Steel Forged Bars and Rings Manufacturer & Supplier
Steel Forged Bars and Rings Manufacturer & Supplier in Kolkata
Tumas Group manufacturer and supplier the forged bars, forged rings in India for a multitude of applications in various grades like carbon steel, alloy steel(creep steel, case carburising, nitriding steel etc.), stainless steel and tool & die steel. The bars are straightened to remove any twist and give superior yields in the end product. We are Tumas Group is a leading Steel Forged Bars and Rings Manufacturer & Supplier in Kolkata.
WHAT IS FORGED BAR?
This process, like a hot rolled bar, takes a billet and heats it until it is malleable. This is where the processes differ, rather than rolling the bar to get it to size, forging either hammers or presses the bar to the rough dimensions required. The operation gives the bar a 3:1 reduction ratio minimum, which means that the grain sizes are much smaller and tighter in a forged bar, and it consolidates the centers if there are any piping issues. Then, depending on the diameter of the bar, the bar is put through a planishing mill giving it a smooth, rounded surface.
Pros & Cons Forged Bar
Forged bar process takes the best of hot rolled and cold rolled bar and achieves it quickly and efficiently. These bars maintain dimensions and straightness as they cool while having an even higher yield strength because of forgings’ unique capability of producing sound-centers during the forging step. The 3:1 minimum reduction helps eliminate any centerline non-consolidation issues that affect bar quality. Unlike the additional step in cold rolling, the extra step of rolling after forging is done while the bar is hot, so there is no time wasted on additional processes after cooling. Forged bar can be used for single or multiple piece requirements and produced on demand. The other significant advantage is for large diameters. The rolled bar is produced to a specific maximum size where the forged bar has a broader span of diameter capabilities.
WHAT IS FORGED Rings?
Forged rings are metal rings that are made from a forging process. Forging is a manufacturing process that shapes metal by hammering, pressing, or rolling hot metal while it is in a molten state. Forged rings are stronger and more durable than those made by other manufacturing processes. They are used in a wide range of industries including aerospace, automotive, and oil and gas. They are often used in applications where strength, durability, and reliability are critical, such as in high-pressure valves, gears, and bearings. Forging rings come in a variety of materials and sizes. They can be made from carbon steel, alloy steel and stainless steel. They are used for manufacturing precision tools, heavy machinery and other products.
Steel Forged Bars and Rings Manufacturer & Supplier in India
Manufacturing Process for Forged Bars and rings
The square/flat 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 as per customer requirements by any one of the following processes
- Annealing
- Normalizing
- Stress Relieving
- Quenching and Tempering
- Spheroidizing Annealing
They are also offered in bright condition by
- Proof machined upto Dia 100mmx6000mm length to Dia 700mm and 5000mm length
- Finish CNC machining as per drawing of upto 4000kg single piece
They are also offered in
- Cut to length
- Multiple lengths
- Centres on both size
Quality Check of Forged Bars and rings
Following checks are conducted in bars/rings/step shafts 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 verniers and Go No-Go gauges
- Step down testing
- Upset forging test
- NMIR (Non metallic inclusion rating)
- Macrostructure testing
- Microstructure phase analysis
- Grain Size
- Ultrasonic Testing for internal defects
- Radioactivity test
- Gas analysis (O, N, H)
Different grades
We are manufacturing bars in various grades and suppliyng. We are a leading manufacturer of Steel Forged Bars and Rings in India.
We manufacture the following popularly used grades:
EN19, EN24, EN25, EN26, EN30, EN31, EN36C, EN39, EN 40, EN41B, EN42, EN9, EN14A, EN15, EN16, EN18, EN47, EN100, EN351, EN353, EN354, EN355, C22E, C25E, C30, C35E, C45, CK45, C50, C55, C60, S45C, S235J2, S275J2, S355J2, ST52.3, C35E, C45R, 35B2, 28Mn6, 46Cr2, 34Cr4, 41Cr4, 20Mn5, 42CrMo4, 50CrMo4, 30CrNiMo8, 34CrNiMo6, 36CrNiMo4, 36NiCrMo16, 51CrV4 27MnCrB5, 32CrB4, 25CrMo4, 20MnCr5, 16MnCr5, 16MnCrS5,17CrNiMO6, 18CrNiMo7, 20MnB4, 23MnB4, 23MnB3, 34CrMo4V, SS410, SS416, SS420, SS431, SCM420, SCM440, 13Ni13Cr3, 15Ni16Cr5, 36Si7, 40Cr4, 15Ni5Cr4Mo1, 15Ni7Cr4Mo2, 16Ni8Cr6Mo2, 36Si7, 37C15, 35Mn6Mo3, 40Ni6Cr4Mo3, 40Ni10Cr3Mo6, 55Si7, 50Cr4V2, 25Cr13Mo6, 10C8S10, 14Cr14S14, 25C12S14, 40C10S18, 11C10S25, 40C15C12,
SAE 1010, SAE1025, SAE1030, SAE 1035, SAE 1040, SAE 1117, SAE1541H, SAE4130, SAE4135, SAE4140, SAE4145, SAE4145H, SAE 4330, SAE 4340, SAE 4820, SAE5160, SAE8620, SAE 8630, SAE8640, SAE52100, SAE9310, AISI1010, AISI1025, AISI1030, AISI 1035, AISI 1040, AISI 1117, AISI1541H, AISI 4130, AISI4135, AISI4140, AISI4145, AISI4145H, AISI 4330, AISI 4340, AISI4820, AISI 5160, AISI 8620, AISI 8630, AISI 8640, AISI 9310
BS970 080A15, 080M15, 070M20, 080A30, 080M30, 080M40, 080A42, 080A47, 080M50, 070M55, 150M19, 150M36, 045A10, 045M10, 080M15, 210M15, 635M15, 637M17, 655M13, 665M17, 805M17, 805M20, 815M17, 820M17, 822M17, 835M15, 530M40, 605M36, 606M36, 708M40, 709M40, 722M24, 817M40, 826M31, 826M40, 945M38, 410S21, 416S21, 416S29, 420S29, 420S37, 431S29
EN 10088-3 X12Cr13, X20Cr13, X30Cr13, X17CrNi16-2
ASTM A105, ASTM A182 F5, ASTM A182 F9, ASTM A182 F11, ASTM A182 F12, ASTM A182 F22, ASTM A182 F91, ASTM A182 F92, ASTM A350 LF2, ASTM B16, ASTM A193 B7, ASTM A193 B16, ASTM A266 Grade 1-2-3 and 4, ASTM A29 all grades, ASTM A540 B21, ASTM A540 B22, ASTM A540 B23, ASTM A540 B24, ASTM A540 B24V
X22CrMoV121, 21CrMov57, 40CrMoV4-6, 27NiCrMoV15-6, 26 NiCrMo 14-6, 20CrMoVTiB4-10, X19CrMoNbVN11-1, X10CrMoVNb9-1
DIN 1.2714/DB6, DIN1.2343/AISI H11, Din 1.2344/AISI H13
GOST 4543-71 33XC, 38XC, 40XC, 45XH, 30XH3A, 12X2H4A, 20X2H4A, 20X2H4MA, 18X2H4MA, 30XGCA, 40ХН2МА, 40Х2Н2MA, 30ХН2МА