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Sheet metal input Answered

Fixin’ to make to magnetic board and need some input on what to purchase. I’m seeing several types of sheet metal. There’s plain sheet metal, zinc plated, cold rolled, weldable, galvanized, etc. Is there a particular type I should purchase? Hoping to avoid anything that will tarnish or leave marks on any paper out on the board. Thank you for your input!

Discussions

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handbagsmini

2 months ago

Cold rolled is 'rolled' after it has cooled so it gives it a nice finish without the mill scale.

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Jack A Lopez

2 months ago

After thinking about this topic long and hard, I suggest you solve this problem of too many choices for what to purchase, by intentionally NOT purchasing anything.

Instead you should steal something suitable, for to use as a magnetic bulletin board.

You see, the material you want is sheet steel,

https://en.wikipedia.org/wiki/Carbon_steel

and that material is used to make a huge number of things, already cluttering up this world, just sitting around waiting around to be picked up.

Some examples: refrigerator doors, old filing cabinets, old desktop computer cases, cars. These are all made out of sheet steel!

Plus I think there will be some opportunities for humorous puns, based on the fact the English words "steel" and "steal" are pronounced exactly alike. (i.e. homophones)

Here's an example. Someone sees you pulling an old filing cabinet out of a dumpster, and she asks, "Is that steel?"

And you reply, "It is steal at this price!"

Ha! Ha! Ha!

;-P

As a practical note, you should carry a small magnet with you, wherever you go. That way when you discover some artifact that might be worth carrying home, you can do a quick check with the magnet to confirm if it is indeed a kind of metal that magnets will stick to.

You know, because it would be, like, a huge hassle if you went to the trouble of bringing home some big pretty piece of metal, a stop sign perhaps, only to discover it is made of aluminum alloy, and thus unsuitable for your project, after you got it home.

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bravoechonovember1Jack A Lopez

Reply 2 months ago

if the piece of metal was blueish green people would ask "is that teal?" and you could say "it's certainly a deal!"

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Jack A Lopezbravoechonovember1

Reply 2 months ago

Hey! Nice one!

Coincidentally, your pun reminds me of Rearden metal, a fictional super-alloy from Ayn Rand's novel Atlas Shrugged, which was said to be greenish-blue in color.

Rearden Metal is a greenish-blue alloy invented by Hank Rearden. Lighter
and stronger than traditional steel, it is to steel what steel was to
iron. Among its ingredients are iron and copper, two metals seldom found
together in real-world structural alloys.


That unsourced quote is from Wikipedia's, "List of fictional elements, materials, isotopes, and subatomic particles", here:

https://en.wikipedia.org/wiki/List_of_fictional_el...

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bravoechonovember1Jack A Lopez

Reply 2 months ago

interesting that titanium is blue and has a tensile strength of almost 3 times that of steel. which makes it more then what steel was to iron. So the real might be better than the unreal in this case!

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iceng

2 months ago

I have a three section vanity mirror medicine cabinet with steel backing the thin glass which presumably was done to control weight..

This works exceedingly well for NIB magnets :-)

Further more, the cabinet has withstood bathroom moisture without rust.. The back side is painted white and helps hold a multitude of magnetic things..

Click the pic to see the whole image !

NIB_7164.jpgTACKS.jpg
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Yonatan24

2 months ago

What are you making?

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gandymarsh

2 months ago

Plain steel sheet will rust very quickly. I would use galvanized.

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jpmarthgandymarsh

Reply 2 months ago

Good to know. Thank you. Sounds like zinc plated has the same benefit. Is that correct?

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bravoechonovember1

2 months ago

weldable steel (I'm pretty sure that's hot rolled) is covered in mill scale which helps prevent it from rusting but it doesn't look that good. Cold rolled is 'rolled' after it has cooled so it gives it a nice finish without the mill scale. Structurally the two types of steel are, I believe, different which you shouldn't have to worry about. Plain sheet metal is steel that is in the form of a sheet without any covering to prevent rust. Zinc plated and galvanized are both metals that are covered in zinc but have it applied in different ways (hot dipped vs electroplating.)

You might think about a different option: using a sheet of steel bolted to a sheet of aluminum to give it a nice look and feel.

(Also take this with a grain of salt because I'm not no expert)

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blurbike

2 months ago

My friends and I use a large galvanized oil drip pan. It looks good and they are relatively inexpensive.