Inconel X750 Round Bar
Inconel X750 Round Bar redefines high-stakes performance with its age-hardenable nickel-chromium alloy, engineered for sustained operation in temperatures exceeding 980°C. Combining oxidation resistance, stress rupture strength, and radiation tolerance, it is the cornerstone of mission-critical systems where failure is not an option.
Certifications & Global Standards
| Region | Compliance | Specification Code |
|---|---|---|
| USA | ASTM B637 | UNS N07750 |
| Europe | BS HR6 | NiCr15Fe7TiAl |
| Japan | JIS H4551 | NW7501 |
| Aerospace | AMS 5668 | - |
| Nuclear | ASME SB637 | Grade X750 |
Material Science at Its Peak
Alloy Composition & Functional Roles
| Element | Content | Operational Impact |
|---|---|---|
| Nickel (Ni) | ≥70% | Base matrix for thermal stability |
| Chromium (Cr) | 14.0–17.0% | Combats sulfurous oxidation |
| Titanium (Ti) | 2.25–2.75% | Enhances age-hardening response |
| Aluminum (Al) | 0.40–1.00% | Strengthens γ' precipitates |
| Iron (Fe) | 5.0–9.0% | Balances ductility and cost |
Performance Beyond Limits
Mechanical Properties (Aged Condition)
Tensile Strength: 1.240–1.380 MPa
Stress Rupture (815°C/100h): ≥170 MPa
Creep Resistance: 0.5% elongation after 1.000h at 700°C
Hardness: 35–45 HRC (Post-Aging)
Unique Physical Traits
Thermal Conductivity: 11.4 W/m·K (20–100°C)
Neutron Absorption: 1.99 barns (Critical for nuclear applications)
Magnetic Permeability: <1.01 (Fully non-magnetic after solution treatment)
5 Industrial Game-Changers
Thermal Fortitude
Retains 85% yield strength at 800°C vs. 50% for standard Inconel 600.
Radiation Armor
Withstands 10¹⁹ neutrons/cm² flux without embrittlement (ASME III qualified).
Stress Relaxation Resistance
Maintains 90% spring load after 10.000h at 650°C (ASTM E328).
Corrosion Immunity
Survives 1.000h in molten salt (NaCl-KCl-MgCl₂ at 900°C).
Fabrication-Friendly
Compatible with electron beam welding and cryogenic machining.
Mission-Driven Applications
| Sector | Critical Deployments |
|---|---|
| Aerospace | Turbine rotor shafts, re-entry vehicle skins |
| Nuclear Energy | Reactor core bolts, control rod drive mechanisms |
| Oil & Gas | Downhole tool springs, sour gas valves |
| Defense | Hypersonic missile nozzles, armor plating |
| Medical | Radiation therapy collimators |
Technical Dialogue
Q1: Heat treatment protocol for optimal aging?
A: Solution anneal at 1.095°C ±15°C/2h → Air cool → Age at 705°C/20h + 620°C/20h (Per AMS 5668).
Q2: Can X750 be cold drawn for spring applications?
A: Yes—achieves 1.500 MPa ultimate strength with 15% cold reduction (surface finish Ra ≤0.8μm).
Q3: Surface finish options for radiation environments?
A: Electropolished (ASTM B912) or AlTiN-coated (HVAF spray) to reduce neutron adherence.
Q4: How does X750 compare to Inconel 718?
A: X750 offers 20% higher stress rupture strength above 700°C but requires stricter aging control.
Q5: Traceability for nuclear projects?
A: Full PMI (Positive Material Identification) with 3D grain structure mapping (EBSD reports available).
Strategic Partnership Perks
NADCAP-Certified Supply
Batch-tested for trace elements (B, Co, Cu) to nuclear-grade purity.
Custom Geometry
Diameters: 3mm–400mm | Lengths: 0.5m–15m (±0.03mm tolerance).
Nuclear Logistics
Lead-lined packaging for radioactive transit compliance (IAEA SSR-6).
Value-Added Engineering
In-house aging furnaces, ultrasonic fatigue testing (ISO 12108).
Keywords: Inconel X750 Round Bar, Age-Hardenable Superalloy, Nuclear-Grade Nickel Alloy, Aerospace Fastener Material, High-Temperature Spring Steel
