Forged Wind Turbine Components — Windenergie
Shivam Forge supplies precision hot forgings for German wind turbine manufacturers and their Tier 1 suppliers — hubs, bearing flanges, main shaft forgings, nacelle frames, and tower transition pieces. Material 42CrMo4, 34CrNiMo6, S355NL; EN 10228 NDE; DNV-GL and Bureau Veritas certification support. CIF Hamburg pricing in EUR.
Germany is Europe's largest wind energy market with over 60 GW of installed capacity and an ambitious 2030 target of 115 GW onshore plus significant offshore expansion. German wind turbine OEMs — including Enercon, Nordex, Siemens Gamesa, and Vestas' German operations — and their Tier 1 component suppliers require large structural forgings in certified alloy and structural steels that meet EN 10228 NDE standards and type approval from certification bodies like DNV-GL and Bureau Veritas. Shivam Forge provides these forgings at 25–35% below comparable European costs, with full technical certification support.
Large rotor hub forgings in S355NL or 42CrMo4 for 2–5 MW onshore and 5–15 MW offshore turbines. Hub weight 5–25 tonnes (raw forging). Bolt flange faces machined to Ra 3.2 µm; bore machined for main shaft or direct drive generator fit. EN 10228 UT class 4 for critical areas. Full dimensional report against 3D model. DNV-GL material approval support.
Forged main shafts in 42CrMo4 Q+T or 34CrNiMo6 for geared and direct-drive wind turbine drivetrains. Shaft diameter 250–600 mm, length 2–6 m. EN 10083 material certification with UTS ≥900 MPa, Charpy impact 60 J at -40°C. EN 10228-3 UT scan (class 3/4) with scan record. Journal areas rough-turned; key slots or splines machined on request.
Rolled or forged bearing ring blanks in 42CrMo4 or SAE 4150 for main rotor bearings, pitch bearings, and yaw bearings. OD 500 mm to 4,000 mm, height 100–600 mm. Raceway area turned to roughing stock; hardening bore machined for press-fit. EN 10228 UT from each ring. Matched sets for double-row bearing assemblies supplied with matched weight documentation.
Large structural ring forgings in S355NL / S355J2 for tower-to-foundation transition pieces, tower section flange rings, and monopile connection flanges for offshore towers. OD up to 7 m available as rolled ring forgings. EN 10228 UT, MT surface inspection. Flatness ≤1 mm across flange face. ISPM-15 export packaging for port delivery.
Forged nacelle structural components — main frame supports, torque arm brackets, and bedplate attachment lugs — in S355NL or 42CrMo4. For cast-iron nacelle frames, we supply forged inserts and shafts that interface with the casting. EN 10025-3 steel certification, EN 10228 NDE on stressed areas. Welding-compatible surface preparation for sub-frame assembly.
Generator shaft forgings in 42CrMo4 or 34CrNiMo6 for direct-drive permanent magnet generators and geared generator systems. Shrink-fit bearing seats machined to j6/k6 tolerance. Keyways broached or machined. Balance bores for dynamic balancing. Shaft runout ≤0.02 mm TIR over bearing span. PPAP-equivalent first-article inspection.
We assist German wind OEMs and Tier 1 suppliers in meeting DNV-GL material and manufacturing requirements. Our documentation package includes EN 10204 3.1 material certificates, EN 10228 NDE reports with scan diagrams, heat treatment charts with temperature records, and production process descriptions for DNV-GL design/type approval submissions. DNV-GL third-party witness inspection available.
Third-party inspection at our Rajkot facility by Bureau Veritas (BV), TÜV Rheinland, SGS, or Intertek is available for German wind customers requiring independent material and dimensional verification. Inspector witness of heat treatment, mechanical testing, NDE, and final dimensional inspection. Inspector reports issued under BV or TÜV letterhead for design authority acceptance.
All structural wind forgings are UT-tested per EN 10228-3 (Class 3 standard, Class 4 for critical rotating parts). UT scan coverage 100% of forging volume with record of any indications. Magnetic particle testing (MT) per EN 10228-1 on all accessible surfaces. Operators qualified per EN ISO 9712 Level II. UT and MT records archived and provided with delivery documentation.
S355NL (1.0546) forgings to EN 10025-3 with guaranteed Charpy impact energy ≥27 J at -50°C — the mandatory impact requirement for German offshore wind tower and foundation structures. Each plate and ring is impact-tested at -50°C from the production heat; test records included in material certificate. Yield strength ≥355 MPa, UTS 490–630 MPa.
34CrNiMo6 (1.6582) is specified by leading wind turbine OEMs for main shafts, planet carriers, and gear shafts where high fatigue strength and sub-zero toughness are required simultaneously. Our forging process for 34CrNiMo6: controlled billet heating, staged deformation for grain refinement, quench and temper to UTS 1,000–1,200 MPa with Charpy impact ≥50 J at -40°C. Full EN 10083-3 certification.
Each wind forging is stamped with a unique serial number (or engraved on request) linking it to the production batch, billet heat, heat treatment chart, and inspection records. For large components (main shafts, hub forgings) where one-piece-one-certificate traceability is essential for the turbine maintenance record, we provide individual certificates correlated to the stamped ID.
Hamburg is the primary entry point for large wind forging imports to Germany. Mundra Port to Hamburg transit: 15–20 days. For oversized components (main shafts, hubs >4 m), break-bulk or flat-rack container shipping is arranged via specialist heavy-lift freight forwarders with port-to-factory transport coordination in Germany. We coordinate with Hamburg-based logistics partners.
Bremerhaven (Niedersachsen) is Germany's primary offshore wind installation and logistics hub — where Siemens Gamesa and other manufacturers assemble offshore turbines. We can route shipments to Bremerhaven port for customers assembling offshore components there. Transit time from Mundra to Bremerhaven: 16–22 days.
Wind main shafts (3–6 m long, 600–800 mm dia) and hub forgings (2–4 m dia) require flat-rack or open-top container shipping. We coordinate with specialist heavy-lift freight forwarders familiar with oversized cargo to Hamburg and Bremerhaven. Lashing and blocking per IICL standards; cargo insurance arranged on request.
Large wind forgings have longer lead times than standard industrial components. Hub forgings (10–25 tonne raw): 10–14 weeks from order to despatch. Main shaft forgings (2–8 tonne): 8–12 weeks. Tower flange rings (1–5 tonne, open ring): 6–10 weeks from rolled ring blank. These include die manufacture or ring rolling tooling setup, production, heat treatment, NDE, and inspection.
Germany's wind energy sector — Windenergie — is Europe's largest and most technically demanding. Enercon, Nordex, Siemens Gamesa (German operations), and GE Renewable Energy's European manufacturing all operate in Germany, alongside a large Tier 1 and Tier 2 supply chain for tower flanges, bearing rings, main shafts, and hub castings/forgings. The sector demands certification standards (DNV-GL, TÜV, Bureau Veritas) and material standards (EN 10228 NDE, EN 10025-3 for S355NL, EN 10083-3 for 42CrMo4 and 34CrNiMo6) that require a serious manufacturing partner, not a simple commodity supplier. Shivam Forge has the metallurgical capability, NDE resources, and certification infrastructure to supply to these standards.
The cost case for sourcing wind forgings from India is compelling for German Tier 1 suppliers facing project cost pressure. A forged main shaft in 42CrMo4 Q+T, produced in Germany with German labour, might cost €45,000–65,000 for a 3-tonne component. The same component from Shivam Forge, CIF Hamburg with EN 10228 UT and DNV-GL-accepted EN 10204 3.1 certificate, might cost €30,000–40,000 — a saving of €15,000–25,000 per shaft. For a 100-turbine project with one shaft per turbine, that is €1.5–2.5 million in project cost savings. The logistics footprint is manageable: 15–20 day ocean transit from Mundra to Hamburg with production buffer stock held in Rajkot.
Shivam Forge's process for wind turbine forgings follows a disciplined quality plan. Billet steel is procured from Indian mills with EN 10204 3.1 certification referencing the specific DIN EN grade (42CrMo4 per EN 10083-3, S355NL per EN 10025-3, 34CrNiMo6 per EN 10083-3). Forging is performed with stage-by-stage temperature monitoring and deformation logs. Heat treatment is conducted in programmable furnaces with thermocouple calibration records and chart printouts for every load. Mechanical testing (UTS, YS, elongation, Charpy at specified temperature) is performed on sacrificial test coupons taken from the representative test position. NDE (UT and MT) is performed by Level II operators with scan records. All records are compiled in a material dossier unique to the delivery lot.
For German wind energy buyers exploring Indian forging supply for the first time, Shivam Forge recommends a qualification programme: agree on one or two non-critical component types for first qualification (tower bolt rings, generator support flanges), run an initial batch with full third-party inspection witnessing, evaluate documentation quality and dimensional conformance, then escalate to rotating structural components (main shaft, hub). This staged approach manages technical risk while allowing both sides to build confidence in the supply relationship. Contact us at sales@shivamforge.com or +91-9265772827 to begin the qualification process.
We supply to German wind turbine OEMs and their Tier 1 component suppliers — either directly or through a German procurement entity. We provide all technical documentation required for DNV-GL, Bureau Veritas, or TÜV Rheinland type approval: EN 10204 3.1 material certificates, EN 10228 NDE reports, heat treatment charts, and dimensional records. Third-party witness inspection at our Rajkot facility is available.
We can produce forgings up to approximately 2,000 kg finished weight from our existing press capacity. For larger components (main shafts >2 tonnes, hub forgings >3 tonnes), we work with our extended forging network in Rajkot-Shapar where 2,000-tonne and 4,000-tonne presses are available. All quality control and certification is managed by us.
Yes. EN 10228-3 Class 4 (the most stringent UT class for highly stressed rotating components) is available for critical wind turbine components — main shafts, bearing rings, and hub flanges. Our UT operators are qualified to EN ISO 9712 Level II. Scan records covering 100% of the forging volume are archived and provided with the delivery documentation.
Hub forgings of 5–25 tonnes typically have a production lead time of 10–16 weeks from order, including die or tooling fabrication, staged forging operations, heat treatment, NDE, and final machining of flange faces. Add 15–20 days ocean freight to Hamburg. For repeat orders on proven tooling, lead time reduces to 8–12 weeks. First-article review is mandatory before production release.
Yes. Third-party inspection by Bureau Veritas, TÜV Rheinland, SGS, Intertek, or customer-nominated inspectors is available at our Rajkot facility. Inspector can witness heat treatment operations, mechanical testing, UT/MT NDE, and final dimensional inspection. Inspector reports are issued under the TPI's letterhead and form part of the delivery documentation.
Yes. S355NL ring forgings and plates for offshore tower flange rings are within our capability. EN 10025-3 certification with Charpy impact testing at -50°C as standard. Flatness and parallelism of flange faces controlled to ≤1 mm. UT per EN 10228-3 on the full ring body. For very large rings (OD >3 m), ring-rolling on our expanded network is arranged with us managing all QC.
For wind turbine structural forgings (hub flanges, tower rings, shaft forgings), Indian prices including CIF Hamburg freight are typically 25–35% below equivalent German domestic forging prices. The saving is driven by lower forge shop labour (€3–5/hour in India vs €40–55/hour in Germany) and competitive alloy steel input costs. For large-volume components like tower flange rings, total project savings can be several hundred thousand Euros.
Main shafts 3–6 m long and 500–700 mm diameter are shipped on flat-rack containers from Mundra. We coordinate with specialist heavy-lift freight forwarders for booking, lashing design, and loading survey. Destination port is Hamburg (preferred) or Bremerhaven. Delivery to the factory in Germany is arranged through our logistics partners. We handle the full freight management including cargo insurance.
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.
