Hot rolled round bars are generally used in the applications like construction, where finish and precise dimensions aren't a priority. They go through various heat treatment processes such as soft annealing, solution annealing, spheroidized annealing, oil & water quenching, tempering and normalizing. They are essential in fabrication, manufacturing and repair.
Forged Round bars are used for center grinding, rolling and burnishing purposes. These products are well known for their resistance power, dimensional accuracy and length tolerance. They are soft annealed, solution annealed, quenched & tempered to gain the material properties.
| Black Bars | |
|---|---|
| Size range | 16mm – 160mm |
| Grades | All 200series, 300 series, 400 Series ,17-4ph & many more |
| Length | Up to 6 meters |
| Forged Bars | |
|---|---|
| Size range | 170mm – 300mm |
| Grades | All 200series, 300 series, 400 Series ,17-4ph & many more |
| Length | Up to 6 meters |
| Heat treatment | Soft annealed, solution annealed, quenched & tempered |
400 series stainless steel black bars refer to a type of stainless steel that has undergone little in surface processing after hot rolling. In general, "black" usually refers to the surface finish of the bar, which is either unpolished or dark, oxidized in appearance.
The primary difference between black bars and bright bars is based on the production processes and resulting properties:
Forging is a metalworking process that involves shaping metal using localized compressive forces. This is typically done by hammering, pressing, or rolling the metal.
400 Series stainless steel forged bars provide the best for excellent hardness, strength, and resistance to wear and abrasion. The specific properties, such as hardness and strength, that these bars have undergone with the process of forging make them strong in any other application requiring durability and reliability more so in industries like automotive and manufacturing.
Surface finish of forged bars is generally varied by different factors, such as the process applied in forging, the type of material used, and any post-forging treatments. In general, the surface finish of forged bars is quite coarse compared to their machined counterparts because forging creates quite pronounced tool marks and scale from heating.
