4140 or better
4140 or better
(OP)
Hello! I have been tasked with sourcing material for a new order. It will be tested to 15000psi and 25000psi I believe. Currently the material is 4140, however the customer would like the product to be lighter. Outside of machining extra material away is there any material out there that would make the part lighter but not compromise any strength or ever better? The "leeway" on material is a 10-20% greater cost.
thank you
thank you





RE: 4140 or better
What are you making? What properties do you require from the 4140 material?
You obviously have to change the design of the part to make it lighter. I think you are asking how can you change the design to make it lighter. We can't tell you anything if we don't know what the design is.
rp
RE: 4140 or better
RE: 4140 or better
RE: 4140 or better
If Flanged, have you thought about making it Dbl. Studded, with spool adapters where needed?
Is the valve body cast or forged?
If forged, is it block or shaped?
Many more questions could follow.
RE: 4140 or better
Development and Standardization (MMPDS) manual says these can substitute for 4140. You can get a free download here: http://www.everyspec.com/FAA/FAA-General/DOT-FAA-A...
RE: 4140 or better
RE: 4140 or better
Petrotrim Services
www.petrotrim.com
RE: 4140 or better
Heat treat it.
make it thicker.
OK there's another, make from it from higher strength steel then have it heat treated & make it thinner.
but like the other senior members said, be sure to have it calculated & tested carefully.
be sure to have the correct safety factor.
Mfgenggear
if it can be built it can be calculated.
if it can be calculated it can be built.
RE: 4140 or better
Just about any "solution" will likely need to be equally radical and potentially economically unfeasible unless the valve is being used in some exotic application.
RE: 4140 or better
rp
RE: 4140 or better
lk
RE: 4140 or better
I don't know of a standard threaded connection suitable for 15K or 20K pressures. Maybe one of the premium tubing threads from VAM or someone like that. What code are you working to? I would think that API 6A might be applicable? If so, that limits your material choices dramatically.
RE: 4140 or better