I'm looking for a US equivalent of the above for spec'ing purposes, but it doesn't seem to exist. Some places give ASTM A487 Grade 6 as an equivalent but there are a number of problems with that:
The ASTM grade has a lower yield (655 compared to 700 MPa)
The ASTM grade has a huge permissible variation in Carbon content (0.05-0.38 compared to 0.17-0.22%)
The ASTM spec is cast steel for pressure vessel components whereas this application is for truck suspension components, e.g a knuckle.
On this basis I don't see ASTM 487 Grade 6 being equivalent, but I don't know what is. Anyone got an idea of an equivalent, or alternatively knows a good high-strength US cast steel spec with good fatigue properties for a heavy offroad truck?
The ASTM grade has a lower yield (655 compared to 700 MPa)
The ASTM grade has a huge permissible variation in Carbon content (0.05-0.38 compared to 0.17-0.22%)
The ASTM spec is cast steel for pressure vessel components whereas this application is for truck suspension components, e.g a knuckle.
On this basis I don't see ASTM 487 Grade 6 being equivalent, but I don't know what is. Anyone got an idea of an equivalent, or alternatively knows a good high-strength US cast steel spec with good fatigue properties for a heavy offroad truck?
