Aperam Superimphy 750 Bar-Corrosion，1

### **Product Introduction: Aperam Superimphy® 750 Bar - Precipitation-Hardenable Nickel Alloy** **Overview** Aperam Superimphy® 750 Bar is a precipitation-hardenable nickel-chromium alloy renowned for its exceptional combination of high strength, excellent corrosion resistance, and outstanding thermal stability. This age-hardenable superalloy maintains superior mechanical properties at temperatures up to 700°C (1300°F) and offers good resistance to oxidation and corrosion across a wide range of environments. Its unique strengthening mechanism through gamma prime (γ') precipitation makes it ideal for high-stress applications in aerospace, power generation, and chemical processing industries. --- #### **Chemical Composition (Typical % by Weight)** | Element | Content (%) | Role & Benefit | |---------|-------------|---------------| | **Nickel (Ni)** | 70.0 min | Forms austenitic matrix and provides corrosion resistance base | | **Chromium (Cr)** | 14.0 - 17.0 | Confers oxidation resistance and corrosion protection | | **Iron (Fe)** | 5.0 - 9.0 | Balances microstructure and cost-effectiveness | | **Titanium (Ti)** | 2.25 - 2.75 | Primary precipitation hardener through γ' formation (Ni₃Ti) | | **Aluminum (Al)** | 0.40 - 1.00 | Secondary precipitation hardener and oxidation resistance | | **Niobium (Nb)** | 0.70 - 1.20 | Enhances precipitation hardening and stability | | **Cobalt (Co)** | ≤1.00 | Solid solution strengthener | | **Carbon (C)** | ≤0.08 | Controlled for carbide formation | | **Copper (Cu)** | ≤0.50 | Residual element control | | **Manganese (Mn)** | ≤1.00 | Improves manufacturability | | **Silicon (Si)** | ≤0.50 | Process control element | | **Sulfur (S)** | ≤0.01 | Minimized for improved properties | *Note: Superimphy is a registered trademark of Aperam. This alloy corresponds to UNS N07750/W.Nr. 2.4669.* --- #### **Physical & Mechanical Properties** **Physical Properties:** - Density: 8.25 g/cm³ (0.298 lb/in³) - Melting Range: 1390-1425°C (2534-2597°F) - Thermal Expansion: 13.9 μm/m·°C @ 20-100°C - Thermal Conductivity: 19.5 W/m·K @ 100°C - Modulus of Elasticity: 214 GPa (31.0 x 10⁶ psi) - Magnetic Permeability: Essentially non-magnetic **Mechanical Properties (Aged Condition - Room Temperature):** - Tensile Strength: 1030-1240 MPa (150-180 ksi) - Yield Strength (0.2% Offset): 690-965 MPa (100-140 ksi) - Elongation: 15-25% - Reduction of Area: 20-30% - Hardness: HRC 28-35 **Elevated Temperature Properties:** - Maintains yield strength > 620 MPa (90 ksi) at 540°C (1000°F) - Good creep rupture strength up to 700°C (1300°F) --- #### **International Standards and Specifications** - **ASTM B637:** Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock - **AMS 5667:** Aerospace Material Specification for Bar and Forging - **ASME SB-637:** Pressure vessel applications - **EN 2.4669:** European material designation - **AMS 5542:** Sheet, Strip, and Plate - **GE S-500:** General Electric specification - **P&W CS-3000:** Pratt & Whitney specification --- #### **Product Applications** **Aerospace Industry:** - Gas turbine engine components - Turbine blades and disks - Compressor parts and rings - Afterburner components - Aircraft structural components **Power Generation:** - Gas turbine components - Steam turbine parts - Nuclear reactor components - High-temperature fasteners and bolts - Turbine wheel seals **Chemical Processing:** - High-strength fasteners and bolts - Valve components in corrosive service - Pump shafts and impellers - Reactor internal components **Other Applications:** - High-temperature springs - Forming tools and dies - Medical implants and instruments - Oil and gas downhole tools --- #### **Key Advantages** 1. **High Strength-to-Weight Ratio**: Exceptional mechanical properties with moderate density 2. **Excellent Thermal Stability**: Maintains properties at elevated temperatures up to 700°C 3. **Good Corrosion Resistance**: Performs well in various corrosive environments 4. **Superior Fatigue Resistance**: Excellent resistance to cyclic loading conditions 5. **Age-Hardenable**: Can be heat treated to achieve desired strength levels 6. **Good Fabricability**: Can be machined and formed using standard methods 7. **Oxidation Resistance**: Performs well in oxidizing atmospheres at high temperatures --- **Conclusion** Aperam Superimphy® 750 Bar represents a premium precipitation-hardenable nickel alloy that delivers an outstanding balance of high strength, corrosion resistance, and thermal stability. Its sophisticated age-hardening mechanism, combined with excellent mechanical properties across a wide temperature range, makes it an ideal choice for the most demanding applications in aerospace, power generation, and chemical processing industries. Supported by comprehensive international standards and rigorous quality certifications, Superimphy 750 Bar continues to be the material of choice for critical components where reliability, performance, and long-term durability are essential in challenging operational environments.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3423 gallon liquid totes Special package is available on request.