we also use a higher CO2 content for thicker metal e.g.
BOC argoshield heavy is 20% CO2 for welding 10MM+ thick steel
https://www.boconline.co.uk/shop/en/uk/argoshield-heavy-cylinder
BOC argoshield Universal 12% CO2 for welding 4MM to 10MM thick steel...
yeah 300 series stainless steels will work harden when the wire is drawn to make them springy, you can also make phosphor bronze springs the same way. If you have a lathe its not hard to make small compression springs if you have hard drawn wire (as opposed to annealed)...
I woke up this morning and thought there might have been a powercut as my radio didnt come one when clock on my mobile phone said it was the time it should have come on.
just use a flycutter, (if you're not in a hurry and its for hobby use) but your milling machine may not have enough table travel for doing a cylinder head, and as the cutters get bigger they put more of a strain on the rigidity of the machine due to higher loading, so you get better results...
in the smaller sizes slot drill are essentially like a twist drill that is flat at the end, but the cutting edges go to the centre so they can "plunged" into a piece of metal (like drilling a hole)
end mill gererally have 4 or more cutting flutes and cut the side of a piece of metal and the...
well I bought a gallon of 98% concentrated sulphuric acid in the early 1990's over the counter with no questions asked, couldnt possibly comment if I have any left.
its not the chemicals that are the problem, its the people that are misusing them that are the issue.
looks like the list has some new things added to it at the end of last year
https://www.gov.uk/government/publications/supplying-explosives-precursors/supplying-explosives-precursors-and-poison
one of them is Hexamine, better know and the tablets for fueling toy steam engines and camping...
I went to the Royal Armories museum this weekend and outside there was Knife Angel
a thought provoking sculpture, made from 100,000 knives and blades from all areas of the UK, that have either been seized by police or collected from Knife amnesty boxes...
my sister got a couple of steaming trays for an air fryer, 3 of the welds were broken on it
and the legs ended up being a bit bent too
They gave her a refund for them, but she's asked if I can solder them back together, so its another job for me to do, when I get round to having a play...