it has the "structural integrity of congealed butter"

Al is no fun - just sits there and takes it

Helping Jeff tune and video him on Gee-Tar
 

Higgins Quote....."You're right, I just spent 34 years playing piano in a whorehouse."



Yes, Honestly, This IS Jeff.



I filmed it.



let me know if you want the Behind the Scene Special Edition DVD coming out.


https://www.youtube.com/watch?v=2Y7J23RzTyI




jeff jeff jeff.


What would your Nuns and Mother Superior say back in the Catholic Convent of Eternal Shame and pain wacking your hands with a ruler..........what would they say to you ?

What they DID, in fact, say to me at the ripe old age of 13 was "you're expelled - get the hell outa here and don't come back". Honest. Expelled from CCD at 13. One of my more notable achievements.

Don't F with a Penguin





https://youtu.be/ujxDA9VsQG4?t=77

One of the catorce cases.

great looking stuff - did you buy from the early run for a discount?

I've never heard of these. Can you elaborate?

https://rennlist.com/forums/911-forum/1003184-i-am-making-reproduction-porsche-engine-cases.html

and


https://www.taorminaracingdesigns.com/

yes

http://forums.pelicanparts.com/porsche-911-technical-forum/965650-so-someone-manufacturing-new-3-6-cases.html

but jump to here, page 13

http://forums.pelicanparts.com/porsche-911-technical-forum/965650-so-someone-manufacturing-new-3-6-cases-13.html

and go back if you want

No, I'm a perfectionist who wants to learn and understand every detail in everything I do. It can be a bit of a problem at times but perfection, and understanding how it's achieved, is it's own reward, one that I constantly strive for. There's a reason I score less than 1% of population in every personality test I take.

ok, then... Rockwell is a hardness scale

there are (at least 3) different scales - but all I see is A and C

"B" is used for softer metals, like aluminum and brass. "C" is used for harder steels. "A" is hardly ever used. We use the "Brinell" scale for really soft metals, like lead and tin.

The numbers generated are simply a relative hardness. We press a really hard steel ball (sometimes tungsten) into the material under a known load, and measure the depth of the dent it leaves. Pretty cave-man, really. But it does give us a useful number.

I mentioned way back in post #8 that the hardness we are looking for is measured on the "C" scale. Any machine shop will know what that means.