SHIPCON

SHIPBUILDING MATERIALS

STEEL ARE ALLOYS OF IRON, WITH

PROPERTIES DEPENDENT UPON THE TYPE

AND AMOUNTS OF ALLOYING MATERIALS

USED.

THE SPECIFICATIONS OF SHIP BUILDING

STEELS ARE LAID DOWN BY

CLASSIFICATION SOCIETIES.

SHIPBUILDING STEELS ARE TESTED

AND GRADED BY CLASSIFICATION

SOCIETY SURVEYORS WHO STAMP IT

WITH APPROVAL MARKS

MILD STEEL ARE GRADED “A” TO “E” IS

USED FOR MOST PARTS OF THE SHIP

HIGHER TENSILE STEELS MAY BE USED IN

AREAS OF HIGH STRESS, SUCH AS THE

SHEER STRAKE

THE USE OF HIGHER TENSILE STEEL IN

PLACE OF MILD STEEL RESULTS IN SAVING

OF WEIGHT FOR THE SAME STRENGTH

TENSILE STRENGTH

DUCTILITY

HARDNESS

TOUGHNESS

DEFINITION

SHIPS SIX DEGREE OF FREEDOMhttp://

www.youtube.com/watch?v=nvh2hCxUvJA&feature=player_detailpage

SHIP SAGGING

SHIP SAGGING

SHIP HOGGING

STRAIN IS EXTENSION DIVIDED BY

ORIGINAL STRENGTH

YIELD POINT

ULTIMATE TENSILE STRESS

MODULUS OF ELASTICITY

DEFINITIONS

TOUGHNESS IS RELATED TO BRITTLE

FRACTURE

BRITTLE FRACTURE MAYBE INITIATED BY A

SMALL CRACK OR NOTCH IN A PLACE

COLD CONDITIONS INCREASES THE

CHANGES OF BRITTLE FRACTURE

MILD STEEL IS UNSUITABLE FOR THE VERY

LOW TEMPERATURES INVOLVED IN THE

CONTAINTMENT OF LIQUEFIED GASSES

FORGING..... USED IN SHIPBUILDING

STRENGTH OF ALUMINUM IN

SUPERSTRUCTURES IS PRESERVED IN THE

EVENT OF FIRE

SPECIAL PRECAUTIONS NEEDED AGAINST

CORROSION WHEN ALUMINUM ALLOY IS

CONNECTED TO STEEL WORK

STUDENTS SHOULD IDENTIFY, DESCRIBE

AND EXPLAIN THE DIFFERENT

SHIPBUILDING MATERIALS

ACTIVITY

SURVEY AND DRYDOCKING

CAR TO THEIR STRENGTHGO SHIPS

REQUIRE ADDITIONAL BULKHEADS AS

LAID DOWN BY CLASSIFICATION SOCIETY

RULES ACCORDING TO THEIR STRENGTH

BULKHEADS