Zink steel
I have two questions regarding sink coated steel
First does the hot zinc coating on steel interfere with the jaws on a shrinker stretcher machine Second is it recommended to use zinc steel for auto restoration? Thanx Mick |
To answer your second question, you have to clean the zinc off to weld it, and the fumes are poisonous. Personally I would not use it.
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I have been using it for the last 10 years. I only just started to think maybe I shouldn’t.
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Zinc
Zinc will plug up your shrinker jaws, and is slippery and will cause them to slip as well.
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By welding or brazing zinc sheets, the temperature can rise enough to vaporize the zinc and if you breathe it , can give you "zinc chills."
Welding galvanized steel can also give you zinc chills if you do not wear proper protective gear. Soldering, riveting and bolting zinc clad sheets recommended. |
i have been looking at the steel sheets as well Mick.
the GT40 i want to build calls for the use of EN2B sheets, which is an old english standard. comprising carbon 0.15 max Manganise 0.50m Sulfur 0.05 Phosphorus 0.05 i am not sure what sort of sheets you can get in South Australia, but i havent found any EN2B in Melbourne. i have been going through the bluescope steel site. http://steelproducts.bluescopesteel....ary/datasheets I haven't got much past that at the moment. Since this will be forming the monocoque chassis, i am considering the cold rolled CM350-G, which as a 350MPA strength. My only concern is if i will be able to form it easily. Ryan |
As a beginner, maybe someone else here could suggest a steel that would be easy to form and why.
i have been trying to understand the importance of the different alloys compositions https://www.google.com/url?sa=t&rct=...htaPYBaotLjYY0 sounds like Carbon and Manganese in higher % make for a better steel, Sulfur in a high % is worse Phosphorus may provide some extra corrosion protection but in general is undesirable. |
I've seen aluminum killed steel used or cited by many in the metalshaping community as easily formable. I've used it in a seminar I took last year. AKDQ - aluminum killed drawing quality. I believe the astm code is ASTM A 1008 DS, type B. It's tough to find at most metal suppliers. Or if they even have it available they require you to order a whole pallet. Here's an article on it https://www.sciencedirect.com/topics...m-killed-steel
What I've ended up finding local to me and buying is ASTM A 1008 type A or type B which I guess is what people usually refer to just as cold rolled steel. |
I'm curious about manganese content. Does its physical properties change when alloyed in certain combinations, can it can be annealed., ??
I understood manganese quickly work-hardens under impact conditions to become very strong and resilient. certain stone-related equipment applications employ this behavior. Large pestles and cones in crushing equipment are often plated with manganese to extend machine life. For structural bends, this might provide a strength benefit. But such properties would seem to be undesireable in a complex metalshaping application. |
The Manganese quantity also intrigues me as well.
the En2b is still a low carbon content steel alloy, so exhibits most of the qualities of a "Mild Steel" at a guess. will have to dive into the materials books. Ryan |
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