steel specification

What is correct specification of steel for boatbuilding, i.e inland waterway barge.

 

For that I need to know what type of steel it is, then I can give you the specification.
But for your info, the most common steel used in shipbuilding is: Grade A

Chemical composition:
Carbon 0.21% max.
Manganese 2.5XC% min.
Silicon 0.5% max.
Sulphur 0.035% max.
Phosphorus 0.035% max.
Carbon and 1/6 of Manganese content is not to exceed 0.4%

Mechanical properties:
Yield 235 N/mm^2 min.
Tensile 400-520 N/mm^2
Elongation 22% min.

Hope this helps.

 

Michael,

You might get a few blank stares if you mention shipbuilding Grade 'A' steel, especially for inland waterway (narrowboat?) specifications.

Stockists usually respond better to the old (defunct) BS 4360 specification, grade 43A which I seem to recall as being the equivalent of grade 'A', or a little better. The "new" standard is BS EN 10025: 1993 grade S275.

However, recommend you make your own enquiries with a local steel stockist. No point in recommending all sorts of specifications if it is not available in your area.

 

may i know the complete details of steel boat engine and fixing ....

 

Dutch Peter is right, grade A would be best, but is slightly more expensive than what i might propose: if it's a regular barge for inland waters use steel commercial quality tensile strength between 37 and 42 also callesd ST 37 - ST 42.