Well, at last my CM mast arrived (just in time for the first winter snow
that will probably postpone installation until spring).
I have never purchased one of these wonderous products before and it came
with a signed and sealed Material Test Report that tells me all sorts of
wonderful things, perhaps 5% of which I understand.
Perhaps there is a bored materials engineer out there that can deciper some
of this for me:
Heat Number: 956741
Grade: 4130
Dimensions: 2" OD, 1.25" ID (Wall 0.375")
ASTM Spec: A519
Description: SMLS * CD * ALLOY STEEL TUBE
Chemical Analysis:
C: 0.29
Mn: 0.44
P: 0.015
S: 0.003
Si: 0.24
Cu: 0.21
Ni: 0.12
Cr: 0.97
Mo: 0.018
Al: 0.026
Ca: 0.002
Yield Strength: (PSI) 125,700
Tensile Strength: (PSI) 143,000
Elongation: % in 2" 32.5
ROA: 57.3
Hardness: (BHN) 321
What say you, engineers? Is this the wonderful stuff that multiple
Towertalk threads have been devoted to?! :)
73, Dick
--
Dick Flanagan W6OLD CFII Minden, Nevada DM09 (South of Reno)
Visit http://www.qsl.net/w7di/
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