Reply
 
Thread Tools Search this Thread
 
Old 26 February 2008, 10:02   #21
Member
 
Country: UK - England
Town: Over here
Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
Join Date: Nov 2003
Posts: 2,115
JW ? Don't weld Galv materials without removing the Galv..inside and out..or at least use the best fume extraction you can... the fumes are not good stuff..as well as not being good for your weld! Weld with standard Carbon steel consumable.
__________________

__________________
Jono is offline   Reply With Quote
Old 26 February 2008, 10:25   #22
Member
 
Country: Other
Town: San Carlos, Mexico
Boat name: INDE
Make: LOMAC 730
Length: 7m +
Engine: 200 Merc.
MMSI: Please press 1
Join Date: May 2006
Posts: 1,688
Send a message via Skype™ to Limey Linda
I discovered somethig yesterday that may be relevant. My trailer is made of low carbon steel, during the hot dip galv. process the steel hardened because it took me an hour to drill two holes in it. If your trailer is the same and it came already bent then they used heat to do it and maybe annealed the steel at that point and made it soft. So if you weld the repair you will anneal it further. I would replace or strighten it and use U bolts to splice a reinforcing section in.
Just an idea.
__________________

__________________
Running around like a head with it's chicken cut off.
Limey Linda is offline   Reply With Quote
Old 26 February 2008, 11:09   #23
Member
 
Country: UK - England
Town: Over here
Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
Join Date: Nov 2003
Posts: 2,115
Quote:
Originally Posted by Limey Linda View Post
..... My trailer is made of low carbon steel, during the hot dip galv. process the steel hardened ......
.................. I'm being a bit of a numpty here, but I don't grasp how the temp of Galv process hardens the steel..or have I got my temps all wrong?
__________________
Jono is offline   Reply With Quote
Old 26 February 2008, 11:15   #24
Member
 
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,688
That really doesn't look like a very strong bit of steel for a trailer drawbar, being a long single length without any support.
__________________
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...

Sent from my Computer, using a keyboard and mouse
BogMonster is offline   Reply With Quote
Old 26 February 2008, 11:19   #25
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
Quote:
Originally Posted by Jono View Post
JW ? Don't weld Galv materials ... the fumes are not good stuff....
I know. I've had the lurgy more than once. But it is worth using stainless wire where you're gonna dip it into the sea or where you don't want your weld area to corrode. Try it.
__________________
JW.
jwalker is offline   Reply With Quote
Old 26 February 2008, 11:19   #26
Member
 
Country: Other
Town: San Carlos, Mexico
Boat name: INDE
Make: LOMAC 730
Length: 7m +
Engine: 200 Merc.
MMSI: Please press 1
Join Date: May 2006
Posts: 1,688
Send a message via Skype™ to Limey Linda
Quote:
Originally Posted by Jono View Post
.................. I'm being a bit of a numpty here, but I don't grasp how the temp of Galv process hardens the steel..or have I got my temps all wrong?
Temp. of process is 460 C. maybe enough to case harden. It is only a guess as I could not think of another reason, unless the steel was hardened in the first place. It is HARD.
__________________
Running around like a head with it's chicken cut off.
Limey Linda is offline   Reply With Quote
Old 26 February 2008, 11:25   #27
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
Torkin about carbon steels, I got a slice of EN8 last week to make a crankshaft pulley. It was the end of a bar. Fekk me it was grumpy stuff. I put it inside the wood burner then left it to cool overnight.... tough but smooth.
__________________
JW.
jwalker is offline   Reply With Quote
Old 26 February 2008, 11:27   #28
Member
 
Country: UK - England
Town: Bristol
Make: Ribcraft
Length: 5m +
Engine: Yamaha
Join Date: May 2006
Posts: 4,194
what about re balancing the boat so that there is less weight on the drawbar end,
__________________
matt h is offline   Reply With Quote
Old 26 February 2008, 11:38   #29
Member
 
Country: UK - England
Town: Over here
Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
Join Date: Nov 2003
Posts: 2,115
Jeff...Me thinks I'd be more concerned about embrittlement of the S/S weld metal than it's benefits to "corrosion protection".. but I do like the "Grumpy stuff" reference for your and may try it in a meeting with the boys flying in to discuss making a job from a material that I don't like... Yeah "Grumpy Stuff".. I like it!

Limey...Could be a duff/cheap batch of drills?
__________________
Jono is offline   Reply With Quote
Old 26 February 2008, 11:43   #30
Member
 
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
I saw Hightowers boat being moved on and off the trailer yesterday. To me it seemd like the bit that was bending was actually flexing as the boat was winched on to the trailer. It just hasn't bent then stayed in one place. Its a bit like Uri Geller has been playing with it.
__________________

__________________
http://www.xfire.com/download/
Biggles is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 20:36.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.