Hi Jorge,
It's easier to stick to a 2" OD. I went with 2" OD but with a 3/8" wall 4130
chromoly. The cost difference between 1/4" and 3/8" is not significant. I
want to make sure the mast outlasts me! Attached below are the details of my
mast and the cost. I had to pay another vender to galvanize it for me for an
additional $150. So a total cost of $650. Not cheap but when you look a the
big picture it's cheap insurance. Using the windload calculator this mast is
good for 135mph for my two yagis. We do get 120mph winds here once in a
decade. GL and 73.
CERTIFICATE OF TEST
for reference only 6050 DOWNING STREET
13-Sep-2012 DENVER
Quote No: 695993 CO 80216
Description: 4130 CDS TUBING SR, ASTM A 519
2.000 OD X .375 W S/C 15'0" ( 180.0")
Heat: 001M59442 Item: 100549
Specifications:
ASTM A 519 06
-----------------------------------------------------------
CHEMICAL ANALYSIS
-----------------------------------------------------------
C MN P S SI NI CR MO
0.29 0.55 0.009 0.016 0.22 0.13 1.01 0.16
CU AL
0.23 0.02
-----------------------------------------------------------
RCPT: R733705
VENDOR: MICHIGAN SEAMLESS TUBE COUNTRY OF ORIGIN : USA
----------------------------------------------------------------
MECHANICAL PROPERTIES
----------------------------------------------------------------
YLD STR ULT TEN %ELONG %RED HARDNESS
DESCRIPTION PSI PSI IN 2 IN IN AREA BHN
104628.0 122695.0 18.7 101
----------------------------------------------------------------
EDDY CURRENT: OK
------------------------------------------------------------
------------------------------------------------------------
ITEM#: 100549
CUST. PART NO:
PO NO:
DATE/TYPE: 9/21/2012 (DELIVERY DATE)
DESCRIPTION: 1 PC-15 FT
4130 CDS TUBING SR, ASTM A 519
2.000 OD X .375 W S/C 15'0" ( 180.0")
ORD. QTY.: 1
UOM: EA
UNIT PRICE: $480.00
EXT. PRICE: $480.00
OTHER: CUTTING SAW
TOLERANCE: +1/8 -0
SHIP VIA: OUR TRUCK
Ship Weight: 98 LB
----------
Total Ship Weight For The Order: 98 LB
TOTAL: $480.00
Sales Tax: $31.19
Grand Total: $511.19
====================
Best Regards,
Jonathan Woo
(970) 646-1711
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