 Shipbuilding
 Where can
you get superior ABS shafts and gear blanks, pintle pins, couplings,
and more…in a variety of shapes, sizes,
and grades?
What should you do when a ship is in drydock and
you need forgings in short lead times to put that ship back
to work?
Who can you turn to for high-strength forgings with
ABS, DNV, BV, and Lloyd's approval and on-time delivery?
Just place a call to Scot Forge!
The Benefits of Working with Scot Forge
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Forged Parts for the Shipbuilding Industry
- ABS shafts: propeller,
tail, rudder stock, torque, line, drive,
intermediate, main,
controllable pitch,
variable pitch, stub,
input, upper vertical,
lower vertical
- Pintle pins, keystock
- Hollows/marine
tubing: strut barrel,
stern tube, rudder
tube, shaft couplings
- ABS gear blanks,
marine winch
components, engine
mounting rings
- Torch cut shapes:
tiller arms, strut
assembly parts
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A Vast Inventory
Scot Forge maintains a ready inventory of carbon, alloy,
stainless, and copper based material. We also produce parts
in nitronic, super
duplex,
and super austenitic grades including Ferralium® 225,
Hiduron® 191, and 254 SMO®.
Breakdown Service
Our planning system allows for daily scheduled-in time for
immediate produc-tionof breakdown and emergency orders.
ABS, DNV, BV and Lloyds Registry
Approved
Scot Forge meets these strict standards and can perform
in-house ABS certification within 1 hour, with no separate
ABS billing required.
 Flexible
Sizes, Shapes, and Quantities
Fast Quotes and Personalized Services
Our knowledgeable sales staff provides fast quotes—sometimes
right over the phone—and personalized, one-on-one service.
Value Added Options from One Source
Whether you need your parts “as forged,” rough
machined, heat treated, tested, or all of the above, Scot
Forge provides single source responsibility—so you
can prevent the delays and quality problems that arise with
multiple suppliers.
The Advantages of Forged Marine Parts
Directional Grain Flow and Sound Centers
Forgings' continuous grain flow and sound centers ensure
much greater impact strength compared to rolled bar or weldments.
Superior Fatigue Resistance
Forged parts last longer in the field—which saves repair
costs and lost revenues. Our Franklin Park, IL hammer shop
offers standard open die rings, blanks, and hubs in 1 week—guaranteed!
Near Net Shapes
Our forging process produces parts with multiple-diameter,
flanged and complex configuration shapes. This results in
superior strength throughout parts, eliminating the need for
stress-prone welds, excess machining, and frequent repairs.
Case Study: Forged Part Puts Boat "Back in Shipshape"
Scot Forge Replaces Two-Part Weldment with a Single High-Strength Forging
Scot Forge recently came to the rescue when an offshore supply
boat needed to replace a
failed torque shaft. The failed shaft was a weldment with
a finish size of 12 1 /2" O.D. x 3 1 /2" long, stepped
to 4 5 /16" O.D. x 156" long. It had been produced
by welding a ring, torch cut from plate, to a hot rolled bar.
This process then involved sending the welded shaft out for
stress relieving, after which it would be finish machined and
installed on the boat.
Troubled Waters:
Installation Delays Followed by Field Failure
Problems began with stress relieving delays. Because there
was no in-state supplier available to provide stress relieving
services on parts this long, it was necessary to ship the
weldment out of state. Shipping and processing took two weeks,
which delayed installation and increased downtime costs.
Yet the problems were just beginning. The shaft only lasted
8 months in the field before cracks developed at the weld
location, causing the shaft to be condemned. The failure of
the weld was so great that the flange could literally be spun
off the bar.
A replacement for the shaft was needed quickly, but it was
clear that the part should not be produced by the same process
as before.
Navigating a Better Route:
Switching to the Forging Process
Scot Forge, a leader in shipbuilding forging solutions, offered
a higher-strength part in a shorter lead time. They produced
the part as a single forg-ing, with the step as an integral
part of the shaft.
This solution proved far superior to the production of another
weldment in several ways. First, the forging of a single component
resulted in a much more structurally sound shaft. The continuous
directional grain flow produced by forging yields far greater
impact strength and fatigue resistance, preventing field failure.
Second, the simplified production requirements of a single
shaft component shortened the lead time and eliminated multi-sourcing.
This component reduction solution also eliminated the costs
of welding and stress relieving.
Finally, switching to forging created a part with a much longer
in-service life, reducing subsequent labor, repair, and replacement
costs.
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 A
copy of Forging Solutions for Shipbuilding from Scot
Forge is available
in pdf format. To view pdfs, you will need Acrobat
Reader. Download a free copy if needed. |
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