Siemens Energy USA Forging from India: Gas Turbine and Power Generation

August 3, 2026


Siemens Energy US — producing the SGT6-5000F and SGT6-9000HL gas turbines at the Charlotte, North Carolina facility – procures compressor disc forgings, turbine disc forgings, rotor shaft forgings, and structural casing rings for US power generation programmes. Indian forging manufacturers with Inconel 718 and CrMoV alloy steel capability are positioned to supply Siemens Energy through its global power generation supply chain.

ComponentMaterial (EN)Material (ASTM)Weight
Gas turbine compressor disc30CrNiMo8 / Inconel 718AMS 5663300–2,000 kg
Steam turbine rotor disc30CrMoV9A470 Class 8500–5,000 kg
Rotor shaft section30CrMoV9A470 Class 82,000–10,000 kg
Diaphragm ringX20Cr13 / 30CrMoV9410 SS / CrMoV200–2,000 kg

Siemens Energy applies both EN (European Norm) and ASTM material specifications – reflecting its German engineering heritage. Indian suppliers must demonstrate capability to EN 10269 Grade 30CrMoV9 alongside ASTM A470 Class 8. Siemens Energy’s quality framework references VDA standards in some areas alongside AS9100D.

EN specification dual compliance: Siemens Energy may accept ASTM A470 Class 8 with EN 10269 equivalency documentation a technical assessment that the ASTM material achieves the EN-specified properties. Indian forging manufacturers with experience in both ASTM and EN material frameworks have an advantage in Siemens Energy qualification.

Supplier entry point: Siemens Energy’s SGT-400 and SGT-800 industrial turbines smaller machines in the 15–50 MW range use smaller disc forgings (100–500 kg) that are more accessible entry points than the large SGT6-9000HL heavy frame discs (1,000–3,000 kg).

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Vinir Engineering’s Capability

  1. Inconel 718 double ageing in AMS 2750-calibrated furnaces.
  2. CrMoV alloy steel open die forgings up to 15,000 kg.
  3. Ring rolling to Ø4,500mm for diaphragm and casing rings.
  4.  NABL Charpy at elevated temperature for CrMoV rotor qualification.
  5. AS9100D full scope.

Frequently Asked Questions

1.Why does Siemens Energy apply EN material specifications for US power plant forgings?+–
Siemens Energy’s turbine design heritage is German the SGT and SST series were designed to EN codes and material specifications. When Siemens Energy builds these turbines in Charlotte NC for US customers, the fundamental design including material specifications is unchanged from the European version. Converting the entire material specification library from EN to ASTM would require re-qualification testing. Instead, Siemens Energy accepts ASTM materials with documented EN equivalency. The practical result for Indian forging manufacturers: demonstrate capability to both EN 10269 Grade 30CrMoV9 and ASTM A470 Class 8, and provide dual-standard material certification.