Introduction to Oversized Seamless Rolled Rings

Iraeta’s total investment in our Oversized Forging Project exceeds 600 million yuan and covers an area of 80,000 square meters. The project relies on the Academician Li Yiyi Workstation, established with the Institute of Metal Research of the Chinese Academy of Sciences, to research and manufacture large forgings of high-alloy steels and non-ferrous metals.


This project applies the latest CNC and smart equipment of forging, heat treatment, and machining equipment including a hydraulic press of 13,500 tons, hearth 8m wide trolley heating furnace, a split heat treatment furnace with an internal diameter of 7.5 meters, a bore type heat treatment furnace with a diameter of 17.5 meters, a quenching sink of 19 meters in diameter and 5 meters in deep, and other large heat treatment equipment, as well as 16 meter turning diameter CNC machinery and other large CNC machining equipment. The RAW 2500/1250-16000/3000 ring rolling machine imported from SMS Meer, Germany for the project is the world's largest radial-axial rolling machine.

Products : Oversized seamless rolled rings, discs, hollows, tube sheets and special-shaped forgings within unit piece of diameter 16m, height 3m and weight 200t

Markets : Offshore wind power, nuclear power, hydropower, refining and chemical, machinery manufacturing, aerospace, mold making, etc.


16m Seamless Ring Rolling Machine

SMS  super ring rolling machine owns great capabilities and can perform stably in hollows and rings forming. His maximum rolling diameter is 16 meters, maximum rolling height is 3 meters. And the radial rolling force is 2500 tons as well as the axial direction of 1,250 tons.

Rolling diameter: 16m, rolling height: 3m, 1 piece weight: 200 tons.

13,500t Hydraulic Press

Tianjin Tianduan 13,500t hydraulic press, equipped with Rexroth hydraulic system and Siemens electronic control system, can achieve high precision control during forging. Maximum height 18.5m, travelling table width 5m with 10m stroke, beam stroke 3.5m, headroom 7m, maximum pressure 13500t.



Carbon steel, alloy steel, stainless steel, nickel-base alloy steel, copper alloy, aluminum alloy, titanium alloy

Diameter Range

Axis≤3m, rings≤16m, hollows≤16m.

Length Range

Axis≤15m, rings≤3m, hollows≤3m.

Piece Weight Range

≤ 200 tons

Heat Treatment

Normalizing, thermal refining, tempering, annealing, solution annealing, precipitation strengthening


Low-temperature impact test, high-temperature tensile test, metallography detection, hardness test, chemical element analysis, destructive and non-destructive testing.


Forging, ring rolling, heat treatment, machining, drilling, 5-axis machining center, precise CNC vertical & horizontal lathe, CNC drilling machine.



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