| 2507 Super Duplex Steel Valve Balls | ||
| Size Range | 1/2" to 56" (Custom sizes available) | |
| Pressure Rating | PN10-PN420 (Class150-2500) | |
| Body Material | A105, A350 LF2, A182 F304, A182 F316, A182 F321, A182 F51, A182 F53, A182 F55, A182 F60, A182 F44, A564 630 (17-4PH) INCONEL625, INCONEL718, INCONEL825, Monel 400, Monel 500 etc |
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| Core Process/Coating | ENP,HCR,STL6, STL12, STL20,Cr3C2, WC-Co, WC-Cr3C2-Ni, TiC-NiMo, SiC, CrC,ZrO2, Al2O3, Cr2O3, ZnO, TiO, Al2O3-TiO2,STL1, STL6, STL12,Ni60, Ni55, Ni45 etc. | |
| Operating Temperature Range | ≤1200°C | |
| Parameter Category | Core Technical Parameters | Standards for Determining Advanced Technological Level |
| Machining ball accuracy | ≤ 0.025 mm | ≤ 0.005 mm (Ultra-High Precision) |
| Processing ball Roundness | ≤ 0.025 mm | ≤ 0.011 mm (Micron-Level ) |
| Balls concentricity | ≤ 0.025 mm | ≤ 0.005 mm (Ultra-High Precision) |
| Other supplements | ≤ 0.4 μm | ≤ 0.1 μm (Mirror-Level) |
| Parameter Category | Core Technical Parameters | Criteria for High-End Technical Level |
| Coating Thickness Control | Thickness Uniformity | Thickness deviation at any spherical position ≤±8% (stricter than the general ±10% standard) |
| Thickness Tolerance Range | 100 - 300 μm (common range for wear-resistant layers); special ranges can be noted. No missed spraying for ultra-thin coatings (<10μm) | |
| Coating Adhesion Performance | Surface Hardness | HV 1300+ |
| Bond StrengthBond Strength | ≥80 MPa | |
| Interface PorosityInterface Porosity | <0.5% | |
| Coating Surface Quality | Surface Roughness (Ra) | ≤0.2 µm |
| Spraying Accuracy (Positioning & Coverage) | Spraying Positioning Accuracy | ±0.1mm |
Core Product: Defining Performance Peak with Dual-Phase Structure
Our duplex steel valve ball series is not a simple extension of ordinary Stainless Steel valve Balls but an engineering masterpiece based on unique metallurgy, providing the ultimate answer for specific extreme conditions.
2507 Super Duplex Steel Valve Balls (SS2507 valve balls) contain high levels of chromium, molybdenum, and nitrogen, with a Pitting Resistance Equivalent Number (PREN) typically exceeding 40, far superior to 316L and even 904L. They excel particularly in resisting localized corrosion in seawater, high-chloride wastewater, and acidic oil & gas environments, making them an ideal core component for offshore platforms, chemical processing, and flue gas desulfurization systems.
Mechanical Strength Advantage of Duplex Stainless Steel
Compared to purely austenitic stainless steels (like 304/316), the standout feature of Duplex SS valve balls is their nearly double yield strength. This means valves utilizing our Super Duplex Steel valve balls can be designed more compactly and lightly for the same pressure class, while offering excellent resistance to stress corrosion cracking, especially suitable for pipeline environments under tensile stress.
Complete Duplex Material Portfolio
We provide a complete duplex steel solution to meet different grade requirements:
- SS2205 valve balls: Standard duplex steel, offering excellent cost-performance for most demanding oil, gas, and chemical applications, serving as a powerful upgrade from 316L.
- SS2507 valve balls: Super duplex steel, designed for the most aggressive environments, providing top-tier corrosion resistance and strength.
Engineered for Demanding Service
Our Super Duplex Steel valve balls and Duplex SS valve balls undergo precise phase balance control (typically targeting a ~50/50 austenite/ferrite ratio) starting from the material melting stage. Our advanced manufacturing and heat treatment processes ensure the final product achieves the optimal dual-phase structure, fulfilling its promise of combined high strength, high corrosion resistance, and high fatigue resistance.
Technical Focus: Core Processes for Mastering Dual-Phase Structure
Precise Phase Ratio Control:
We meticulously regulate the austenite and ferrite phase ratio through strict heat treatment regimens (solution treatment and rapid cooling), avoiding the precipitation of harmful intermetallic phases (e.g., sigma phase). This is key to guaranteeing the performance of SS2507 valve balls and SS2205 valve balls.
Work Hardening Management:
Duplex steels have a high work hardening rate. We employ special cutting parameters, tooling, and intermediate annealing processes (if required) to ensure our SS valve balls maintain excellent dimensional stability and surface quality during precision machining, preventing performance risks from introduced machining stresses.
Comprehensive NDE & Performance Testing:
Beyond standard inspections, we conduct metallographic analysis on each batch of Super Duplex Steel valve balls to verify phase balance, along with hardness, impact toughness, and specific corrosion tests (e.g., ASTM G48), providing a comprehensive material performance data package.
Why Choose TongBall's Duplex Steel Valve Balls for Extreme Conditions?
Practical Experts in Duplex Materials:
We possess deep knowledge of the metallurgical sensitivity and machining complexity of duplex steels, capable of fully translating the theoretical advantages of this high-performance material into actual product performance.
Complete Spectrum from 2205 to 2507:
We offer not only the top-tier 2507 Super Duplex Steel Valve Balls but also the widely applicable SS2205 valve balls, providing customers with the best cost-performance choice based on specific corrosive environments and budgets.
Accountable for Both Strength and Corrosion Resistance:
When your application requires resisting both aggressive media and high pressure or mechanical stress, our Duplex SS valve balls are the reliable solution that meets these two core demands simultaneously.
Is Your System Facing the Dual Challenge of High Strength and Severe Corrosion?
If chloride ions, high pressure, and high stress collectively challenge your valves, single-property materials may be nearing their limits. TongBall's Super Duplex Steel valve balls series, with its "Dual-Phase, Double Reliability" DNA, provides you with the hardcore capital to conquer the most severe operating conditions.
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