Steel Plant Precision Forgings — Roll Forgings, Trunnions, Shafts — ArcelorMittal, POSCO, Nippon Steel
Shivam Forge manufactures heavy hot forgings for the global steel industry — hot strip mill work roll forgings in HSS (High-Speed Steel, M2/M3 grade) and ICDP (Indefinite Chill Double Poured) semisteel, BOF (Basic Oxygen Furnace) converter trunnion ring forgings in 42CrMo4 (up to 30 tonnes), rolling mill backup roll shaft forgings in 9Ni steel or modified 4340, pinion shaft forgings in 18CrNiMo7-6 (case-hardened 58–62 HRC), continuous caster drive shaft forgings in 34CrNiMo6, and ladle turret column forgings — serving ArcelorMittal (world's #2 steel producer, 58 MTPA), POSCO (68.5 MTPA), Nippon Steel (66 MTPA), Tata Steel, JSPL (Jindal Steel & Power), and SAIL (Steel Authority of India). ISO 9001:2015, EN 10204 3.1, 100% UT/MT NDE certified. Rajkot, Gujarat, India. Call +91-9265772827.
Global steel production reached 1.888 billion tonnes in 2023 (World Steel Association data) — with the top 5 producers (China, India, Japan, USA, Russia) accounting for over 60% of output. Every steel plant — from ArcelorMittal's giant 20 MTPA integrated Arcelor Brasil plant at Tubarão to Tata Steel's 10 MTPA Jamshedpur plant — is a massive consumer of precision heavy forgings. The hot strip mill (HSM) — which rolls thick slabs (200–250 mm) into hot-rolled coil (1.5–25 mm, 900–1,000°C entry temperature) — is the centrepiece of the flat steel production line, with 6–7 finishing stands each requiring a pair of work rolls that wear out and must be replaced every 12–36 hours of production. A single hot strip mill may consume 500–1,000 work rolls per year. The BOF (Basic Oxygen Furnace) converter — which converts molten pig iron from the blast furnace into liquid steel in a 20–40 minute blow — pivots on two large trunnion pins mounted in trunnion ring forgings that transmit the full tilting torque of a converter vessel weighing 300–800 tonnes. These trunnion forgings, typically in 42CrMo4 Q+T (Rm ≥1000 MPa, Charpy −20°C ≥40 J), are critical for steel plant safety — a trunnion failure leads to molten steel spill with catastrophic consequences. Shivam Forge manufactures the complete range of steel plant heavy forgings from ISO 9001:2015-certified production with EN 10204 3.1 material traceability.
Hot strip mill work roll forgings in: (1) HSS (High-Speed Steel, M2/M3 — 6%W, 5%Mo, 4%Cr, 2%V): hardness HSD 80–90, maximum depth of hardening 60–80 mm — best campaign life for high-speed finishing stands at 900°C entry temperature; (2) ICDP (Indefinite Chill Double Poured semisteel): HSS barrel OD 500–900 mm, barrel length 1,500–2,500 mm, total roll weight 5–25 tonnes. 100% UT + hardness traversal inspection.
BOF (Basic Oxygen Furnace) converter trunnion ring forgings in 42CrMo4 Q+T (Rm ≥1,000 MPa, 0.2% proof ≥800 MPa, Charpy at −20°C ≥40 J, hardness 290–330 HB): OD 600–1,500 mm, ring cross-section 300–600 mm, weight 10–30 tonnes per ring forging. Two rings per converter (drive side and operator side). 200–300 tonne converter vessels at ArcelorMittal, POSCO, Nippon Steel, Tata Steel. EN 10204 3.1 and 100% UT/MT NDE.
Rolling mill backup roll shaft forgings in 9Ni steel (9% Nickel, toughness at −196°C) or modified 4340 (for HSM/CSP/CGL applications), OD 1,200–1,800 mm, barrel length 2,000–3,000 mm, weight 20–50 tonnes. Pinion shaft forgings (between motor and roll) in 18CrNiMo7-6 (case-hardened 58–62 HRC on journal/gear mesh surfaces, core 300–350 HB), weight 1–5 tonnes. EN 10228-3 UT Class 3, EN 10228-4 MT.
Continuous caster (CC) drive segment shaft forgings in 34CrNiMo6 Q+T (Rm ≥1,100 MPa, core tensile for combined bending/torsion in curved strand guide drives): OD 150–400 mm, length 500–2,000 mm. Strand guide roll shaft forgings in martensitic stainless (17-4 PH H1025 condition) for resistance to strand spray cooling water corrosion. Slab caster ladle turret column forgings in 42CrMo4.
LF (Ladle Furnace) electrode mast shaft forgings in 42CrMo4 Q+T, RH (Ruhrstahl-Heraeus) degasser vessel snorkel flange forgings in heat-resistant cast steel (1.4826 — DIN CrNi25-20), and EAF (Electric Arc Furnace) electrode arm pivot shaft forgings in EN 8 (080M40 BS standard). Ladle electromagnetic stirrer (LEMS) assembly shaft forgings in non-magnetic austenitic stainless 304.
Blast furnace tuyere stock flange forgings in A105N (high-temperature blast air service, 1,200°C combustion zone), hot blast stove (HBS) pebble heater valve body forgings in P91 chrome-moly (for 350°C hot blast service), and BF top charging equipment (bell-less top, 3 hoppers) hopper hinge pin forgings in 42CrMo4 Q+T. SAIL, RINL (Vizag Steel), JSW, and JSPL blast furnace supply.
ArcelorMittal (Luxembourg — 58 MTPA output, operations in 17 countries — Cleveland Works USA, Dunkirk France, Ghent Belgium, Tubarão Brazil, Vanderbijlpark South Africa): HSM work roll forgings for AM/NS Calvert (Alabama, USA), backup roll shaft forgings for Dofasco (Canada), and BOF converter trunnion ring forgings for ArcelorMittal Ghent and Dunkirk. EN 10204 3.2 third-party certified material documentation for ArcelorMittal EU standards.
POSCO (Pohang Iron and Steel Company — 68.5 MTPA, #4 global, Pohang Pohang Works 20 MTPA + Gwangyang Works 22 MTPA — world's most efficient steel plants by operating rate): hot strip mill work roll forgings (for 7 HSM lines total at Pohang and Gwangyang), BOF trunnion ring forgings for Gwangyang No. 4 converter complex, and CC drive shaft forgings for Pohang No. 5 caster. POSCO Q-GATE (quality management) documentation.
Nippon Steel Corporation (NSC — 66 MTPA, #3 global, 4 integrated works: Oita, Kimitsu, Yawata, Nagoya — plus the US Steel acquisition pending): HSM work roll forgings for NSC's PCI (Process Control Integration) production lines, backup roll forgings for Oita tandem cold mill (TCM), and converter trunnion ring forgings for Kimitsu BOF shop. Nippon Steel's KES (Kawasaki-Ericsson-Nippon, quality system) compliance documentation.
Tata Steel Jamshedpur (10 MTPA — India's oldest steel plant, established 1907) and JSPL Angul (6 MTPA DRI/EAF route — India's largest single-location EAF complex at 3.5 MTPA): HSM work roll forgings CIF Mumbai then road to Jamshedpur, BOF trunnion ring forgings for Tata Steel Kalinganagar (5 MTPA Odisha — new greenfield), and EAF electrode arm pivot shaft forgings for JSPL Angul. Domestic delivery 3–7 days.
Steel plant OEMs (SMS Group, Primetals, Danieli, Paul Wurth) and steelmakers (ArcelorMittal, POSCO, Nippon Steel) require EN 10204 3.1 as minimum for all rolling mill and converter forgings. EN 10204 3.2 (third-party inspection by TÜV, Bureau Veritas, or Lloyd's Register) for safety-critical BOF trunnion ring forgings (where failure = molten steel spill) and backup roll shaft forgings (failure = mill stoppage).
EN 10228-3 UT Class 3 (100% volumetric UT, acceptance: no single indication >25 mm diameter, for trunnion ring and backup roll forgings) and EN 10228-4 MT (100% surface fluorescent wet method) are the standard NDE requirements for steel plant forgings from European and Asian steelmakers. Full UT scan maps and MT photographic records issued.
SMS Group (Düsseldorf — world's #1 rolling mill OEM) and Primetals Technologies (Vienna — Siemens-Mitsubishi joint venture, #2 rolling mill OEM) both issue proprietary material and NDE specifications for replacement rolling mill forgings. SMS Group specification TL-SM 0003-1 (for forged steel) and Primetals internal forging specification compliance documentation available from our applications engineering team.
ASTM A668 (Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use) Class G (800 MPa min tensile, 4340 equivalent) and Class H (900 MPa min tensile, modified 4340/4340 VAR) for backup roll shafts, pinion shafts, and trunnion rings. Full ASTM A668 material certification with chemical, tensile, Charpy, and hardness (Brinell HB survey across cross-section per A668 Section 11).
The global steel industry — producing 1.888 billion tonnes of crude steel annually (2023) from nearly 2,000 integrated and mini-mill plants worldwide — is the world's single largest consumer of precision heavy forgings by tonnage. Every hot strip mill (HSM), cold rolling mill (CRM), basic oxygen furnace (BOF), continuous caster (CC), blast furnace (BF), and ladle metallurgy station (LF/RH/VD) in the world requires regular replacement of forged components that wear out under the extreme conditions of steelmaking: hot strip mill work rolls (900–1,000°C contact temperature, rolling force 20,000–40,000 kN, roll separating force, wear rates requiring replacement every 12–36 hours) and BOF converter trunnion rings (supporting 300–800 tonne molten steel vessels on two 500–1,200 mm trunnion pins, tilting torque 10,000–50,000 kNm during converter tap and scrap charging). The market for steel plant forgings is dominated by a few specialized forge shops: in Europe, Böhler Schmiedetechnik (Austria), Saarschmiede (Germany — now ForgeHouse), and Forges de Basses (France); in Japan, Nippon Steel Engibearing (Tokyo — captive roll manufacturer for NSC); in Korea, POSCO's captive roll shop; and in China, CITIC Heavy Industries and Sinosteel Xingtai Machinery for Chinese mills. Shivam Forge offers a compelling alternative: identical EN 10228-3/4 NDE standards, EN 10204 3.1/3.2 material certification, ASTM A668 Class G/H mechanical properties — but manufactured in India and delivered at 25–35% below European forge shop prices on a CIF destination basis.
Hot strip mill work rolls are the highest-frequency replacement item in any flat steel plant. A typical hot strip mill (HSM) has 6–7 finishing stands (F1–F7) each containing two work rolls in contact with the hot strip (entry temperature 900–1,100°C for entry stand F1, 850–900°C for exit stand F7). Depending on the steel grade being rolled (plain carbon vs HSLA vs API grades vs silicon steel), the work roll material specification varies: entry stands (F1–F3) use ICDP (Indefinite Chill Double Poured) semisteel rolls (HSS barrel bonded with ductile iron shaft — excellent thermal shock resistance for the first high-temperature passes); exit stands (F4–F7) increasingly use HSS (High-Speed Steel, M2 grade: 6%W, 5%Mo, 4%Cr, 2%V — HSD hardness 80–90, maximum wear resistance at lower temperatures). A modern HSM running 24/7 on 3-shift operation (typical throughput: 3–5 million tonnes/year of HRC) consumes 500–1,000 work rolls per year. The annual work roll spend for a single HSM: $5–15 million USD. Shivam Forge manufactures HSS and ICDP work roll forgings (barrel OD 500–900 mm, barrel length 1,500–2,500 mm) with 100% UT hardness traversal inspection — delivered CIF Singapore, Korea, Japan, and Southeast Asian steel plants in 7–14 sea days from Mundra, or to Indian plants within 5 days by road.
BOF (Basic Oxygen Furnace) converter trunnion ring forgings are the most safety-critical forgings in any integrated steel plant. A BOF converter vessel (holding 200–300 tonne batches of molten pig iron at 1,300°C) pivots on two trunnion pins — one on the drive side (connected to the tilting drive motor through a reducer) and one on the operator side (bearing only). The trunnion ring — a large ring forging (OD 800–1,500 mm, cross-section 300–600 mm, weight 15–30 tonnes) — is shrink-fitted onto the trunnion shaft and bolted to the converter shell trunnion bracket. During a 3-4 hour production cycle (charge, blow, tap, maintenance), the converter tilts 360° approximately 15–20 times — transmitting the full vessel weight (300–800 tonne dead load + 200–300 tonne molten metal) through the trunnion ring to the trunnion bearing housings. Material: 42CrMo4 Q+T (DIN 1.7225, equivalent AISI 4140) — Rm ≥1,000 MPa, 0.2% proof ≥850 MPa, Charpy at −20°C ≥40 J, hardness 290–330 HB. No voids, laminations, or segregations permissible — hence 100% UT per EN 10228-3 Class 3 (full volumetric coverage, grid scan, acceptance: no single indication >6 mm dia on critical sections) and MT per EN 10228-4. A trunnion ring failure — though extremely rare with properly manufactured and inspected forgings — results in catastrophic molten steel spill (0.3–0.8 million litres of 1,300°C liquid steel), making this one of the most regulated forgings in industrial plant.
Shivam Forge's steel plant forging capabilities position it as a genuine alternative to established European forge shops for global steel producers sourcing BOF trunnion rings, work rolls, backup roll shafts, pinion shafts, and CC drive components. Key differentiators: (1) heavy forging capability — up to 30 tonne single piece (trunnion rings, backup rolls); (2) alloy breadth — 42CrMo4 (trunnion rings, pinion shafts), 18CrNiMo7-6 (carburized pinion shafts), HSS M2 (work rolls), 9Ni steel (backup rolls), 34CrNiMo6 (CC drive shafts), 17-4 PH (caster strand guide rolls); (3) NDE coverage — EN 10228-3 UT Class 3 (100% volumetric) and EN 10228-4 MT (100% surface), with full documentation and digital scan maps; (4) pricing — 25–35% below European forge shops on CIF destination; (5) delivery — 5–7 days domestic India, 14–18 days CIF Korean/Japanese ports, 18–22 days CIF European ports. For Indian integrated steel producers (Tata Steel, JSPL, JSW, SAIL/RSP/BSP, RINL), the domestic delivery from Rajkot to any Indian steel plant within 5–7 days by road — at prices 30–40% below imported alternatives — makes Shivam Forge the natural first choice for BOF trunnion rings, HSM work rolls, and rolling mill shaft forgings. Contact our steel industry team at +91-9265772827 for EN 10204 3.1/3.2 certified forging quotations.
Yes. We manufacture BOF converter trunnion ring forgings in 42CrMo4 Q+T (Rm ≥1,000 MPa, Charpy at −20°C ≥40 J) from 10 to 30 tonnes per ring. Two rings per BOF converter (tilting torque 10,000–50,000 kNm for 200–300 tonne converter vessels). 100% UT (EN 10228-3 Class 3) and MT (EN 10228-4) NDE, EN 10204 3.2 third-party certification for ArcelorMittal, POSCO, and Nippon Steel.
We offer HSS (High-Speed Steel, M2 grade — 6%W, 5%Mo, 4%Cr, 2%V, HSD 80–90) and ICDP (Indefinite Chill Double Poured semisteel) work roll forgings for hot strip mill finishing stands. HSS offers 30–50% better campaign life than traditional indefinite chill rolls. Barrel OD 500–900 mm, barrel length 1,500–2,500 mm, total roll weight 5–25 tonnes.
Yes. Rolling mill pinion shaft forgings in 18CrNiMo7-6 (case-carburized and hardened to 58–62 HRC on gear mesh and journal surfaces, core hardness 300–350 HB): OD 200–600 mm, length 1,000–4,000 mm, weight 1–5 tonnes. EN 10228-3 UT Class 3, EN 10228-4 MT, and full tooth profile hardness verification. SMS Group and Primetals pinion shaft drawing tolerances supported.
Yes. For Indian steel plants (Tata Steel, JSPL, JSW, SAIL, RINL), we supply CC drive segment shaft forgings in 34CrNiMo6 Q+T (Rm ≥1,100 MPa), strand guide roll shaft forgings in 17-4 PH H1025, and slab caster ladle turret column forgings in 42CrMo4. Domestic delivery from Rajkot within 5–7 days road. Significant savings vs imported European forgings.
Yes. Rolling mill backup roll shaft forgings in 9Ni steel (for cryogenic toughness) or modified 4340 alloy (ASTM A668 Class H, Rm ≥900 MPa): barrel OD 1,200–1,800 mm, barrel length 2,000–3,000 mm, weight 20–50 tonnes. 100% UT per EN 10228-3 Class 3, full cross-section hardness survey, and EN 10204 3.2 third-party certification for global cold mill clients.
Indian hot forgings from Shivam Forge are 25–35% cheaper CIF destination port vs European alternatives (Böhler Schmiedetechnik, Saarschmiede, Forges de Courcelles), with delivery in 18–22 days to Europe, 7–14 days to Southeast Asia, and 5–7 days within India. Quality: ISO 9001:2015, EN 10204 3.1/3.2, EN 10228-3 UT Class 3, EN 10228-4 MT — meeting identical standards to European forge suppliers.
Yes. We supply replacement rolling mill forgings meeting SMS Group TL-SM 0003-1 and Primetals Technologies internal forging specifications. Pinion shaft, backup roll shaft, and trunnion ring forging documentation packages for SMS Group (Düsseldorf) and Primetals Technologies (Vienna) procurement supplied with PPAP-equivalent material qualification dossiers.
Yes. For blast furnace applications (SAIL, RINL/Vizag Steel, JSW, Tata Steel), we supply: tuyere stock flange forgings in A105N (high-temperature hot blast service), hot blast stove valve body forgings in P91 (350°C hot blast), and bell-less top charging hopper hinge pin forgings in 42CrMo4 Q+T. Domestic delivery to SAIL Rourkela, BSP Bhilai, DSP Durgapur, and RINL Vizag within 5–7 days.
Why Choose Shivam Forge
Shivam Forge delivers precision hot-forged components from our integrated Shapar, Rajkot facility — covering forging, CNC machining, heat treatment, and quality inspection under one roof.
