Nimonic 95 – High-Strength Gamma-Prime Superalloy Supplier of Round Bars, Forgings & Plates | Shanghai Hangbo Alloy Group
Date: 2026年7月23日 Categories: News Views: 303
By Shanghai Hangbo Alloy Group Co., Ltd. | ISO 9001:2015 Certified | Est. 2012 | Shanghai, China
Contact: sales@hangboalloy.com | hangbo@nickel-alloy.com | WhatsApp: +86 13611656360
Quick Answer: What Is Nimonic 95?
Nimonic 95 (AMS 5822 / BS HR404) is a nickel-chromium-cobalt precipitation-hardening superalloy with an elevated gamma-prime (γ′) volume fraction — approximately 35–40% — providing superior creep rupture strength to Nimonic 90 at temperatures up to 850°C (1560°F). Strengthened by a deliberate increase in aluminum + titanium content (4.3–5.9% combined Al+Ti) and high cobalt (16–21%), it is specified for gas turbine blades, discs, and rings where standard Nimonic 90 reaches its stress capability limit. Shanghai Hangbo Alloy Group supplies Nimonic 95 as round bars, forgings, and plates with full AMS 5822 certification.
Industry Pain Point: Gas turbine overhaul shops face a recurring dilemma when Nimonic 90 turbine blades show creep elongation within 15,000–20,000 hours at 800°C: either accept reduced blade life with more frequent replacement, or step up to a cobalt-base or single-crystal alloy at 5–10× the material cost. Nimonic 95 — with approximately 25–35% higher creep rupture life than Nimonic 90 at operating temperature — bridges this gap at roughly 1.3–1.5× the Nimonic 90 material cost, offering a life-extension pathway without the step-change manufacturing investment required for directional-solidification or single-crystal components.
Key Properties at a Glance
| Property | Value |
|---|---|
| Alloy Family | Ni-Cr-Co γ′ Precipitation-Hardening Superalloy |
| γ′ Volume Fraction | ~35–40% |
| Density | 8.18 g/cm³ (0.296 lb/in³) |
| Melting Range | 1290–1360°C (2350–2480°F) |
| γ′ Solvus Temperature | ~980–1020°C |
| Max Service Temp. | ~850°C (~1560°F) |
| Tensile Strength (RT, Aged) | ≥ 1100 MPa (≥ 160 ksi) |
| Yield Strength (RT, Aged) | ≥ 700 MPa (≥ 102 ksi) |
| Elongation (RT, Aged) | ≥ 10% |
| 100 h Creep Rupture at 815°C | ~150 MPa |
| Key Standards | AMS 5822, BS HR404 |
Product Overview
Nimonic 95 occupies the upper tier of wrought precipitation-hardening nickel superalloys between Nimonic 90 (the workhorse turbine blade alloy) and the vacuum-melted, heavily alloyed Nimonic 105/115 grades used for the hottest turbine sections. Its defining metallurgical strategy is straightforward: increase the gamma-prime (γ′) volume fraction by raising the total aluminum-plus-titanium content to 4.3–5.9%, and raise the γ′ solvus temperature with high cobalt (16–21%), creating an alloy that retains precipitation strengthening to higher temperatures than Nimonic 90.
The γ′ phase — coherent, ordered Ni₃(Al,Ti) precipitates with the L1₂ crystal structure — is the engine of high-temperature strength in all Nimonic alloys. These precipitates impede dislocation motion through the "order hardening" mechanism: a moving dislocation must create an antiphase boundary (APB) as it cuts through each γ′ particle, requiring additional energy proportional to the APB energy and the particle size. At 800°C, the γ′ particles in Nimonic 95 are approximately 30–80 nm in diameter — the optimum size range for maximum strengthening in this alloy system.
Three compositional decisions distinguish Nimonic 95 from Nimonic 90:
- Elevated Al+Ti (4.3–5.9% vs. 2.8–4.4% for Nimonic 90): More γ′ formers = more γ′ volume fraction = higher strength at temperature. The Al:Ti ratio is approximately 0.6–0.8, producing γ′ with a composition near Ni₃(Al₀.₄Ti₀.₆) — titanium-rich γ′ has higher APB energy than aluminum-rich γ′, providing stronger dislocation pinning.
- High Cobalt (16–21%): Cobalt dissolves primarily in the γ matrix (FCC nickel solid solution), where it raises the stacking-fault energy and, critically, increases the γ′ solvus temperature by 15–25°C per weight percent cobalt. This means the γ′ precipitates in Nimonic 95 dissolve at approximately 980–1020°C vs. 940–980°C for Nimonic 90 — extending the useful precipitation-strengthened temperature range.
- Controlled C + Zr (0.08–0.15% C, ≤0.10% Zr): These elements segregate to grain boundaries and form discrete M₂₃C₆ carbides that prevent grain-boundary sliding — the dominant creep mechanism in polycrystalline alloys above 700°C. Without grain-boundary carbides, Nimonic 95 would exhibit excellent short-term tensile properties but poor creep rupture life.
Shanghai Hangbo Alloy Group supplies Nimonic 95 in the solution-annealed condition for customer aging after machining, or fully heat-treated (solution + aged) with certified mechanical properties.
Executive Standards
| Product Form | Primary Standard | Supplementary | Notes |
|---|---|---|---|
| Bar & Forging Stock | AMS 5822 | BS HR404 | Solution-annealed or fully heat-treated |
| Disc Forgings | AMS 5822 | BS HR404 | Ultrasonic inspected per AMS-STD-2154 Class A |
| Ring Forgings | AMS 5822 | — | Rolled-ring or open-die forged |
| Blade Forgings | AMS 5822 | Customer-specific specification | Near-net-shape forging |
| Plate & Sheet | BS HR404 / Custom | — | Limited availability — forgings are primary product form |
| Welding Filler | AMS 5821 (matching) | — | For repair welding only |
Chemical Composition (wt.% per AMS 5822 – 100% OES Verified)
| Element | Min | Max | Role in Nimonic 95 |
|---|---|---|---|
| Nickel (Ni) | Balance | — | FCC γ matrix; coherent with γ′ (both are FCC) |
| Chromium (Cr) | 19.0 | 21.0 | Solid-solution strengthener; provides oxidation and hot-corrosion resistance to ~850°C |
| Cobalt (Co) | 16.0 | 21.0 | Critical — raises γ′ solvus by 15–25°C per wt% Co; increases APB energy of γ′; improves hot-corrosion resistance |
| Titanium (Ti) | 2.5 | 3.5 | γ′ former (Ni₃Ti); higher Ti γ′ has higher APB energy than Al γ′ → stronger dislocation pinning |
| Aluminum (Al) | 1.8 | 2.4 | γ′ former (Ni₃Al); provides oxidation resistance at the γ′/matrix interface; stabilizes γ′ against coarsening |
| Total Al+Ti | 4.3 | 5.9 | Key metric — determines γ′ volume fraction (~35–40%) |
| Iron (Fe) | — | 5.0 | Incidental; kept low to avoid Laves phase and sigma-phase formation |
| Carbon (C) | 0.08 | 0.15 | Forms grain-boundary M₂₃C₆ carbides; prevents grain-boundary sliding in creep |
| Silicon (Si) | — | 1.0 | Deoxidizer |
| Manganese (Mn) | — | 1.0 | Deoxidizer |
| Boron (B) | — | 0.010 | Grain-boundary segregant; improves creep ductility by strengthening boundaries |
| Zirconium (Zr) | — | 0.10 | Refines grain-boundary carbide morphology; improves hot workability |
| Copper (Cu) | — | 0.15 | Impurity |
| Sulfur (S) | — | 0.015 | Minimized for hot workability and fatigue life |
Mechanical & Physical Properties
Room-Temperature Properties (Solution-Annealed + Aged — 1080–1120°C/AC + 700–750°C/16 h/AC)
| Property | Value | Standard |
|---|---|---|
| Tensile Strength (Rm) | ≥ 1100 MPa (≥ 160 ksi) | AMS 5822 |
| Yield Strength 0.2% (Rp0.2) | ≥ 700 MPa (≥ 102 ksi) | AMS 5822 |
| Elongation (A5, 4D) | ≥ 10% | AMS 5822 |
| Hardness | 32–42 HRC | — |
| Young's Modulus (20°C) | ~215 GPa (31.2 × 10³ ksi) | — |
Elevated-Temperature Properties (Fully Heat-Treated, Typical)
| Temperature | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 20°C | 1200 | 780 | 15 |
| 500°C (932°F) | 1050 | 680 | 14 |
| 700°C (1292°F) | 820 | 580 | 12 |
| 815°C (1499°F) | 520 | 400 | 15 |
| 850°C (1562°F) | 380 | 300 | 18 |
Key observation: The strength retention at 700–815°C is a direct consequence of the high γ′ solvus temperature (~980°C). The γ′ precipitates remain coherent and ordered well into this temperature range, while in Nimonic 90 (γ′ solvus ~940–980°C), γ′ coarsening and dissolution begin to accelerate above ~780°C.
Creep Rupture Properties (Fully Heat-Treated)
| Temperature | Stress for 100 h Rupture | Stress for 1,000 h Rupture | Unit |
|---|---|---|---|
| 700°C (1292°F) | ~450 | ~320 | MPa |
| 750°C (1382°F) | ~290 | ~190 | MPa |
| 815°C (1499°F) | ~150 | ~80 | MPa |
| 850°C (1562°F) | ~80 | ~40 | MPa |
Physical Properties
| Property | at 20°C | at 500°C | at 700°C | at 800°C | Unit |
|---|---|---|---|---|---|
| Density | 8.18 | — | — | — | g/cm³ |
| Thermal Conductivity | 11.5 | 15.5 | 19.0 | 20.5 | W/m·K |
| Specific Heat | 420 | 490 | 540 | 560 | J/kg·K |
| Electrical Resistivity | ~1.25 | — | — | — | μΩ·m |
| Mean Thermal Expansion (20°C–T) | — | 12.5 | 13.8 | 14.5 | μm/m·°C |
| Young's Modulus | 215 | 190 | 170 | 160 | GPa |
Heat Treatment
Full Heat Treatment Schedule (AMS 5822)
Step 1 — Solution Annealing:
| Parameter | Specification |
|---|---|
| Temperature | 1080–1120°C (1975–2050°F) |
| Soak Time | 1–4 hours depending on section thickness (minimum 1 h for ≤ 25 mm; +0.5 h per 25 mm above) |
| Cooling | Air cool or oil quench. Oil quench preferred for sections ≥ 50 mm to suppress grain-boundary carbide precipitation on cooling. |
Metallurgical objective: Dissolve all γ′ precipitates, carbide networks, and hot-working substructure. The solution temperature must be above the γ′ solvus (~980–1020°C) but below the alloy's incipient melting point (~1240–1260°C). The 1080°C lower bound provides ~60°C margin above the γ′ solvus; the 1120°C upper bound prevents excessive grain growth (target grain size ASTM 3–6).
Step 2 — Precipitation Aging:
| Parameter | Specification |
|---|---|
| Temperature | 700–750°C (1290–1380°F) |
| Soak Time | 16 hours |
| Cooling | Air cool |
Alternative two-step aging for optimized creep resistance:
- Step 2a: 840°C (1545°F) / 4 hours / air cool (stabilizes grain-boundary carbides; pre-coarsens γ′ to bimodal distribution)
- Step 2b: 700°C (1290°F) / 16 hours / air cool (precipitates fine secondary γ′ for maximum strength)
Metallurgical objective: Precipitate fine, coherent γ′ particles (target diameter 30–80 nm) uniformly throughout the γ matrix. The aging temperature determines γ′ size; the aging time determines γ′ volume fraction. The 700–750°C single-step age produces a unimodal γ′ distribution optimized for tensile and fatigue strength. The two-step age produces a bimodal γ′ distribution (coarse primary + fine secondary) optimized for creep rupture life.
Production Process
1. Round Bars & Forgings
- Melting: VIM (Vacuum Induction Melting) followed by ESR (Electroslag Remelting) is mandatory. The VIM primary melt provides precise control of the reactive elements aluminum and titanium (±0.05% of target). The ESR remelt removes oxide inclusions that would nucleate fatigue cracks and refines the solidification structure. Air-melt or AOD-only material is categorically unacceptable for rotating turbine components.
- Hot Forging: ESR ingot homogenized at 1150–1180°C for 12–24 hours to dissolve the as-cast γ/γ′ eutectic. Hot-forged to billet or bar with minimum reduction ratio 4:1. Forging temperature 1080–1150°C; finishing temperature ≥ 980°C. Below 980°C, γ′ precipitation during deformation causes edge cracking.
- Solution Annealing: 1080–1120°C, air cool or oil quench. Digital furnace chart archived. Hardness check (HRC) — annealed hardness should be ≤ 32 HRC; higher hardness indicates incomplete γ′ dissolution and requires re-solution treatment.
- Ultrasonic Testing & Finishing: 100% ultrasonic immersion testing per AMS-STD-2154 Class A (the aerospace turbine disc standard). Surface finish ≤ 3.2 μm Ra for fatigue-critical applications. Magnetic particle inspection (MPI) for surface defects on finished forgings.
2. Turbine Disc & Ring Forgings
- Upset Forging: ESR ingot upset-forged to pancake at 1080–1150°C. Controlled strain distribution to ensure uniform grain refinement from center to rim.
- Ring Rolling: For ring forgings, the upset pancake is pierced and ring-rolled to final dimensions. Multi-directional deformation ensures isotropic properties — critical for rotating components where radial and tangential stresses differ.
- Solution Anneal + Quench: 1080–1120°C, oil quench. Oil quench is specified over air cool for section thickness ≥ 50 mm — the faster cooling suppresses grain-boundary carbide film formation that would reduce creep ductility.
- Aging: 700–750°C / 16 h / air cool, or two-step age per customer specification. Post-age hardness and tensile verification on a prolongation from the forging.
3. Plate & Sheet
- Hot Rolling: Hot-forged slab reheated to 1100–1150°C, multi-pass hot rolling with finishing temperature ≥ 980°C. Hot-rolled plate typically 5–30 mm thickness.
- Cold Rolling (Sheet): Hot-rolled strip solution-annealed (1080–1120°C, AC) then cold-rolled with intermediate anneals. Final cold reduction controlled to achieve grain size specification.
- Solution Anneal + Aging: 1080–1120°C, AC + 700–750°C / 16 h / AC. Flatness correction after aging.
- NDE & Certification: Ultrasonic inspection, dimensional verification, tensile testing on sample coupons per heat-treatment lot.
Industry Applications
| Industry | Typical Component | Why Nimonic 95? |
|---|---|---|
| Aero Gas Turbines | Turbine blades (stages 2–3), turbine discs, compressor rear-stage discs, afterburner flame-holder rings | γ′ volume fraction ~35–40% provides ~25% higher creep life than Nimonic 90 at 800°C; lower cost than DS/single-crystal materials |
| Industrial Gas Turbines | Power turbine blades, nozzle guide vanes, shroud segments | Long-term microstructural stability at 700–800°C for 50,000+ hour service intervals |
| High-Temperature Fasteners | Turbine casing bolts, exhaust manifold studs, flange bolts in hot sections | Strength retention to 750°C; stress relaxation resistance from γ′ pinning of mobile dislocations |
| Automotive Turbocharger | Turbine wheel forgings, wastegate valve spindles | Temperature capability to 850°C covers gasoline and diesel turbocharger turbine inlet conditions |
| Nuclear — Gas-Cooled Reactors | Core support components, control rod drive mechanisms | Oxidation resistance + creep strength in helium/CO₂ at 700–800°C |
| Hot Forming Tooling | Extrusion dies, hot-shear blades, forging press tooling | Retains hardness (≥30 HRC) and wear resistance at working temperatures of 750–800°C |
Quality Assurance: 7-Stage Zero-Defect Inspection
- Raw Material & Melt Chemistry: Incoming electrolytic nickel, chromium, cobalt, titanium, and aluminum analyzed by ICP-OES. VIM melt chemistry verified — Al and Ti ±0.05% of target. Carbon content verified by combustion analysis. Atmospheric gases (O₂, N₂) ≤ 50 ppm combined.
- ESR Ingot Soundness: ESR ingot 100% ultrasonic tested for centerline porosity and "freckle" segregation (niobium-free alloy, so freckles are chromium/cobalt segregation). Macro-etch cross-section examined for grain structure and segregation pattern.
- Hot Working Verification: All forging and rolling operations monitored by infrared pyrometry. Reduction ratio verified ≥ 4:1 for each step. Processing charts archived per heat number and forging lot.
- Solution Annealing Integrity: Digital furnace chart ±5°C accuracy. Rapid hardness screening on every annealed lot — hardness > 32 HRC indicates incomplete γ′ dissolution and triggers re-solution treatment with microstructural examination.
- Age Hardening Verification: Aged hardness ≥ 32 HRC confirms γ′ precipitation response. Aged tensile coupon testing per heat-treatment lot per AMS 5822. Any lot failing tensile minimums is re-solution-treated and re-aged once; second failure triggers metallurgical root-cause analysis (γ′ volume fraction by quantitative metallography, grain size, carbide morphology).
- Non-Destructive Examination: 100% ultrasonic immersion testing per AMS-STD-2154 Class A for disc forgings; contact UT per ASTM A388 for bars ≥ Ø50 mm. 100% MPI (wet fluorescent method) for surface-breaking defects. PMI on every finished piece.
- Documentation & Release: EN 10204 Type 3.1 or AS9100-compliant certificate with full chemistry, solution + aging parameters, tensile results, hardness, grain size, ultrasonic and MPI results. Third-party inspection by SGS, Bureau Veritas, or NADCAP-accredited agencies available.
Frequently Asked Questions
Q1: What is Nimonic 95 used for?
Nimonic 95 is used for gas turbine blades, discs, and rings operating at 700–850°C — the temperature window where Nimonic 90 reaches its stress-capability limit but the application does not justify the cost of directionally-solidified or single-crystal blade materials. It is also used for high-temperature fasteners (turbine casing bolts), turbocharger turbine wheels, nuclear gas-cooled reactor core supports, and hot-forming tooling where hardness must be retained to 800°C.
Q2: What is the density of Nimonic 95?
8.18 g/cm³ (0.296 lb/in³) at 20°C — approximately 3% lower than Nimonic 90 (8.27 g/cm³) due to slightly lower chromium and higher aluminum content. Weight estimation for rotating components: Mass (kg) = 8.18 × Volume (cm³) ÷ 1000.
Q3: What is the maximum service temperature of Nimonic 95?
Approximately 850°C (1560°F). The limiting factor is the γ′ solvus temperature — approximately 980–1020°C nominally, but γ′ coarsening accelerates exponentially above 850°C in service. Coarsening follows Ostwald ripening kinetics (d³ ∝ t), meaning a 50°C temperature increase reduces the time to γ′ overaging by a factor of approximately 3–5×. For turbine blade applications, 850°C is the practical ceiling; for lower-stress structural components, brief excursions to 900°C are tolerable.
Q4: What is the melting point of Nimonic 95?
The melting range is approximately 1290–1360°C (2350–2480°F). The 70°C melting range is typical of multi-component nickel superalloys. The solidus temperature (~1290°C) determines the maximum safe solution annealing temperature (1120°C) — a ~170°C margin is maintained to avoid any risk of incipient melting (liquation) at grain boundaries, which would catastrophically reduce mechanical properties.
Q5: What is the tensile strength of Nimonic 95?
In the fully heat-treated condition (solution + aged): minimum ≥ 1100 MPa (≥ 160 ksi) at room temperature per AMS 5822, with typical values of 1150–1250 MPa. At 815°C, tensile strength is approximately 520 MPa. The room-temperature strength is approximately 15–20% higher than Nimonic 90 (≥ 930 MPa), directly reflecting the higher γ′ volume fraction.
Q6: What is the yield strength of Nimonic 95?
Minimum ≥ 700 MPa (≥ 102 ksi) at room temperature, with typical values of 750–820 MPa. At 700°C, yield strength is approximately 580 MPa; at 815°C, approximately 400 MPa. The yield strength anomaly — where yield strength remains high to ~700°C before dropping — is characteristic of γ′-strengthened superalloys where the dislocation-γ′ interaction mechanism transitions from particle cutting (low temperature) to Orowan bowing/bypass (high temperature).
Q7: What is the elongation of Nimonic 95?
Minimum ≥ 10% in the fully heat-treated condition per AMS 5822, with typical values of 12–18%. This is lower than Nimonic 90 (≥ 15%) and reflects the higher γ′ volume fraction — more precipitate = less deformable matrix volume = lower ductility. The tensile-to-elongation trade-off is an inherent characteristic of precipitation-hardening alloys; optimizing both simultaneously requires precise control of γ′ size distribution through multi-step aging.
Q8: What are the full mechanical properties of Nimonic 95?
Fully heat-treated per AMS 5822: tensile ≥ 1100 MPa, yield ≥ 700 MPa, elongation ≥ 10%, hardness 32–42 HRC at room temperature. At 815°C: tensile ~520 MPa, yield ~400 MPa, elongation ~15%. Creep rupture at 815°C: ~150 MPa for 100 h, ~80 MPa for 1,000 h. These properties reflect a γ′ volume fraction of ~35–40% with precipitate size 30–80 nm in the optimum aged condition.
Q9: What heat treatment does Nimonic 95 require?
A two-step heat treatment: (1) Solution annealing at 1080–1120°C (1975–2050°F) for 1–4 hours followed by air cooling or oil quenching, then (2) Precipitation aging at 700–750°C (1290–1380°F) for 16 hours followed by air cooling. An alternative two-step aging schedule — 840°C/4 h/AC + 700°C/16 h/AC — produces a bimodal γ′ distribution optimized for creep rupture life. The solution anneal must be above the γ′ solvus (~980–1020°C) to fully dissolve all γ′; the aging temperature determines precipitate size and distribution.
Q10: What is the solution annealing temperature for Nimonic 95?
1080–1120°C (1975–2050°F) — approximately 60–140°C above the γ′ solvus temperature. The lower bound (1080°C) provides adequate margin for complete γ′ dissolution; the upper bound (1120°C) is limited by grain growth control and avoidance of incipient melting. This is approximately 30–50°C higher than the typical Nimonic 90 solution temperature (1040–1080°C) because Nimonic 95 has a higher γ′ solvus (980–1020°C vs. 940–980°C for Nimonic 90) due to the higher cobalt content.
Q11: How does Nimonic 95 compare to Nimonic 90?
| Property | Nimonic 95 | Nimonic 90 | Difference |
|---|---|---|---|
| Total Al+Ti | 4.3–5.9% | 2.8–4.4% | +53% more γ′ formers |
| γ′ Volume Fraction | ~35–40% | ~20–25% | ~60% higher |
| Cobalt Content | 16–21% | 15–21% | Similar (slightly higher minimum) |
| γ′ Solvus Temp. | ~980–1020°C | ~940–980°C | +40°C |
| Max Service Temp. | ~850°C | ~815°C | +35°C |
| Tensile Strength (RT, Aged) | ≥ 1100 MPa | ≥ 930 MPa | +18% |
| 100 h Creep Rupture at 815°C | ~150 MPa | ~110 MPa | +36% |
| Elongation (RT, Aged) | ≥ 10% | ≥ 15% | Nimonic 90 more ductile |
| Cost Premium | 1.3–1.5× | Baseline | — |
Decision rule: If the application requires more than ~110 MPa creep rupture stress at 815°C, or the design life exceeds 20,000 hours at 800°C, upgrade from Nimonic 90 to Nimonic 95. If operating temperature is below 750°C and stress is moderate, Nimonic 90 remains the more cost-effective and more widely available choice.
Q12: What is the price of Nimonic 95 per kg?
Indicative EXW pricing for Nimonic 95 round bars is \$45–75/kg, with forged discs 25–50% higher depending on complexity and NDE requirements. The premium over Nimonic 90 (typically \$35–55/kg) reflects the higher cobalt and titanium content, the mandatory VIM+ESR melting route, and the smaller production volumes. Shanghai Hangbo Alloy Group provides firm quotations within 2 business hours — email sales@hangboalloy.com with your product form, dimensions, quantity, and heat treatment condition (solution-annealed or fully heat-treated).
Q13: Is Nimonic 95 weldable?
Yes, but only for repair, not for primary fabrication of rotating components. GTAW (TIG) with matching filler metal (AMS 5821 / Nimonic 95 composition) is the standard repair method. The component must be in the solution-annealed condition (not aged) before welding to prevent heat-affected zone (HAZ) liquation cracking at γ′ particles. Post-weld heat treatment: full re-solution-anneal (1080–1120°C) + re-age (700–750°C/16 h). Weld repair is limited to non-fatigue-critical regions of turbine blades (tip restoration, leading-edge erosion repair) and is prohibited in disc bores and other high-stress locations per engine OEM repair manuals.
Q14: What product forms does Shanghai Hangbo supply for Nimonic 95?
We supply Nimonic 95 in round bars (Ø10–300 mm, forged or hot-rolled, solution-annealed or fully heat-treated), forgings (discs, rings, blocks — our primary product form for turbine applications), plates (5–30 mm, hot-rolled), and billets (for customer forging operations). Bars and forgings are available in the solution-annealed condition for customer aging after machining, or fully heat-treated with certified mechanical properties per AMS 5822.
Q15: Does Shanghai Hangbo ship Nimonic 95 internationally?
Yes. We export Nimonic 95 to over 40 countries with terms FOB Shanghai, CIF, CFR, and DAP. Standard destinations include USA, UK, Germany, Italy, Japan, South Korea, and Singapore. Aerospace-grade shipments include full material traceability per AS9100 requirements. Stock availability is limited due to the specialized nature of the alloy — most orders are mill-production with lead times of 12–16 weeks for VIM+ESR melting, forging, heat treatment, and NDE. Rush orders (8–10 weeks) available with premium scheduling.
Q16: What is the difference between Nimonic 95 and Nimonic 105?
| Property | Nimonic 95 | Nimonic 105 | Selection |
|---|---|---|---|
| Total Al+Ti | 4.3–5.9% | 6.0–7.5% | 105 has ~30% more γ′ formers |
| γ′ Volume Fraction | ~35–40% | ~45–50% | 105 is the next step in γ′ content |
| Max Service Temp. | ~850°C | ~950°C | 105 for higher temperatures |
| Density | 8.18 g/cm³ | 8.01 g/cm³ | 105 is lighter (more Al) |
| Cost Premium | 1.3–1.5× Nimonic 90 | 2.0–2.5× Nimonic 90 | 105 is more expensive |
| Availability | Moderate | Limited | 95 is more readily available |
Nimonic 105 is the next tier up — higher γ′ volume fraction, higher temperature capability, and correspondingly higher cost. Nimonic 95 occupies the sweet spot where Nimonic 90 is insufficient but the budget or manufacturing constraint does not justify the full step to Nimonic 105.
Q17: Why is cobalt so important in Nimonic 95?
Cobalt at 16–21% serves two critical functions that cannot be replicated by any other alloying element at comparable cost. First, cobalt dissolves in the γ (FCC nickel) matrix and raises the γ′ solvus temperature by approximately 15–25°C per weight percent — directly extending the temperature range over which precipitation strengthening remains effective. Second, cobalt increases the stacking-fault energy of the γ matrix, which suppresses cross-slip of dislocations at high temperatures. This improves creep resistance because cross-slip is the mechanism by which dislocations circumvent γ′ precipitates. Without cobalt, Nimonic 95 would have the same Al+Ti content but a γ′ solvus ~60–80°C lower, collapsing its high-temperature advantage to near-zero.
Contact Shanghai Hangbo Alloy Group
| Channel | Details |
|---|---|
| Company | Shanghai Hangbo Alloy Group Co., Ltd. (宝昭实业（上海）有限公司) |
| Website | www.nickel-alloy.com |
| Email (Sales) | sales@hangboalloy.com |
| Email (Technical) | hangbo@nickel-alloy.com |
| +86 13611656360 | |
| Skype | live:specialalloy001 |
| Address | Room 1508, No. 288 Shiyi Road, Baoshan District, Shanghai 200940, China |
| ISO Certification | ISO 9001:2015 — View certificate on request |
| Response Time | ≤ 10 minutes during business hours (Mon–Fri, 08:00–18:00 GMT+8) |
Your Next Step
Email sales@hangboalloy.com with your Nimonic 95 specification:
- Product form: Bar / Forging / Plate
- Dimensions: Diameter × length or forging drawing reference
- Heat treatment condition: Solution-annealed (for customer aging) or fully heat-treated per AMS 5822
- NDE requirements: Standard UT per ASTM A388 / AMS-STD-2154 Class A / additional requirements
- Delivery destination: Full address + preferred incoterm (FOB / CIF / DAP)
For turbine overhaul programs, our technical team can review your blade retirement-for-cause data and provide a Nimonic 95 upgrade feasibility assessment including fatigue life re-analysis.
