17-4 PH — Premium NACE-Compliant Precipitation Hardening Stainless Steel for Oil & Gas Applications

Product Description

SHUNFU METAL offers premium 17-4 PH (UNS S17400) precipitation hardening stainless steel, specifically engineered for critical oil and gas applications requiring an exceptional combination of high strength, outstanding corrosion resistance, and excellent impact properties in harsh downhole environments. This martensitic stainless steel, with carefully controlled additions of copper and niobium (columbium), enables age hardening to various strength and hardness combinations while maintaining superior resistance to stress corrosion cracking in sour service conditions.

As a leading supplier to the oil and gas industry, SHUNFU METAL provides 17-4 PH in the NACE MR0175/ISO 15156-compliant H1150D condition, ensuring reliable performance in hydrogen sulfide environments. Our material undergoes rigorous testing by CNSA (China National Standards Association) to verify full compliance with ASTM A564 Grade 630 specifications. With its unique combination of properties, our 17-4 PH is the preferred material for critical downhole tools, completion equipment, wellhead components, and subsea applications where resistance to corrosive fluids, high mechanical loads, and temperature variations are essential for successful oil and gas operations.

Key Advantages for Oil & Gas Applications

• NACE MR0175/ISO 15156 Compliance: Certified for use in sour service environments containing hydrogen sulfide (H₂S)
• Excellent Corrosion Resistance: Superior performance in aggressive oilfield fluids, including brines, CO₂, and H₂S
• High Strength-to-Weight Ratio: Exceptional mechanical properties with minimum 105,000 PSI yield strength in H1150D condition
• Outstanding Low-Temperature Toughness: Maintains excellent impact values (27/19 Joules) at temperatures as low as -60°C, ideal for arctic and deep-water operations
• Superior Stress Corrosion Cracking Resistance: Enhanced performance in the H1150D double-aged condition
• Excellent Dimensional Stability: Minimal distortion during heat treatment and in service at elevated temperatures
• Exceptional Fatigue Properties: Superior resistance to cyclic loading encountered in downhole tools and equipment
• Good Weldability: Can be welded using standard techniques with appropriate procedures
• Magnetic Properties: Ferromagnetic characteristics enable magnetic particle inspection and use in magnetic coupling applications
• Wide Service Temperature Range: Maintains properties from cryogenic to elevated temperatures (up to 300°C/572°F)

Chemical Composition

SHUNFU METAL’s 17-4 PH stainless steel features a carefully controlled chemistry to achieve optimal mechanical properties and corrosion resistance for oil and gas environments:

Element	Weight %
Carbon (C)	0.07 Max
Silicon (Si)	1.00 Max
Manganese (Mn)	1.00 Max
Phosphorus (P)	0.04 Max
Sulfur (S)	0.03 Max
Chromium (Cr)	15.00 – 17.50
Nickel (Ni)	3.00 – 5.00
Copper (Cu)	3.00 – 5.00
Niobium (Nb) + Tantalum (Ta)	0.15 – 0.45

Role of Key Alloying Elements for Oilfield Performance

• Chromium (15.00-17.50%): Provides excellent corrosion resistance by forming a passive chromium oxide surface film, essential for protection in corrosive oilfield environments
• Copper (3.00-5.00%): Primary precipitation hardening element that forms fine Cu-rich precipitates during aging, significantly enhancing strength while maintaining toughness
• Nickel (3.00-5.00%): Stabilizes austenite, improves toughness, enhances corrosion resistance in reducing environments common in oil and gas production
• Niobium (0.15-0.45%): Forms carbides that strengthen the matrix and contribute to precipitation hardening, improves high-temperature strength for HPHT (High Pressure High Temperature) applications
• Low Carbon (0.07% Max): Ensures optimal corrosion resistance by minimizing chromium carbide formation, critical for maintaining integrity in sour service

Heat Treatment Condition

SHUNFU METAL supplies 17-4 PH stainless steel in the H1150D condition, specifically optimized for oil and gas applications requiring NACE MR0175/ISO 15156 compliance:

H1150D Condition (Standard Supply Condition)

• Solution Annealing: 1038°C (1900°F) followed by air cooling
• First Age Hardening: 620°C (1150°F) for 4 hours, air cooled
• Second Age Hardening: 620°C (1150°F) for 4 hours, air cooled

This double aging treatment (H1150D) produces the optimal combination of strength, toughness, and resistance to stress corrosion cracking required for sour service oil and gas applications. The H1150D condition is specifically recognized by NACE MR0175/ISO 15156 for use in environments containing hydrogen sulfide.

Additional Heat Treatment Conditions: Other heat treatment conditions (H900, H1025, H1075, H1150) can be supplied upon request for applications with different property requirements.

Mechanical Properties

17-4 PH stainless steel in the H1150D condition offers the following mechanical properties, making it ideal for demanding oil and gas service:

Property	Value
0.2% Yield Strength	105,000 PSI (724 MPa) min
Tensile Strength	125,000 PSI (862 MPa) min
Elongation	16% min
Reduction of Area	50% min
Hardness	33 HRC Max
Charpy V-Notch Impact @ -60°C	27/19 Joules (average/single minimum)

Properties Comparison Across Heat Treatment Conditions

While the H1150D condition is standard for oil and gas applications, SHUNFU METAL can supply other conditions upon request:

Heat Treatment Condition	Yield Strength (min)	Tensile Strength (min)	Elongation (min)	Hardness	NACE MR0175 Compliant
H900	170,000 PSI (1172 MPa)	190,000 PSI (1310 MPa)	10%	40-48 HRC	No
H1025	145,000 PSI (1000 MPa)	155,000 PSI (1069 MPa)	12%	35-42 HRC	No
H1075	125,000 PSI (862 MPa)	145,000 PSI (1000 MPa)	13%	32-38 HRC	No
H1150	110,000 PSI (758 MPa)	135,000 PSI (931 MPa)	14%	28-34 HRC	Limited
H1150D	105,000 PSI (724 MPa)	125,000 PSI (862 MPa)	16%	≤33 HRC	Yes

Corrosion Resistance in Oilfield Environments

17-4 PH stainless steel offers excellent corrosion resistance in various oil and gas production environments:

• General Corrosion: Superior resistance to atmospheric corrosion, freshwater, and mildly corrosive oilfield chemicals
• Stress Corrosion Cracking (SCC): The H1150D condition provides enhanced resistance to SCC in sour service environments
• CO₂ Corrosion: Good resistance to sweet corrosion (CO₂) commonly encountered in oil and gas production
• H₂S Resistance: NACE MR0175/ISO 15156 compliant in the H1150D condition for use in sour service with specific environmental limitations
• Chloride Resistance: Moderate resistance to chloride-containing environments such as oilfield brines
• Erosion-Corrosion: Excellent resistance to combined erosion and corrosion effects in flowing production fluids with abrasive particles

NACE MR0175/ISO 15156 Compliance

SHUNFU METAL’s 17-4 PH in the H1150D condition is compliant with NACE MR0175/ISO 15156 for use in sour service applications with the following limitations:

• Maximum hardness: 33 HRC
• Maximum H₂S partial pressure: As specified in the latest edition of NACE MR0175/ISO 15156-3
• Maximum temperature: As specified in the latest edition of NACE MR0175/ISO 15156-3
• Environmental restrictions: Subject to the requirements of the latest edition of NACE MR0175/ISO 15156-3

Oil & Gas Applications

17-4 PH stainless steel from SHUNFU METAL is specifically engineered for critical oil and gas applications:

Downhole Applications

• Completion Equipment: Packers, safety valves, sliding sleeves, and flow control devices
• Downhole Tools: Measurement While Drilling (MWD) and Logging While Drilling (LWD) components
• Directional Drilling Components: Housings, sleeves, and internal components for rotary steerable systems
• Artificial Lift Equipment: Submersible pump components, gas lift equipment, and rod pump components
• Hydraulic Accumulators: High-pressure chambers for storage of hydraulic fluid under pressure
• Perforating Gun Components: Carriers and charge holders for perforating systems

Wellhead and Surface Equipment

• Valve Components: Stems, balls, seats, and body components for both surface and subsurface valves
• Choke Components: Trim parts, stems, and plugs for production and drilling chokes
• Actuator Components: Shafts, pistons, and housings for hydraulic and pneumatic actuators
• Wellhead Components: Hangers, adapters, and internal components for wellhead assemblies
• Pump Components: Impellers, shafts, sleeves, and wear parts for centrifugal and positive displacement pumps

Subsea Applications

• Subsea Tree Components: Internal parts for valves, actuators, and connectors
• Subsea Control Systems: Hydraulic fittings, couplings, and components
• ROV Interface Components: Stabs, receptacles, and connectors
• Subsea Sensors: Housings and pressure-containing components
• Manifold Components: Internal parts and structural components

Process Equipment

• Separation Equipment: Internals for oil, gas, and water separation systems
• High-Pressure Piping Components: Flanges, fittings, and specialty components
• Heat Exchanger Components: Tubesheet supports and other critical components
• Sealing Products: Seal rings, faces, and seats for mechanical seals in pumps and compressors

Manufacturing Capabilities

SHUNFU METAL offers comprehensive manufacturing solutions for 17-4 PH stainless steel products serving the oil and gas industry:

Available Product Forms

• Round Bars: Diameter range from 6mm to 300mm (0.25″ to 12″)
• Hexagonal Bars: Size range from 8mm to 100mm (0.315″ to 4″) across flats
• Square Bars: Size range from 10mm to 100mm (0.4″ to 4″)
• Flat Bars: Thickness from 5mm to 100mm (0.2″ to 4″)
• Near-Net Shapes: Custom forged shapes to minimize machining
• Custom Machined Components: Precision machined parts to customer specifications

Quality Assurance for Oil & Gas Applications

• 100% PMI (Positive Material Identification): Ensures material chemistry compliance
• Ultrasonic Testing: Per customer requirements and applicable oil and gas standards
• MPI (Magnetic Particle Inspection): Surface defect detection
• Dimensional Inspection: Comprehensive measurement and reporting
• Mechanical Testing: Full tensile, hardness, and impact testing as required
• Corrosion Testing: NACE compliant testing available upon request
• CNSA Verification: Each batch independently tested by China National Standards Association
• Full Traceability: From raw material to finished product

Specifications and Compliance

SHUNFU METAL’s 17-4 PH stainless steel meets or exceeds the following specifications:

• ASTM A564/A564M: Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes, Grade 630
• NACE MR0175/ISO 15156: Petroleum and natural gas industries — Materials for use in H₂S-containing environments in oil and gas production
• UNS S17400: Unified Numbering System designation for 17-4 PH stainless steel
• W.Nr. 1.4542: European designation for 17-4 PH stainless steel
• API 6A: Specification for Wellhead and Tree Equipment (material requirements)
• API 17D: Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment (material requirements)

Certifications

• ISO 9001: Quality Management System
• API Q1: American Petroleum Institute Quality Management System
• CNSA: China National Standards Association verification

Machining and Fabrication Guidelines

Recommendations for processing 17-4 PH stainless steel for oil and gas components:

Machining

• Condition for Machining: Best machined in the solution annealed condition when extensive machining is required
• Tool Materials: Carbide or high-speed steel tools recommended
• Cutting Speed: Moderate cutting speeds (30-50% of those used for carbon steel)
• Feed Rate: Lower feed rates compared to carbon steel
• Coolant: Abundant cooling recommended
• Surface Finish: Excellent surface finishes achievable with proper tooling and parameters

Welding

• Weldability: Good weldability with proper procedures
• Recommended Processes: GTAW (TIG), GMAW (MIG), and SMAW (Stick) with appropriate parameters
• Filler Metals: ER630 or similar matching composition
• Pre-Heating: Generally not required
• Post-Weld Heat Treatment: Aging treatment recommended after welding to restore properties
• Special Considerations for Oil & Gas: Welding procedures should be qualified per applicable specifications (e.g., ASME Section IX, API 6A, NACE requirements)

Technical Support for Oil & Gas Applications

SHUNFU METAL provides comprehensive technical support to help customers maximize the performance of our 17-4 PH stainless steel in oil and gas environments:

• Material Selection Guidance: Expert assistance in selecting the optimal grade and condition for specific oilfield applications
• Heat Treatment Consultation: Recommendations for heat treatment parameters to achieve required properties
• Corrosion Resistance Assessment: Guidance on material suitability for specific oil and gas environments
• NACE Compliance Support: Assistance with understanding and meeting NACE MR0175/ISO 15156 requirements
• Failure Analysis: Investigation and root cause analysis of material-related issues in field service
• Custom Testing: Specialized mechanical, corrosion, or metallurgical testing as required for specific applications
• Processing Recommendations: Guidelines for optimal machining, welding, and fabrication
• Quality Documentation: Comprehensive certification packages tailored to oil and gas industry requirements

Why Choose SHUNFU METAL for 17-4 PH Stainless Steel

Selecting SHUNFU METAL as your supplier for 17-4 PH stainless steel provides numerous advantages for your oil and gas applications:

• Oil & Gas Industry Expertise: Specialized knowledge of material requirements for downhole, wellhead, and subsea applications
• NACE MR0175/ISO 15156 Compliance: Guaranteed compliance with sour service requirements
• API Q1 Certification: Quality management system certified to API Q1 requirements
• Strict Quality Control: Comprehensive testing and inspection to ensure consistent properties
• CNSA Verification: Each production batch undergoes independent testing by the China National Standards Association
• Material Traceability: Complete documentation from melt to final inspection
• Flexible Batch Sizes: Ability to provide both large production runs and smaller quantities for specialized applications
• Technical Support: Comprehensive metallurgical and application engineering assistance
• Competitive Delivery: Efficient production scheduling and global logistics capabilities
• Value-Added Services: Heat treatment, machining, and custom finishing capabilities

Request Information

Contact SHUNFU METAL today to discuss your 17-4 PH stainless steel requirements for oil and gas applications. Our technical team is ready to assist you with:

• Detailed technical specifications
• Material selection guidance for specific oilfield environments
• NACE MR0175/ISO 15156 compliance documentation
• Custom size and property requirements
• Price quotations and delivery schedules
• Quality certification and documentation packages
• Technical support for your specific application