Hey all
I am after some correct grade steel to make some 3/4"
Does anyone know a supplier
Whoever is doing boiler rivetting must know
Regards
Marc
Australian Code of Practice for Locomotive Boilers (Version1.01 16 June 2011), the Appendix R gives the following details for rivet material.
Carbon, not more than 0.20%
Manganese, not less than 0.40%
Sulphur, not more than 0.05%
Phosphorus, not more than 0.05%
Elongation, not less than 25%
UTS, 400MPa to 460MPa
Yield strength, 50% of the tensile strength.
The appendix also offers the following comments:-
That the material be sufficiently ductile to allow the rivet head to be formed and the shank deformed to fill the hole without cracks forming in the rivet.
That many modern steels are cold worked, and although they may have the correct chemical composition, they will not comply with the mechanical properties.
All this means that the 1020 bar the steel merchant wants to sell you is almost certainly cold-worked and will not pass any of the usual mechanical tests that rivet bar should pass. This includes the 180* bend test whereby the cold rivet bar is bent hard back on itself without cracking on the outside of the bend.