brass scrapper material 1

[SAEEDGH]

hi. i wand to make a scrapper like shown in picture with brass material. i tested brass sheet but it was so ductile and bent easily. i need a brass like material that has spring like property and high elasticity and low hardness In order to avoid damage to the part.

 

[dvd]

Beryllium copper is a possibility

 

[MintJulep]

beryllium dust is toxic and carcinogenic.

Very bad choice for something that will be intentionally abraded, like a scraper.

 

[geesaman.d]

I think you're dealing with fundamentally opposing requirements by expecting it won't bend but it will be soft enough to not scratch the part.

You can definitely experiment with work hardening the brass. But again, harder increases the risk of scraping your workpiece.

You can experiment with different grades of brass or bronze but either way I think you can't have a long unsupported plate of the scraper material. You'll need to sandwich the actual scraper between two plates of high hardness material (steel?).

BeCu is interesting because of it's low spark energy properties and high hardness. Agree that toxicity is a major problem to consider there. Also, do you need it to be non-sparking?

 

[dvd]

Be-Cu tools are certainly in legal use in a number of industries and applications. Dust is hazardous, but I would not expect scraper usage to generate a lot of dust. The biggest drawback is cost in my opinion.

 

[ctopher]

I agree, don't try to cut Be-Cu.
If you go to a metal supply, or woodworking store, they have brass material that is used for this purpose.

Chris, CSWP
SolidWorks
ctophers home

 

[dvd]

I have worked around Be-Cu - it can be done safely. See for example - Safety Practices for Sanding, Grinding, Buffing, Lapping and Polishing Copper Beryllium Alloys

 

[mfgenggear]

As a part time mechanic I would cut 3/8-1/2 diameter copper tubing 6-8 inch long
I would hammer one end flat. These were my scrapers
For removing gaskets. Standard copper alloy for plumbing.

 

[TugboatEng]

Lots of brass alloys. Buy a harder one.

 

[SnTMan]

A person might wonder what we are scraping off of what.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Compositepro]

Brass and copper are work hardening metals. The hardness of that scraper came from rolling the sheet flat. heat will anneal (soften) the metal but heat treatment cannot harden them. Look for the terms 1/4 hard, 1/2 hard, full hard when buying.

 

[mfgenggear]

Full hard for sure.

 

[kjoiner]

What about using a steel blade for stiffness but mounting a piece of brass at the edge.

 

[MintJulep]

In the now deleted double post I suggested.

https://alloys.copper.org/alloy/C26000

That's why you shouldn't double post.

Commercially available non sparkling scrapers are aluminum bronze.

 

[btrueblood]

Aluminum nickel bronze is a decent non-sparking cutting edge material, but finding it in full-hard thin sheet might be tricky. C51000 (510) phosphor bronze is obtainable from McMaster in spring temper (you might find other shops to give you extra-hard or extra-spring tempers which are harder yet, but realize more hard also means more brittle).

 

[EdStainless]

Follow Mint's lead.
Go to Copper.org and search by properties.
There are many Cu based alloys available as cold rolled sheet that would be hard enough for this.
Don't confuse stiffness and hardness.
The only way to increase stiffness is to make it thicker or move to a Fe based alloy.
If it is stronger then it will deflect further before it bends.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[mfgenggear]

Actually want springy like spring steel. The reason for brass or copper ally is for scraping off debri on soft surfaces like aluminum heads, or flanges, or side covers or any part that's made from soft or not as hard material.
And can get damaged from using steel spatulas.
So I made my own. While my home made worked it was to soft but plenty stiff. The method was to start as a wedge. With a tapered surface
For lack of definition it was strong. So it was stiff enough because it started out tubular.