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Properties after Heat Treatment; wall thicknesses

Properties after Heat Treatment; wall thicknesses

Properties after Heat Treatment; wall thicknesses

(OP)
Hi all,

Reference page 2-18 in MIL-5H and MMPDS, Table 2.3.1.0(c2.  

Properties for MIL-T-6736 in the first two columns are different, but the wall thkns is the same; is this a typo?  

Also the third column has higher properties for 'all walls'.  I am a stress analyst and not a metallurgist, but I thought that, in general, properties could be expected to diminish with increasing thickness.  Does 'all walls' mean walls of any thickness? I would appreciate some help in understanding this data more clearly.

Thanks and regards.

RE: Properties after Heat Treatment; wall thicknesses

Lcubed,

The SAE standards are based on minimum mechanical properties:

AMS 6361 = 125 ksi
AMS 6362 = 150 ksi
AMS-T-6736 = 180 ksi

There is no metallurgical anomaly.

RE: Properties after Heat Treatment; wall thicknesses

(OP)
Thanks TVP,
Can you explain the term 'all walls' to me?  Does this mean any thickness?

Thanks

Lcubed

RE: Properties after Heat Treatment; wall thicknesses

Yes, this is supposed to be any thickness.

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