Materials in ShipBuilding

[persianmj]

Greetings ...


i wanted to know what are the best materials that are used in shipbuilding and why
thanks a lot indeed!

[gonzo]

The answer is: "it depends". You have to specify what the ship is for, where it will be used, work life expectancy, etc. All these specifications will end up telling you what materials are the best or cheaper for the job.

[persianmj]

Originally Posted by gonzo

You have to specify what the ship is for, where it will be used, work life expectancy, etc.

(bulk carrier, container ship, multipurpose, tankers, LNG ...) = ?
naval ship = ?

where it will be used : oceans.
work of life expectancy : NA

by the way, thanks a lot for you reply, i thought after 36 views and no reply for this post, no one will ever reply back

Shane.

[gonzo]

You need to specify which is itbulk carrier, container ship, multipurpose, tankers, LNG . etc. Also which ocean and on what seasons. Life expectancy is crucial to the specifications.

Don´t get impatient!

It is Christmas in our civilized parts of the world!

There will come some more replies up, be sure.

Richard

[Herman]

Come on, Richard. No Christmas in your place either.

Anyhow, for structures upwards of some 20 meters, steel is the most common material. Especially for commercial vessels.

Life expectancy: Most commercial vessels are rated for 30 years.

[micspoko]

Steel is the best material for commercial vessels because is cheaper in building and of course what would later be very important when using the ship is cheaper in repair. Almost all units are constructed of steel and aluminum are used for example for high-speed passenger ferries, or to build a superstructures to lower center of gravity.

Originally Posted by Herman

Come on, Richard. No Christmas in your place either.

Anyhow, for structures upwards of some 20 meters, steel is the most common material. Especially for commercial vessels.

Life expectancy: Most commercial vessels are rated for 30 years.

How did you know I was in Sri Lanka?

Anyway, steal is the cheapest ...
You must agree.

Richard

[Landlubber]

persianmj,

...observation reveals that basically there is only one material used in shipbuilding now for a century, why, it is cheap to build, minimum qualifications and repairable in every port of the world. Aluminium alloys are only used in high speed craft commercially as of course the weight is a major factor.

Steel has the strength, the resilience and the availability to be used everywhere.

[Herman]

And steel can be welded in all but the most bizarre circumstances.

So we have:

-cheap
-easy to use
-easy to store
-strong
-resilient
-can be recycled
-available everywhere
-no compatibility issues
-long lifespan with minimal protection
-virtually endless life expectancy if well protected
-can be rolled and forged into bizarre shapes if needed

It is heavy, however, which is why smaller boats are made from more lightweight materials. (aluminium, polyester, wood)

[meera]

In general steel is used for hull( mild steel and high tensile steel).
for superstructures aluminium is used .
brass or bronze is used for propellor, iron for rudder.
pvc and different fibers are used for lifeboats.......
*in detail it depends upon wt kind of ship it is, in which sea it travels,...