Raw material (Coils, Bars, Flats) received from suppliers are checked at the Incoming stage against the following parameters.:
All the tested properties are matched with purchase specification and the RM TC of supplier and are then color coded if accepted. Material Is procured from only Primary sources such as JSW, JSPL, Bhushan Steel, Usha Martin, Jayswal Neco, RINL, Vizag, Upper India etc.
After incoming inspection the raw material is annealed in bell type completely automatic Plc based spherodized-annealing furnace in controlled atmosphere.
Every grade runs on set Time cycles and every lot is there after inspected for Decarburization.
From here onwards, Material undergoes acid pickling followed by Phosphating.
Drawing is done maintain draw size, eliminate any kind of ovality.
Cold forging is performed on following machines:
The in-process inspection (As per sampling plan) is carried out at regular intervals after clearing the first off inspection.
All parameters are checked as per standard and the job card.
Hot forging operation is performed in following steps:
The in-process inspection (As per sampling plan) is carried out at regular intervals after clearing the first off inspection.
All parameters are checked as per standard and the job card.
The hardening and tempering process is carried out in fully automatic Continuous heat treatment Plants with logic control.
Hardening and tempering temperature and time is set as as Per raw material used, property class and size of the bolt and washer. All the material is oil quenched.
Complete process is continuously monitored with live scanner software with complete temp. Time graph availability.
The surface finishing of the material is done as per customer requirement:
The following parameters are checked in a coating:
Hot Dip Galvanizing, Electro-galvanizing (Cr3- White, yellow, Green, Black Passivation), PTFE Coating, Zinc-Al Flake Coating (Geomet, Dacromet), Zinc Phosphate and Auto Thermal Black
After final inspection the material is moved to packing section. 100% visual inspection is again done at the time of packing for any surface discontinuities.
The packing of material is carried out in both:
The material is packed in high quality laminated cartoons or HDPE bags as per customer specific requirement. All the cartoons or bags are finally packed in wooden pallet followed by pallet lamination and stripping for the safe and convenient dispatch to our valuable customers.