Alloy R30035 (35N) — Ultra-High Strength Nickel-Cobalt-Chromium-Molybdenum Superalloy
Product Description
FUSHUN METAL is proud to offer premium quality Alloy R30035 (35N), an exceptional multi-phase nickel-cobalt-chromium-molybdenum superalloy specifically engineered to achieve ultra-high strength while maintaining excellent ductility, toughness, and superior corrosion resistance. Through controlled cold working and precipitation hardening, this remarkable alloy can reach tensile strength levels between 260 to 300 ksi (1793 to 2069 MPa), making it one of the strongest commercially available corrosion-resistant alloys.
Alloy R30035 demonstrates outstanding resistance to various challenging environments, including chloride solutions, mineral acids (nitric, hydrochloric, and sulfuric), and exhibits exceptional resistance to crevice corrosion in seawater and sulfide stress cracking in severe downhole environments. This unique combination of ultra-high strength and superior corrosion performance makes it the ideal material for critical applications in medical, aerospace, oil & gas, and chemical processing industries where failure is not an option. FUSHUN METAL supplies Alloy R30035 in various product forms including bar, rod, wire, tube, and flat products, all manufactured under stringent quality control to meet the most demanding industry specifications.
Standards and Specifications
Alloy R30035 (35N) from FUSHUN METAL meets or exceeds the following industry standards and specifications:
| Standard | Designation |
|---|---|
| UNS | R30035 |
| AMS | 5758, 5844, 5845 |
| NACE | MR0175 / ISO 15156 |
| ASTM | F-562 (Surgical Implant Applications) |
| BS | 7252-6 (Surgical Implant Applications) |
| ISO | 5832-6 (Surgical Implant Applications) |
Chemical Composition
FUSHUN METAL manufactures Alloy R30035 with precise control of chemical composition according to UNS R30035 requirements:
| Element | Content (%) |
|---|---|
| Cobalt (Co) | 30.0 minimum |
| Nickel (Ni) | 33.0 – 37.0 |
| Chromium (Cr) | 19.0 – 21.0 |
| Molybdenum (Mo) | 9.0 – 10.5 |
| Titanium (Ti) | 1.0 maximum |
| Iron (Fe) | 1.0 maximum |
| Carbon (C) | 0.025 maximum |
| Manganese (Mn) | 0.15 maximum |
| Phosphorus (P) | 0.015 maximum |
| Sulfur (S) | 0.010 maximum |
| Silicon (Si) | 0.15 maximum |
Role of Key Alloying Elements
- Cobalt (30.0% minimum): Provides solid solution strengthening, increases resistance to thermal fatigue, and enhances the alloy’s work hardening capability.
- Nickel (33.0-37.0%): Forms the base matrix of the alloy, providing excellent corrosion resistance, especially in reducing environments.
- Chromium (19.0-21.0%): Imparts outstanding resistance to oxidation and corrosion in oxidizing environments through the formation of a protective passive layer.
- Molybdenum (9.0-10.5%): Significantly enhances resistance to pitting and crevice corrosion, particularly in chloride-containing environments, and provides solid solution strengthening.
- Titanium (1.0% max): Contributes to precipitation hardening during aging treatments, forming strengthening precipitates that increase the alloy’s mechanical properties.
Physical Properties
Alloy R30035 (35N) from FUSHUN METAL exhibits the following physical properties:
| Property | Value (Imperial) | Value (Metric) |
|---|---|---|
| Melting Range | 2400-2625°F | 1315-1440°C |
| Density | 0.304 lb/in³ | 8.41 g/cm³ |
| Modulus of Elasticity (RT, CW+Aged) | 34 × 10⁶ psi | 234 × 10³ MPa |
| Poisson’s Ratio | 0.4 | 0.4 |
| Coefficient of Thermal Expansion (68-212°F/20-100°C) | 7.4 × 10⁻⁶ /°F | 13.5 × 10⁻⁶ /°C |
| Electrical Resistivity at RT (CW+Aged) | 40.7 μΩ·in | 103.3 μΩ·cm |
| Thermal Conductivity (68-212°F/20-100°C, CW+Aged) | 7.77 BTU/hr-ft-°F | 13.4 W/m-K |
| Specific Heat | 0.18 BTU/lb-°F | 753 J/kg-K |
| Relative Magnetic Permeability | 1.0009μ | 1.0009μ |
| Maximum Service Temperature | 750°F | 400°C |
Mechanical Properties
The mechanical properties of Alloy R30035 (35N) can be tailored through varying degrees of cold work and appropriate heat treatment. FUSHUN METAL can provide the material in various strength conditions to meet specific application requirements:
| Condition | 0.2% Yield Strength ksi (MPa) |
Tensile Strength ksi (MPa) |
Elongation % |
Reduction of Area % |
Hardness HRC |
|---|---|---|---|---|---|
| Solution Heat Treated and Work Hardened | 230 (1585) min | 260 (1795) min | 8 min | 35 min | 38 min |
| Solution Heat Treated, Work Hardened and Aged | 230 (1585) min | 260 (1795) min | 8 min | 35 min | 44 min |
| CW + Age Hardened (Ultra-High Strength) | 240 (1655) min | 250 (1725) min | 4 min | 20 min | 51 max |
| CW + Age Hardened (High Strength) | 200 (1380) min | 210 (1450) min | 6 min | 20 min | 51 max |
| CW + Age Hardened (Moderate Strength) | 190 (1310) min | 210 (1450) min | 10 min | 20 min | 51 max |
| CW + Age Hardened (Enhanced Ductility) | 180 (1240) min | 190 (1310) min | 15 min | 50 min | 51 max |
Note: Final mechanical properties depend on the amount of cold work, final size, and specific heat treatment. FUSHUN METAL can tailor the processing parameters to achieve the desired combination of strength and ductility for your specific application.
Heat Treatment
FUSHUN METAL provides Alloy R30035 (35N) in various conditions and can perform the following heat treatments to achieve optimal properties:
Solution Annealing
- Temperature Range: 1900-2000°F (1038-1093°C)
- Holding Time: 4-8 hours
- Cooling: Rapid cooling (water quenching preferred)
- Purpose: Dissolves precipitates, homogenizes the structure, and prepares the material for subsequent working and aging operations
Precipitation Hardening (Aging)
After solution annealing and cold working, Alloy R30035 can be precipitation hardened in the temperature range of 800-1500°F (427-816°C). Two primary aging regimes are commonly employed:
High Strength Aging
- Temperature: 1000-1050°F (538-566°C)
- Time: 4 hours
- Cooling: Air cooling
- Result: Achieves maximum strength levels while maintaining good ductility
NACE MR0175/ISO 15156 Compliant Aging
For improved resistance to sulfide stress corrosion cracking, the following aging treatments are recommended:
| Minimum Time (hours) | Temperature °F (°C) |
|---|---|
| 4 | 1300 (704) |
| 4 | 1350 (732) |
| 6 | 1425 (774) |
| 4 | 1450 (788) |
| 2 | 1475 (802) |
| 1 | 1500 (816) |
Note: Heat treatment at temperatures above 1300°F (700°C) helps to improve resistance to Hydrogen Embrittlement (HE) in addition to enhancing sulfide stress cracking resistance. For NACE MR0175/ISO 15156 compliance, the maximum hardness after cold reduction and high-temperature aging must not exceed 51 HRC.
Corrosion Resistance
Alloy R30035 (35N) from FUSHUN METAL maintains excellent corrosion resistance even in the fully hardened condition, making it unique among ultra-high strength materials:
General Corrosion Resistance
The alloy exhibits outstanding resistance to a wide range of corrosive media, including:
- Mineral acids (nitric, hydrochloric, and sulfuric)
- Various chloride environments
- Organic acids
- Oxidizing and reducing environments
Localized Corrosion Resistance
The high chromium and molybdenum content provides exceptional resistance to:
- Pitting corrosion
- Crevice corrosion in seawater
- Intergranular attack
Sour Service Performance
Under the International standard NACE MR0175/ISO 15156 (Materials for use in H₂S-containing environments in oil and gas production), Alloy R30035 is recognized as suitable for equipment and components in any combination of:
- Temperature
- H₂S partial pressure
- Chloride concentration
- pH levels that occur in production environments
For spring applications, no limits exist on individual parameters, although some parameter value combinations may not be acceptable. This exceptional sulfide stress cracking (SSC) resistance makes Alloy R30035 ideal for critical downhole oil and gas applications in severe sour environments.
Key Advantages of Alloy R30035 (35N)
Alloy R30035 (35N) from FUSHUN METAL offers several remarkable advantages that set it apart from other high-performance materials:
- Ultra-High Strength: Achievable tensile strengths of 260-300 ksi (1793-2069 MPa), among the highest of any corrosion-resistant alloy.
- Excellent Ductility and Toughness: Maintains good elongation and reduction of area even at high strength levels, with exceptional low-temperature toughness.
- Outstanding Corrosion Resistance: Superior performance in chloride environments, mineral acids, and exceptional resistance to crevice corrosion in seawater.
- Exceptional Sour Service Performance: Excellent resistance to sulfide stress cracking in severe downhole environments, with NACE MR0175/ISO 15156 compliance.
- Biocompatibility: Suitable for surgical implant applications per ASTM F-562, BS 7252-6, and ISO 5832-6.
- Non-Magnetic Properties: Very low magnetic permeability (1.0009μ), making it suitable for applications requiring non-magnetic materials.
- Tailorable Properties: The ability to adjust strength and ductility through controlled cold working and heat treatment allows customization for specific application requirements.
- Good Fabricability: Can be machined, formed, and welded using conventional techniques with proper procedures.
Applications
Due to its exceptional combination of ultra-high strength and superior corrosion resistance, Alloy R30035 (35N) from FUSHUN METAL is ideally suited for numerous demanding applications:
Oil and Gas Industry
- Downhole tools and components for sour service environments
- High-strength springs for severe service
- Subsurface safety valves
- Completion equipment
- Precision components for measurement while drilling (MWD) tools
- Fasteners for critical offshore applications
- High-pressure/high-temperature (HPHT) service components
Medical Applications
- Orthopedic implants
- Surgical instruments
- Dental devices
- High-strength wire for medical devices
- Springs for surgical tools
Aerospace and Defense
- Landing gear components
- Fasteners for critical applications
- High-strength springs
- Actuation systems
- Structural components requiring high strength and corrosion resistance
Chemical Processing
- Springs and flexible components for corrosive environments
- Valve components in aggressive media
- Fasteners for high-pressure equipment
- Instrumentation components
Marine Applications
- Fasteners and hardware for seawater exposure
- Springs for marine environments
- Underwater equipment components
- Flexible couplings
Available Product Forms
FUSHUN METAL provides Alloy R30035 (35N) in various product forms to meet diverse manufacturing requirements:
Round Bars and Rod
| Diameter Range | Length | Available Conditions |
|---|---|---|
| 0.062″ (1.6mm) to 6.0″ (152mm) | Random or cut-to-length | Solution Annealed, Cold Worked, Cold Worked + Aged |
Wire
| Diameter Range | Forms | Available Conditions |
|---|---|---|
| 0.002″ (0.05mm) to 0.500″ (12.7mm) | Coils, spools, or cut lengths | Solution Annealed, Cold Worked, Cold Worked + Aged |
Tube
| Outside Diameter | Wall Thickness | Available Conditions |
|---|---|---|
| 0.125″ (3.2mm) to 2.0″ (50.8mm) | 0.010″ (0.25mm) to 0.100″ (2.5mm) | Solution Annealed, Cold Worked, Cold Worked + Aged |
Flat Products
| Thickness | Width | Available Conditions |
|---|---|---|
| 0.010″ (0.25mm) to 0.250″ (6.35mm) | Up to 24″ (610mm) | Solution Annealed, Cold Worked, Cold Worked + Aged |
Note: FUSHUN METAL can provide custom sizes and conditions to meet specific application requirements. Please inquire for your specific needs.
Fabrication Guidelines
Alloy R30035 (35N) can be fabricated using conventional techniques, with the following recommendations:
Machining
- Parameters for machining Alloy R30035 in a high strength condition are similar to other nickel-cobalt-chromium alloys such as Waspalloy®
- Use rigid tooling setups to minimize chatter and deflection
- Carbide tooling with positive rake angles is recommended
- Lower cutting speeds compared to stainless steels are advised
- Adequate cooling and lubrication should be maintained
- For optimal machinability, consider machining in the solution annealed condition and then performing final age hardening
Welding
- Alloy R30035 is readily welded in the solution annealed condition
- Use similar techniques as for 300 series stainless steels
- The same preparations and precautions used for 300 series stainless steels should be applied
- Gas Tungsten Arc Welding (GTAW/TIG) is the preferred method
- Clean surfaces thoroughly before welding to prevent contamination
- Post-weld heat treatment is recommended to restore properties when required
Cold Working
- Cold working is a critical step in developing the ultra-high strength properties of Alloy R30035
- The alloy exhibits excellent work hardening response
- Intermediate annealing may be necessary for severe forming operations
- Final aging should be performed after all cold working operations are complete
Heat Treatment Considerations
- Ensure proper temperature control during heat treatment
- Use protective atmospheres or vacuum to prevent surface oxidation
- Allow for potential distortion during aging
- For critical components, fixtures may be required to maintain dimensional stability
Quality Assurance
FUSHUN METAL maintains the highest standards of quality for Alloy R30035 (35N):
- Melt Process Control: Vacuum Induction Melting (VIM) and Vacuum Arc Remelting (VAR) processes ensure premium quality material with minimal inclusions and optimal properties
- Chemical Analysis: Each heat is analyzed using state-of-the-art spectrometers to ensure compositional compliance with specifications
- Mechanical Testing: Comprehensive testing including tensile, hardness, and impact properties
- Microstructural Examination: Verification of proper grain size and precipitate distribution
- Non-Destructive Testing: Ultrasonic, magnetic particle, and liquid penetrant inspection as required
- Dimensional Inspection: All products undergo thorough dimensional verification
- Certification: Complete material test reports and certification documentation provided with each shipment
- Traceability: Full traceability from melt to final product is maintained
- Compliance Verification: All products are verified to meet relevant industry specifications including AMS, NACE, ASTM, BS, and ISO requirements
Comparative Advantages
Understanding how Alloy R30035 (35N) compares to similar high-performance alloys helps in selecting the optimal material for specific applications:
| Characteristic | Alloy R30035 (35N) | MP35N (R30035) | Alloy 718 (N07718) | 17-4PH (S17400) |
|---|---|---|---|---|
| Maximum Achievable Strength | 300 ksi (2069 MPa) | 300 ksi (2069 MPa) | 180 ksi (1241 MPa) | 190 ksi (1310 MPa) |
| Corrosion Resistance | Excellent | Excellent | Good | Moderate |
| SSC Resistance (NACE) | Excellent | Excellent | Limited | Limited |
| Biocompatibility | Excellent | Excellent | Limited | Limited |
| Low Temperature Toughness | Excellent | Excellent | Good | Moderate |
| Maximum Service Temperature | 750°F (400°C) | 750°F (400°C) | 1200°F (650°C) | 600°F (315°C) |
| Magnetic Properties | Non-magnetic | Non-magnetic | Non-magnetic | Magnetic |
| Relative Cost | High | High | Moderate-High | Moderate |
Why Choose FUSHUN METAL for Alloy R30035 (35N)
Selecting FUSHUN METAL as your supplier for Alloy R30035 (35N) provides numerous advantages:
- Premium Quality: Our materials undergo rigorous testing and quality control to ensure consistent performance in the most demanding applications
- Material Expertise: Our team of metallurgists and engineers has extensive experience with high-performance superalloys and their applications
- Manufacturing Excellence: State-of-the-art production facilities with VIM-VAR process capabilities ensure superior material quality
- Customization Capability: We can tailor properties through controlled processing to meet your specific application requirements
- Technical Support: Expert assistance with material selection, heat treatment, and fabrication guidelines
- Global Supply Capability: Worldwide distribution network ensures timely delivery
- Industry Compliance: All products meet or exceed relevant industry standards including AMS, NACE, ASTM, BS, and ISO requirements
- Comprehensive Product Range: Available in various forms including bar, rod, wire, tube, and flat products
- Value-Added Services: Custom cutting, precision machining, and specialized heat treatment available upon request
Request Information
Contact FUSHUN METAL today to discuss your Alloy R30035 (35N) requirements. Our technical team is ready to assist you with:
- Detailed technical specifications
- Custom size and property requirements
- Fabrication recommendations
- Application-specific material selection guidance
- Price quotations and delivery schedules
- Material certification and testing requirements
