AN Fittings Allowable

[JayCarp]

I am in industry and am proposing use of AN fittings

in one of our applications. My question is what is the

maximum working pressure for 7075 " W " versus 2024

" D " material. The particular fitting size is - 4 ,

1 / 4 "

 

[rb1957]

"W" ??? ... isn't W a very reduced strength condition for forming puropses ? If i'm right, nobody would use W material (without heat-treating it to say T6 or T73).

also what sort of AN fitting ? ... an AN-4 is a bolt; we'll need to know which AN fitting you're considering.

 

[monkeydog]

AN960 should work fine.

 

[rb1957]

if you wanted a washer

 

[ewh]

 

[WKTaylor]

Jaycarp...

You have to identify the fitting(s) You want to used based on configuration [elbows, tees, sizes, etc]... then trace it back to the procurement spec for operating limits. Or have a company document that specifices working pressure loads... and any other loads present [bending, shear, vibration, abuse, etc]

NOTE: W = 7075-T73 die forging, D = 2014-T6 die forging

In MANY instances, the D material parts are hard to find! The D material is not readily avaialble due to minimal use. The W material is slightly stronger/tougher and has better corrosion & SCC resistance; and is a very commonly forged material.

Regards, Wil Taylor

 

[MikeHalloran]

In 'industry', where hammers are primary maintenance tools, I'd be inclined to use steel 'AN' fittings, not aluminum.



Mike Halloran
Pembroke Pines, FL, USA