FABRICATION PROCESS
Fabrication of stainless steel reinforcing bars uses the same processes as for uncoated carbon reinforcing steel bars. However, contamination of SSR with black carbon can affect product performance.
For this reason, the industry in concert with the CRSI has developed an ANSI standard to eliminate the possibility of iron contamination of the SSR during the various fabrication processes. The ANSI CRSI IPG4.1 document is titled “Standard Practice for Stainless Steel Reinforcing Bar Fabrication Facilities”.
The primary provisions of the Standard are as follows :
the establishment of key criteria regarding the acceptance and rejection of material throughout the fabrication process,
to avoid contamination, SSR is to be fabricated in a segregated and dedicated facility unless adequate cleaning or contamination isolation procedures are in use, and
all contact points of tools, machinery and equipment used during storage, fabrication, handling or shipping will be with materials that do not impart
any carbon steel contamination to the stainless product,
nor have they been previously used on
carbon steel,
low alloy steel,
low carbon chromium steel, or
other non-stainless ferritic materials.