H11 Tool Steel vs Inconel 718
H11 Tool Steel vs Inconel 718
(OP)
A general curiosity, really, but corrosion resistance aside, what are some reasons one may choose to make a component out of Inco 718 over H11 tool steel when looking for a high-strength alloy for service below 750F? Machinability? Cost? Availability? Weldability? Fatigue resistance?
I was looking at a design for a satellite component the other day made from Inco 718, and I was thinking to myself that there are probably less expensive material choices out there that would perform better (esp. absent of air). I'm pretty sure the operating temperature was well below 750F, which is where I'd usually start thinking about a high-temperature alloy. Comments?
I was looking at a design for a satellite component the other day made from Inco 718, and I was thinking to myself that there are probably less expensive material choices out there that would perform better (esp. absent of air). I'm pretty sure the operating temperature was well below 750F, which is where I'd usually start thinking about a high-temperature alloy. Comments?





RE: H11 Tool Steel vs Inconel 718
H11 is a straight hot working tool steel,there can be no similarity in my opinion
RE: H11 Tool Steel vs Inconel 718
It seems as though H11 (or other high-strength steels) would be a better material choice than high-strength, nickel-based alloys in these sort of situations. Comments?
RE: H11 Tool Steel vs Inconel 718
You can do this on your own - Google the two materials and look for elevated temperature tensile properties.
RE: H11 Tool Steel vs Inconel 718
RE: H11 Tool Steel vs Inconel 718
RE: H11 Tool Steel vs Inconel 718
If I had to pick one my guess is that it is the magnetic permeability which made it required for a satelite component. This is why 718 is used in other position sensitive devices (such as drill collars). The alternative may not have been H11 but a titanium alloy.
As a rule of thumb - no one designs in a superalloy unless they absolutely have no other option.