MATERIAL INSPECTION
MATERIAL INSPECTION :
Carbon {c} : Strength / hardness.
Manganese {Mn} : Toughness.
Silicon {Si} : <0.3% deoxidizer [avoid porosity].
Chromium {cr} : corrosion resistance.
Molybdenum {Mo} : 1% is for creep resistance.
Nickel {Ni} : low temp application.
Titanium {Ti} : used to avoid weld decay.
Niobium {Nb} : used to avoid weld decay.
One of the duties of the visual/ welding inspector is materials inspection & there are a number of situations where this will be required.
- at the plate [or] pipe mill.
- during fabrication of construction
- after installation of material, usually during a planned maintenance program, outage or shut down.
- all of the above.
There are three essential aspects to material inspection that the inspector should consider.
- material type & weld ability.
- material trace ability.
- material condition & dimensions.
- all of the above.