Nimonic 90 Round Bar / Sheet / Forging | Custom Supply & Quote

Shanghai COCESS Special Alloys Co., Ltd.​ is a professional supplier of high-performance nickel-base and cobalt-base superalloys, offering Nimonic 90 (UNS N07090 / W.Nr. 2.4632 / China Grade GH4090 / GH90)​ in round bar, forged billet/ring, limited plate/sheet, and spring wire. All material is supplied in the solution-annealed (SA) condition​ with full traceability, PMI verification, and EN 10204 3.1 / 3.2 Mill Test Report​ including heat analysis (verifying Ni/Cr/Co/Ti/Al), tensile results, and heat treatment record.

Nimonic 90 is a γ′-precipitation hardened Ni–Cr–Co–Ti–Al superalloy​ (nominal Ni–19.5Cr–18Co–2.6Ti–1.5Al, Al+Ti ≈ 3.8–4.8 wt%) qualified to BS HR 1 (Bar/Forging/Wire)​ and cross-referenced to AMS 5829. It is engineered for 650–870°C (1200–1600°F) creep-resistant rotating or stressed parts​ — turbine blades (small engines / legacy designs), nozzle guide vanes (NGVs), high-temperature springs, lock rings, and hot-section fasteners — and is not intended for large thin-walled welded fabrications​ (use Nimonic 263 for combustor liners).

1. Grade Cross-Reference & Standards Compliance

All COCESS shipments are matched to these specifications unless otherwise agreed in writing.

2. Product Forms & Typical Size Ranges

2.1 Round Bar (Black / Rough Turned / Centerless Ground)

• Diameter: Φ8 mm – Φ300 mm​ (black / as-forged); Φ10–Φ100 mm precision ground (h7/h9, Ra ≤ 1.6 µm)

• Length: 1000–6000 mm; random or cut-to-length

• Condition: Solution annealed (1080–1150°C → oil/water quench), soft for machining / pre-form

2.2 Forging Billet / Block / Ring

• Shape: Round billets, square/rectangular blocks, seamless rolled rings (OD up to 800 mm subject to ratio)

• Forgeable stock: typically Φ150–Φ500 mm dia. billet

• Condition: As-forged + solution annealed, or solution annealed only (customer final ages)

• Custom near-net pre-forms: rough turned / pre-drilled / contoured per drawing

2.3 Plate / Sheet (Limited Availability / Made-to-Order)

• Thickness: 6.0 mm – 40 mm​ (plate); 0.8–4.0 mm sheet on indent basis

• Width × Length: 200×600 mm up to 1000×3000 mm (depending on thickness)

• Condition: Solution annealed, descaled + pickled or bright annealed

• Note: Large welded sheet-metal fabrications normally specify Nimonic 263 (N07263)​ — we stock both and can advise substitution.

2.4 Spring Wire / Precision Wire

• Diameter: Φ0.30 mm – Φ8.0 mm

• Condition: Annealed (soft) for customer aging; or Cold-Drawn + Pre-Aged (UTS 1300–1600 MPa, "spring temper")

• Application: Valve springs, lock rings, governor springs (400–600°C design temp.)

2.5 Welding Consumables

• Filler Wire: matching N07090 or ERNiCr-3 (AWS A5.14), diameters 0.8 / 1.2 / 1.6 / 2.4 mm

• Covered Electrode: ENiCrWMo (on request)

Custom non-standard dimensions, oversize forgings, and machined pre-forms (rough-turned / pre-profiled) are available with lead-time quotation.

3. Material Condition & Melting Practice

• Melting Route:​ Vacuum Induction Melting (VIM) + Electro-Slag Remelting (ESR) — guarantees low S/P (S ≤ 0.008 % typical), tight Ti (2.2–3.0 %) and Al (1.0–2.0 %) control, homogeneous γ′ precipitate potential.

• Delivery Condition:​ Solution annealed (1080–1150°C, soak per section → oil or water quench).

  Nimonic 90 requires post-machining / post-forging double-ageing​ by the customer:

  • 1st stage: 700–750°C × 16 h / AC or FC

  • 2nd stage: 650°C × 16 h / AC

  • (Single-stage 700°C × 24 h is possible but sub-optimal for max. stress-rupture.)

• Grain Size (Typical):​ ASTM 3–6 (forging stock / bar)

• Surface Options:

  • Bar: Black (as-forged), Rough turned (peeled), or Centerless ground

  • Plate/Sheet: Descaled + pickled / Bright annealed

  • Wire: Soap-coated / bright / cleaned

4. Chemical & Mechanical Conformance (Summary)

Room-Temp Mechanical Minimum (Solution-Ann. + Double-Aged — BS HR 1 / AMS 5829 ref.):

• Tensile Strength Rm ≥ 1050–1100 MPa (aged)

• Yield Strength Rp0.2 ≥ 650–750 MPa (aged)

• Elongation A₅₀ ≥ 12–15 % (bar / wire)

• Hardness (aged): 34–42 HRC

Elevated-Temperature Tensile (Aged — Typical):

• Rm ≈ 950–1020 MPa @ 650°C; ≈ 780–850 MPa @ 760°C; ≈ 620–690 MPa @ 815°C

• Stress-Rupture (representative): 750°C / 240 MPa ≈ 1000–2000 h; 870°C / 100 MPa ≈ 500–1000 h

5. Typical Applications Supplied

6. Certification & Quality Assurance

Every shipment from Shanghai COCESS includes:

• ✅ EN 10204 3.1 MTR​ (or 3.2 with third-party witness if contracted) — Heat #, Chemistry (incl. Ti/Al/Co), Room-Temp Tensile (SA & aged sample on request), Grain Size, HT Record

• ✅ PMI Verification Report​ (XRF / OES — confirms Ni≈Bal., Cr≈19.5%, Co≈18%, Ti≈2.6%, Al≈1.5%)

• ✅ Dimensional Inspection Report

• ✅ UT / PT / MT reports​ (on forged products or as specified — additional charge)

• ✅ Certificate of Origin / CO / Commercial Invoice / Packing List

Materials are fully traceable to melt shop with VIM+ESR pedigree.

7. Custom Services Offered

• Cut-to-size / Band-saw / Abrasive cut​ — bar, billet, plate (minimal HAZ)

• Rough machining / Pre-machining​ — forging pre-forms to near-net shape (reduce customer scrap & tool wear)

• Centerless grinding / Polish​ — precision ground bar to h7/h9/tolerance

• Third-party inspection attendance​ — SGS, TÜV, BV, Lloyd's as requested

• Export Packing​ — VCI paper + polyethylene wrap + wooden crate / pallet (seaworthy / airworthy)

8. Request a Quote

Shanghai COCESS Special Alloys Co., Ltd. maintains rotating stock of Nimonic 90 (UNS N07090 / W.Nr. 2.4632) in round bar, forging billet/block, and spring wire for quick shipment worldwide. For project pricing, availability check, legacy engine MRO cross-reference, or technical clarification (BS HR 1 / AMS 5829 compliance, double-aging parameter recommendation, Nimonic 90 ↔ Nimonic 263 ↔ Inconel 718 selection guidance), please contact our sales desk:

Shanghai COCESS Special Alloys Co., Ltd.​

Email: sales@cocessalloys.com

Web: https://en.cocessalloys.com

Add: Shanghai, China