Steel Bright Bars
MMC supplies the bright Steel Bars for a multitude of applications and in various grades in carbon steel, alloy steel, stainless steel, tool and die steel etc.
Manufacturing Process for Bright bars
The round bars are made from ingots and are processed after giving required reduction ratio and discarding hot top and bottom for homogeneity. They are either processed by hot rolling or hot forging. These bars are further heat treated by
- Normalizing
- Annealing
- Spheroidizing Annealing
- Stress Relieving
- Quenching and Tempering
Then the bars are bright by either
- Peeling and Reeling (for upto 120mm for rolled)
- Cold drawing (for upto 65mm)
- Proof machining (120-650mm)
They are also offered in
- Cut to length
- Multiple lengths
Quality Check of Die blocks
Following checks are conducted in die blocks and reported in the TEST CERTIFICATE as per customer requirement
- Surface inspection (Magnetic Particle Inspection) is carried out of each bar end to end
- Positive Material Identification using XRF to certify in process chemistry of each bar
- 100%-dimensional verification using calibrated Vernier’s and Go No-Go gauges
- Step down testing
- Upset forging test
- NMIR (Nonmetallic inclusion rating)
- Macrostructure testing
- Microstructure phase analysis
- Grain Size
- Ultrasonic Testing for internal defects
- Radioactivity test
- Gas analysis (O, N, H)