Semi-finished steel products
|Publication Date:||1 May 2016|
Scope and application
This programme is applicable for the approval of material manufacturers of:
Steel making and semi-finished products,
as referred in the Society's rules and standards. For a description of general requirements, conditions and procedures related to the approval, please refer to DNVGL CP 0346 which shall be applied in combination with this programme.
The programme covers the process of manufacturing liquid steel, cast semi-finished products (i.e. concast slab, ingot etc.) and partially hot-worked semi-finished products ( i.e. blooms, bars etc.)
Approval is required for:
each steel grade (VL A, VL E36 etc.) or steel type (C and C-Mn, alloy, stainless etc.),
each product type (ingots, slabs, blooms, billets etc., and
dimension/weight of semi-finished products (weight for ingots and dimensions for continuously cast products).
The product(s) used for approval testing (see Sec.3) will place limitations on the range of approval.
Approval will be limited to each steel grade, product type and processing route (steel making process, casting method etc.) used to produce approval test samples.
Approval for one grade of steel may also cover approval of lower strength or toughness grades without approval testing but based on approval principles as described in App.A. The following parameters are typical manufacturing variables in processing route:
steelmaking process (BOC, EAF etc.) and secondary refining (LF, VD, VAD or VOD etc.)
casting method (CC or IC)
When relevant approval may be given for steel grades according to relevant international standards for which test scope shall be agreed with the Society on a case by case basis.