Steel is be far and away the commonest material used in the construction of narrow boats. A classification system using a series of numbers and letters is used to differentiate different types of steel used on narrowboats.
Steel Specification… What Does It Mean?
Standard steel certification is currently to EN 10025
A classification system using a series of numbers and letters is used to differentiate different types of steel used to construct a narrowboat hull. If you are contemplating building a shell, speak to your local steel stockholder.
But what do the letters and numbers mean?
A common steel maybe classified under EN 10025 as being S 275JR
This is uncoded as:
S – Structural Steel
275 – A minimum yield strength (Reh) which measures stress loads as the material transitions from plastic to elastic
JR – relates to figures obtained from a Charpy v notch impact test
And that is why it is probably better left to your chosen experts to advise you on what is best for your project!
Typical steel thicknesses are:
10mm base plate
6mm hull sides
5mm cabin side
Therefore a narrow boat built with same would be classified as being 10,6,5,4.
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