- Thread starter johnny99
- Start date
Being a machining grade 303 is typically only available as bar anyway. For the pipework 321 is one of the better grades for turbo applications, well at least until you price the stuff! Because 321 is relatively hard to find and spendy most people use 304L or 316L on the grounds that it's available everywhere and increase the wall thickness (sch 10 or thicker pipe instead of 1.5mm wall tube) to compensate as 304/316 aren't as 'good' at turbo manifold operating temps- intermittant max service temps/creep strength etc. The heavy wall pipe bend approach works fine with mild steel too.
Thin wall tube can be made to work if enough thought is put into supporting the turbo in a way which allows things to move for expansion/contraction as it's heat cycled. There's not much margin for error in that it's extremely common for cracks to grow from the smallest of welding flaws though.
Thin wall tube can be made to work if enough thought is put into supporting the turbo in a way which allows things to move for expansion/contraction as it's heat cycled. There's not much margin for error in that it's extremely common for cracks to grow from the smallest of welding flaws though.
Lawnmowerboy
Member
- Messages
- 2,165
Also free machining material often is leaded and with added sulphur which is why it can present problems when you want to weld it.
Brazes nicely though.
Brazes nicely though.
