Project Description
N09935 (110K) Nickel Alloy Steel – Premium CRA Material from ShunFu Metal
High-Performance Nickel-Based Corrosion Resistant Alloy for Demanding Oil & Gas Applications
Introduction to N09935 (110K) Alloy
N09935, designated as UNS N09935 with material classification 110K, represents one of the most advanced nickel-based corrosion resistant alloys (CRA) available in today’s market. As a leading manufacturer of specialty oilfield materials, ShunFu Metal takes pride in offering this premium grade alloy that meets the most stringent requirements of the oil and gas industry.
This nickel-chromium-molybdenum alloy is specifically engineered to withstand the harshest downhole environments, including those containing hydrogen sulfide (H₂S), carbon dioxide (CO₂), and chlorides. The unique chemical composition of N09935 provides exceptional resistance to sulfide stress cracking (SSC), stress corrosion cracking (SCC), and pitting corrosion, making it an ideal choice for sour gas service applications.
With nickel content ranging from 35.0% to 38.0% and chromium content between 19.5% and 22.0%, this alloy delivers superior performance in aggressive environments where conventional stainless steels would fail. The addition of molybdenum (3.00-5.00%) and titanium (1.80-2.50%) further enhances the alloy’s resistance to localized corrosion and provides excellent age-hardening characteristics.
Key Features of N09935 from ShunFu Metal
Superior Corrosion Resistance
Outstanding resistance to SSC, SCC, and pitting in H₂S and CO₂ environments
High Strength Properties
Minimum yield strength of 110 ksi (758 MPa) achieved through age hardening
Excellent Toughness
Maintains impact properties even in sub-zero temperature conditions
Manufacturer Direct
Factory-direct pricing with full quality control from ShunFu Metal
Applications of N09935 (110K) Alloy
The exceptional combination of high strength, superior corrosion resistance, and excellent toughness makes N09935 the preferred material choice for the most demanding applications in the oil and gas industry. ShunFu Metal, as a specialized manufacturer, supplies this premium alloy to operators worldwide who require reliable performance in extreme conditions.
Primary Industry Applications
Sour Gas Production
Wellhead components, tubing hangers, and production equipment for high H₂S content reservoirs. The alloy’s superior SSC resistance ensures long-term reliability in sour service environments where hydrogen sulfide concentrations can exceed several percent.
Deepwater Drilling
Subsea equipment, flowline connectors, and downhole tools for ultra-deep offshore operations. N09935 provides the strength and corrosion resistance needed for high-pressure, high-temperature (HPHT) environments encountered in deep wells.
Completion Equipment
Safety valves, packers, mandrels, and other completion hardware that must maintain mechanical integrity throughout the well’s producing life. The age-hardened condition provides both strength and ductility.
Chemical Processing
Process equipment, valves, and piping components for handling corrosive media in refineries and petrochemical plants. The alloy resists attack from a wide range of acids and chloride-containing solutions.
Whether you’re developing a new sour gas field, completing ultra-deep wells, or upgrading existing facilities to handle more aggressive production fluids, N09935 from ShunFu Metal delivers the performance you need. Our manufacturing capabilities allow us to supply both standard inventory items and custom specifications for your specific project requirements.
Standards and Specifications for N09935
As a professional manufacturer of specialty alloys, ShunFu Metal produces N09935 (110K) in compliance with internationally recognized standards. Our quality management system, certified to ISO 9001, ensures consistent material properties and full traceability from melt to final product.
Applicable Standards
| Standard Organization | Specification | Description |
|---|---|---|
| UNS | N09935 | Unified Numbering System Designation |
| API | API 6ACRA | Age-Hardened Nickel-Based CRA Materials for Oilfield Equipment |
| NACE | MR0175 / ISO 15156 | Petroleum and Natural Gas Industries – Materials for Use in H₂S-Containing Environments |
| ASTM | ASTM B637 | Precipitation-Hardening and Cold Worked Nickel Alloy Bars and Forgings |
| ISO | ISO 15156-3 | CRAs and Other Alloys for Use in Sour Service |
Manufacturing Process Requirements
N09935 must be produced using specific melting and remelting sequences to achieve the required cleanliness and homogeneity. ShunFu Metal utilizes the following approved manufacturing routes:
Process Route A
- Step 1: Basic Electric Furnace (EF)
- Step 2: AOD, VOD, or Vacuum Degassing
- Step 3: ESR, EFR, or VAR
- Optional Step 4: VAR (double melt)
Process Route B
- Step 1: Vacuum Induction Melting (VIM)
- Step 2: ESR, EFR, or VAR
- Optional Step 3: VAR (double melt)
Chemical Composition of N09935 (110K)
The carefully balanced chemical composition of N09935 is designed to provide optimal corrosion resistance while maintaining excellent mechanical properties after age hardening. ShunFu Metal, as a dedicated manufacturer, maintains strict control over all alloying elements to ensure consistent performance in demanding service conditions.
| Element | Content (%) | Function |
|---|---|---|
| Nickel (Ni) | 35.0 – 38.0 | Base element for corrosion resistance and toughness |
| Chromium (Cr) | 19.5 – 22.0 | Passive film formation and oxidation resistance |
| Iron (Fe) | Balance | Matrix element |
| Molybdenum (Mo) | 3.00 – 5.00 | Pitting and crevice corrosion resistance |
| Titanium (Ti) | 1.80 – 2.50 | Age-hardening precipitates (gamma prime) |
| Copper (Cu) | 1.00 – 2.00 | Corrosion resistance in reducing acids |
| Niobium (Nb) | 0.20 – 1.00 | Grain refinement and strengthening |
| Aluminum (Al) | 0.50 max | Deoxidation and precipitation hardening |
| Carbon (C) | 0.030 max | Low carbon to prevent sensitization |
| Manganese (Mn) | 1.00 max | Deoxidation and hot workability |
| Silicon (Si) | 0.35 max | Deoxidation |
| Cobalt (Co) | 1.00 max | Solid solution strengthening |
| Tungsten (W) | 1.00 max | Strength and corrosion resistance |
| Phosphorus (P) | 0.025 max | Controlled impurity |
| Sulfur (S) | 0.001 max | Ultra-low for SSC resistance |
Note: The ultra-low sulfur content (0.001% max) is critical for sour service applications and requires special melting practices that ShunFu Metal rigorously follows.
Available Sizes and Product Forms
ShunFu Metal maintains comprehensive inventory of N09935 (110K) in various sizes and product forms. As a manufacturer with extensive production capabilities, we can supply both standard sizes from stock and custom dimensions to meet your specific project requirements.
Forged Round Bar
- Diameter Range: 80mm – 1200mm
- Length: As required (up to 12m)
- Condition: Forged + Heat Treated
Rolled Round Bar
- Diameter Range: 10mm – 300mm
- Length: 3m – 12m (standard)
- Condition: Hot Rolled + Heat Treated
Custom Manufacturing Available
Beyond standard sizes, ShunFu Metal offers custom product forms including hollow bars, rings, discs, and machined blanks. Common sizes are available from stock for immediate shipment. Contact our technical team to discuss your specific dimensional requirements and we will provide competitive pricing for bulk orders.
Heat Treatment Procedures for N09935
Proper heat treatment is essential to achieve the required mechanical properties and corrosion resistance in N09935 alloy. ShunFu Metal’s in-house heat treatment facilities are equipped with precision-controlled furnaces capable of meeting the stringent requirements specified for this grade.
| Treatment Stage | Temperature | Time | Cooling |
|---|---|---|---|
| Solution Annealing | 1870°F – 1975°F (1021°C – 1079°C) | 0.5 – 4 hours | Water quench or rapid cool |
| Age Hardening (Step 1) | 1345°F – 1435°F (729°C – 779°C) | 4 – 9 hours | Furnace cool to Step 2 temp |
| Age Hardening (Step 2) | 1165°F – 1255°F (629°C – 679°C) | 12 hours minimum | Air cool |
Heat Treatment Notes
Solution Treatment: Dissolves precipitates and produces a homogeneous austenitic structure. Rapid cooling is essential to prevent premature precipitation during cooling.
Duplex Aging: Two-step aging process produces optimum combination of strength, ductility, and toughness. Controlled cooling between stages is critical for consistent properties.
Mechanical Properties of N09935 (110K)
After proper heat treatment, N09935 exhibits excellent mechanical properties that make it suitable for the most demanding oilfield applications. All materials supplied by ShunFu Metal are tested to verify compliance with the following requirements.
Tensile Requirements
| Cross-Section Thickness | 0.2% Yield Strength Min | 0.2% Yield Strength Max | Tensile Strength Min | Elongation Min | Reduction of Area Min |
|---|---|---|---|---|---|
| ≤10 in (254 mm) | 110 ksi (758 MPa) | 140 ksi (965 MPa) | 140 ksi (965 MPa) | 18% | 25% |
| >10 in (254 mm) | 110 ksi (758 MPa) | 140 ksi (965 MPa) | 140 ksi (965 MPa) | 18% | 20% |
Charpy V-Notch Impact Toughness Requirements (10mm x 10mm)
| Cross-Section Thickness | Orientation | Minimum Average | Minimum Single | Min Lateral Expansion |
|---|---|---|---|---|
| <3 in (76 mm) | Longitudinal | 35 ft-lbs (47 J) | 30 ft-lbs (41 J) | 0.015 in (0.38 mm) |
| ≥3 in (76 mm) through 10 in (254 mm) | Transverse | 30 ft-lbs (41 J) | 25 ft-lbs (34 J) | 0.015 in (0.38 mm) |
| >10 in (254 mm) | Transverse | 25 ft-lbs (34 J) | 20 ft-lbs (27 J) | 0.015 in (0.38 mm) |
Hardness Requirements
| Property | Minimum | Maximum |
|---|---|---|
| Hardness HRC (HBW) | 24 HRC | 34 HRC |
Machining and Processing Services
As a full-service manufacturer, ShunFu Metal offers comprehensive machining and processing capabilities to deliver N09935 products ready for your application. Our state-of-the-art machine shop is equipped with the latest CNC equipment and experienced operators skilled in working with nickel-based alloys.
Turning Operations
- OD rough and finish turning
- Surface grinding to tight tolerances
- Thread cutting (API and metric)
- Bright bar finishing
Boring Operations
- BTA deep hole boring
- Gundrilling for long holes
- ID honing and finishing
- Hollow bar production
Thread Cutting
- API rotary shoulder connections
- Premium threaded connections
- Custom thread profiles
- Thread gauging and inspection
Quality Assurance
- Dimensional inspection (CMM)
- Surface finish measurement
- NDE (UT, MT, PT)
- Full material certification
Why Choose ShunFu Metal for N09935 (110K)?
Direct Manufacturer
As a manufacturer, we offer factory-direct pricing without middleman markups. Our integrated production facilities ensure complete quality control from melt to final product.
Technical Expertise
Our team of 22 metallurgists and materials engineers provides expert guidance on grade selection, heat treatment, and application suitability for your specific requirements.
Bulk Order Capacity
With 8,000+ tons of inventory and 20,000 square meters of warehouse space, we are equipped to handle large volume orders with competitive lead times and pricing.
Global Experience
Serving customers in 52+ countries, we understand international standards and documentation requirements. We are a qualified supplier to the world’s top 10 oilfield service companies.
Request a Quote for N09935 (110K) Today
Contact ShunFu Metal for competitive pricing on bulk orders. Our technical team is ready to assist with your CRA material requirements.
We are committed to integrate steel resources in china and serve the global steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise before. In the aspect of resources and information, we have established cooperative relationship with nearly hundred enterprises, either state-owned or private owned in China.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want. We provide preffesional one-stop service to the Contractors of follows project:
- Oil and Gas Pipeline Construction
- Onshore and Offshore
- Boiler Manufacturers
- Oil Refining Equipment
- Petroleum and Chemical Plant Construction
- Fire Protection
- Heating & Air Conditioning
Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets we serve. Just give us a call +86-731-89903933.
