stevep1954
Well-known member
i'm wondering if anyone uses this type of steel for projects? does it hold off rusting as a benefit? i googled it and kind of know what it is i'm just not sure when or why you would use it. thanks
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pickled and oiled steel question
- Thread starter stevep1954
- Start date
SM Racing
Well-known member
I try to use it when I can get it. It will rust, but not terribly fast. I keep mine in a temperature controlled shop so I am not a good representation of rust resistance. It saves time when I am TIG welding or even MIG welding as I don't have to clean off mill scale. My tubing supplier even offers polished tubing which comes clean and smooth.
INSP380
Well-known member
No mill scale, which makes easier weld prep. Clean even finish when it comes to painting, grinding...plateing. I like it.
Steve
Steve
PugetDude
ALLIANCE MEMBER
Pickling removes the mill scale.
Oiling keeps it from rusting.
You don't want to weld through rust or flaking mill scale.
All it needs is a quick wipe with denatured alcohol and you're good to go.
You're paying the mill to do your surface prep for you.
They'll do a much better job than you....
Oiling keeps it from rusting.
You don't want to weld through rust or flaking mill scale.
All it needs is a quick wipe with denatured alcohol and you're good to go.
You're paying the mill to do your surface prep for you.
They'll do a much better job than you....
bczygan
Well-known member
Is that different than low carbon oil finished steel?
I recently bought some ACME threaded rod with that designation.
I recently bought some ACME threaded rod with that designation.
PugetDude
ALLIANCE MEMBER
Is that different than low carbon oil finished steel?
I recently bought some ACME threaded rod with that designation.
Plate, sheet, and rod all have different properties, and different finishing techniques.
You'd have to look at the ASTM number and check the chemistry, tensile strength, yield strength , % elongation, etc. to compare one to another.
OP
stevep1954
Well-known member
do you have to treat the steel any differently when priming and painting when it is P&O'ed?
rockwithjason
Well-known member
just degrease and go
38Chevy454
Well-known member
When steel is made, it is rolled out hot, bright red to orange hot temps. This creates the scale on the surface. Pickling is an acid bath that removes the scale (iron oxide). However the now bare surface needs some protection so the mill applies a light oil film to protect against corrosion. Hot rolled pickled and oiled does not have as nice of surface finish as cold rolled.
Cold rolled can also have some light oil to help prevent corrosion. HR has a thickness limit, so thinner sheet, like typically used in car bodies for example, is CR. CR also has a nicer surface that is smoother with less pits.
Cold rolled can also have some light oil to help prevent corrosion. HR has a thickness limit, so thinner sheet, like typically used in car bodies for example, is CR. CR also has a nicer surface that is smoother with less pits.
when I worked at a steel slitter, HRPO was the stuff used for frames, CRCQ was the better sheet metal, and the really rusty **** from Japan that came in the wet ship hulls was just barely oiled as it ran, was told it didn't matter as it is stored outside anyway. it was used for water heater tanks...used to take scraps home all the time, the HRPO was the stuff I always used for fabrication. just wipe and weld...
rburke65
Well-known member
Thanks everyone for the Steel 101 intro. Interesting.
My tubing supplier even offers polished tubing which comes clean and smooth.
Do they want your left arm for it there too? They want a good 20% for polished here, and all they do it run it through a machine when you buy it, takes them 20 seconds.
WhoWhatNow
Well-known member
Is cold rolled a wipe & weld type deal too or does it need prep? I'm learning TIG and 3/4 of my time is consumed by prepping the metal, lucky if I get 10 minutes of welding in.
Do the weld prep. It builds character.
I think learning to be meticulous about prep helps when learning tig. When things go wrong you have more experience to help with trouble shooting. Of course I am still learning!
SM Racing
Well-known member
Do they want your left arm for it there too? They want a good 20% for polished here, and all they do it run it through a machine when you buy it, takes them 20 seconds.
No, it was 20$ a stick for 20-24ft sticks of DOM.