Yes, for 30 years the customer had a "material substitution" document that allowed the substitution of -T351 en lieu of -T4. A couple years ago they removed the substitution with the comment "property discrepancies".
I have looked at the standard properties. I am not sure about stress corrosion, exfoliation corrosion, or some fatigue differences. For 30 years it was acceptable and now -t351 for -t4 is not allowed citing property discrepancies???
My customer has removed 2024-t351 per qq-a-225/6 as an alternative temper to 2024-t4 citing only "property discrepancies". Does anyone know what the discrepancies are?
These are serrations similar to spline teeth. They are not designed for dynamic operation such as spur, bevel, or worm gears. They operate in static ie to prevent rotation or sliding action with a mating part. They are often used in parts that have slots for fastener holes and fix to a mating...
The serrations I am dealing with are on the ends of a shaft with the tooth direction running perpendicular to the axis of the shaft in much the same way if the ends were threaded. There is a callout on the drawing requiring the pitch planes to be coincident within .002 tir. I am having a hard...
Has anyone used Catia V5R16 and Adobe 3D to create 3d screen captures that can be made into a .pdf adn can be viewed (rotated) by others with a adobe reader? I am having problems with Catia V5 crashing when I do a capture.
Is the thread pitch line the functional feature for mating surfaces of threads on a bolt and nut? Is this where contact exists? Also, am I correct when the tendencey for a thread to back off is releted to pitch(or lead in a single thread)? Sounds basic, but I am a Material Science Engineer...
I have a 1.3713/1.3724 dia. pin with a .875 dia. hole thru it. The material is 15-5 heat treat 180/200 ksi (HRC40-43). The part is to be shot peened with shot # 170-330, intensity=.016A2, coverage=200%. How much dimensional change on the dia. may I expect?
If I am machining a part made from a casting and the drawing indicates a critically stressed area then I might observe caution? Is the critically stressed area do to un-equal cooling rates?
From what I understand, a liner locates removable pins etc. in the fixture to hold assemblies in the correct location. In my application, it has to be a close tolerance wear resistant bushing to improve life of the fixture. The drill bushing guides the drill in the machining operation. The...
