Alloy 725，Inconel 725 Other/Similar Specs，UNS N07725，EFORU

British Specs:，American Specs:ASTM B805，German Specs:

### **Product Introduction: Alloy 725 / Inconel 725 - Other Product Forms & Specifications (UNS N07725)** #### **Overview** **Alloy 725** (commercially known as **Inconel® 725**) encompasses a diverse range of specialized product forms beyond standard bars, sheets, and forgings. These "other" specifications include customized shapes, semi-finished products, and specialized configurations tailored for specific industrial applications. These variants maintain the alloy's fundamental characteristics - exceptional corrosion resistance in sour gas (H₂S-containing) environments, high strength up to 650°C (1200°F), and excellent fabricability - while offering unique advantages for specialized applications in oil and gas, chemical processing, and marine industries. The versatility of Alloy 725 allows for numerous specialized product forms, each engineered to meet specific performance requirements while maintaining the alloy's signature precipitation-hardening capability through gamma double prime [γ''] phase formation. --- #### **Chemical Composition** The chemical composition remains consistent across all special product forms: | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 55.0 - 59.0 | | **Chromium (Cr)** | 19.0 - 22.5 | | **Molybdenum (Mo)** | 7.0 - 9.5 | | **Iron (Fe)** | 5.0 - 9.0 | | **Niobium (Nb)** | 2.75 - 4.00 | | **Titanium (Ti)** | 1.0 - 1.7 | | **Aluminum (Al)** | 0.35 - 0.75 | | **Manganese (Mn)** | ≤ 0.35 | | **Silicon (Si)** | ≤ 0.20 | | **Carbon (C)** | ≤ 0.03 | | **Sulfur (S)** | ≤ 0.010 | | **Copper (Cu)** | ≤ 0.20 | | **Phosphorus (P)** | ≤ 0.015 | --- #### **Physical Properties** Consistent physical properties across all product forms: | Property | Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 8.31 g/cm³ | 0.300 lb/in³ | | **Melting Range** | 1320 - 1360 °C | 2410 - 2480 °F | | **Specific Heat (20°C)** | 442 J/kg·K | 0.106 Btu/lb·°F | | **Thermal Conductivity (20°C)** | 10.8 W/m·K | 75.0 Btu·in/hr·ft²·°F | | **Thermal Expansion Coefficient (20-100°C)** | 12.9 μm/m·°C | 7.2 μin/in·°F | | **Modulus of Elasticity** | 206 GPa | 29.9 x 10⁶ psi | --- #### **Specialized Product Forms & Applications** **1. Custom Extrusions** * **Forms:** Complex cross-sectional profiles, structural shapes, channels * **Applications:** Chemical process equipment frames, structural supports for corrosive environments * **Standards:** ASTM B864, Customer-specific specifications * **Features:** Consistent grain flow, improved mechanical properties **2. Billets & Blooms** * **Forms:** Semi-finished products for further processing * **Applications:** Forging stock, remelting electrodes, machining blanks * **Standards:** ASTM B805, Customer specifications * **Features:** Uniform microstructure, optimized for subsequent processing **3. Precision Castings** * **Forms:** Investment cast components, lost-wax castings * **Applications:** Complex valve bodies, pump components, turbine parts * **Standards:** ASTM A494, Customer specifications * **Features:** Complex geometries, reduced machining requirements **4. Powder Metallurgy Products** * **Forms:** Metal powder for additive manufacturing, hot isostatic pressing * **Applications:** 3D printed components, HIP consolidated parts for corrosive service * **Standards:** ASTM F3055, Customer specifications * **Features:** Fine microstructure, isotropic properties **5. Clad Products** * **Forms:** Explosion-bonded clad plates, roll-bonded clad sheets * **Applications:** Pressure vessels, chemical reactors, transition joints * **Standards:** ASTM B898, ASME SA264 * **Features:** Cost-effective corrosion protection **6. Special Fasteners** * **Forms:** Custom bolts, nuts, washers, special threaded components * **Applications:** High-strength fasteners for sour service applications * **Standards:** ASTM F593, NACE MR0175 compliant * **Features:** High strength and corrosion resistance --- #### **International Standards** Comprehensive standards covering specialized product forms: **ASTM Standards:** * **ASTM B366:** Factory-Made Wrought Nickel and Nickel Alloy Fittings * **ASTM B462:** Forged or Rolled Nickel Alloy Pipe Flanges * **ASTM B472:** Nickel Alloy Billets and Bars for Reforging **NACE Standards:** * **NACE MR0175/ISO 15156:** Materials for use in H₂S-containing environments * **NACE MR0103:** Resistance to sulfide stress cracking **International Standards:** * **ISO 9724:** Nickel and Nickel Alloy Forgings * **DIN 17752:** Wrought Nickel and Nickel Alloys * **GB/T 15007:** Chinese Standard for Corrosion Resistant Alloys --- #### **Special Applications** **Additive Manufacturing:** * **Forms:** Powder for SLM, EBM, DED processes * **Applications:** Complex corrosion-resistant components, custom parts * **Advantages:** Design freedom, reduced material waste * **Standards:** ASTM F3055, AMS 4999 **Thermal Spray Powders:** * **Forms:** Spherical powder for coating applications * **Applications:** Corrosion-resistant coatings, wear protection * **Standards:** ASTM F3056 * **Features:** Uniform particle size distribution **Composite Materials:** * **Forms:** Metal matrix composites, reinforced structures * **Applications:** High-stiffness components, specialized wear parts * **Features:** Enhanced specific strength and stiffness **Special Wire Forms:** * **Forms:** Welding wire, spring wire, fastener wire * **Applications:** High-corrosion resistance springs, welding consumables * **Standards:** AWS A5.14, Customer specifications --- #### **Key Advantages of Specialized Forms** * **Design Flexibility:** Custom shapes and configurations for specific applications * **Cost Efficiency:** Reduced machining and material waste * **Performance Optimization:** Tailored microstructures and properties * **Manufacturing Efficiency:** Near-net-shape production capabilities * **Quality Consistency:** Controlled processes ensuring reliability * **Corrosion Resistance:** Maintains excellent performance in sour service environments **Quality Assurance Requirements:** * **Material Traceability:** Complete documentation from melt to final product * **Non-Destructive Testing:** UT, RT, PT, MT as required * **Metallurgical Analysis:** Grain size, phase identification, inclusion rating * **Corrosion Testing:** NACE TM0177, ASTM G48 testing **Heat Treatment Specifications:** * **Solution Treatment:** 980-1010°C (1800-1850°F) * **Aging Treatment:** 620-650°C (1150-1200°F) for 8-12 hours * **Special Heat Treatments:** Custom cycles for specific applications **Note:** *Inconel® is a registered trademark of Special Metals Corporation. These specialized product forms often require customized heat treatments, specific quality control protocols, and specialized processing expertise. All product forms maintain the alloy's exceptional resistance to sulfide stress cracking per NACE MR0175 requirements. Manufacturers typically provide detailed technical data sheets and processing recommendations for each specific product form and application requirement. Consultation with materials engineers is recommended for optimal selection and application of these specialized product forms.*

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 1816 gallon liquid totes Special package is available on request.