InduSteel Flange,SUPERELSO® 500HR Quenched and Tempered High Strength Steel Flange for Wet H2S Service

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: InduSteel Flange SUPERELSO® 500HR Quenched and Tempered High Strength Steel Flange for Wet H2S Service Product Information -:- For detailed product information, please contact sales. -: InduSteel Flange SUPERELSO® 500HR Quenched and Tempered High Strength Steel Flange for Wet H2S Service Synonyms -:- For detailed product information, please contact sales. -:

Industeel SUPERELSO® 500HR Quenched and Tempered High Strength Steel for Wet H2S Service Product Information -:- For detailed product information, please contact sales. -: # **Product Datasheet: Industeel SUPERELSO® 500HR Quenched & Tempered High-Strength Steel for Sour Service (Wet H₂S Environment)** ## **1. Product Overview** **SUPERELSO® 500HR** is a premium **high-strength, low-alloy (HSLA) steel plate** specifically engineered by Industeel (ArcelorMittal) for **pressure equipment and structural components operating in wet hydrogen sulfide (H₂S) environments**, commonly known as **"sour service."** The designation "500" indicates a **minimum yield strength of 500 MPa**, while "HR" signifies **High Resistance** to environmental degradation mechanisms prevalent in sour service, particularly **Sulfide Stress Cracking (SSC) and Hydrogen Induced Cracking (HIC)**. This steel combines high strength with exceptional environmental resistance, making it a critical material solution for oil and gas production, refining, and processing where safety and integrity in corrosive, hydrogen-charging conditions are non-negotiable. ## **2. International Standards & Designations** | System/Authority | Designation | Specification / Application Standard | | :--- | :--- | :--- | | **Manufacturer** | **Industeel SUPERELSO® 500HR** | Proprietary brand name, trademark of ArcelorMittal | | **European Pressure Equipment** | **EN 10028-6:2017** | Flat products for pressure purposes - Part 6: Weldable fine grain steels, quenched and tempered | | **Grade per EN 10028-6** | **P500QH** or similar Sour Service notation | Standard designation with supplemental HIC/SSC requirements | | **NACE International** | **MR0175/ISO 15156** | Materials for use in H₂S-containing environments in oil and gas production | | **NACE TM0284 & TM0177** | **Test Method Compliance** | Standard test methods for HIC and SSC resistance evaluation | | **ASME Boiler & Pressure Vessel** | **SA-841 / SA-832** (Grade equivalent) | Pressure vessel plates, produced by TMCP, for low-temperature and sour service | | **Common Names** | P500Q Sour Service Steel, 500 MPa Q&T HIC/SSC Resistant Steel, Sour Grade Plate | ## **3. Chemical Composition (% by Weight)** The chemistry is meticulously controlled to minimize SSC and HIC susceptibility while achieving the target strength. Key features include **ultra-low sulfur, controlled microalloying, and calcium treatment**. | Element | Typical SUPERELSO® 500HR Range (Sour Service Optimized) | Metallurgical Rationale for Sour Service | | :--- | :--- | :--- | | **Carbon (C)** | **≤ 0.12** (Often ≤ 0.10) | **Drastically reduced** to minimize hardness in the Heat-Affected Zone (HAZ) and base metal, directly reducing SSC risk. Lowers carbon equivalent (CE/Pcm). | | **Manganese (Mn)** | **≤ 1.60** (Often ≤ 1.40) | Controlled to low levels. High Mn promotes centerline segregation and banding, creating pathways for HIC. | | **Phosphorus (P)** | **≤ 0.012** | Ultra-low to minimize segregation and temper embrittlement susceptibility. | | **Sulfur (S)** | **≤ 0.0015** (≤ 15 ppm) | **Extremely low (Ca-treated).** Essential to minimize MnS inclusions, which are initiation sites for HIC blisters. | | **Silicon (Si)** | **≤ 0.30** | Kept low to improve HAZ toughness and reduce hardenability. | | **Chromium (Cr)** | **≤ 0.25** | Typically minimized as it can increase hardenability and SSC risk. | | **Nickel (Ni)** | **≤ 1.00** | Used cautiously for toughness; some specs limit Ni in sour service due to potential SSC effects. | | **Molybdenum (Mo)** | **≤ 0.30** | Used for hardenability control; high levels are avoided. | | **Copper (Cu)** | **≤ 0.20** | Residual; can be limited as it may affect corrosion properties. | | **Niobium (Nb)** | **≤ 0.04** | Fine grain refiner; controlled addition. | | **Vanadium (V)** | **≤ 0.05** | Often excluded or strictly limited due to its strong effect on precipitation hardening and potential to increase SSC susceptibility. | | **Titanium (Ti)** | **≤ 0.025** | Used for sulfide shape control (TiN formation). | | **Calcium (Ca)** | **Added for treatment** | **Critical:** Calcium treatment modifies remaining sulfide inclusions from elongated MnS to globular oxy-sulfides, drastically improving HIC resistance. | | **Iron (Fe)** | Balance | Matrix. | **Key Sour Service Metallurgy:** The steel achieves its strength primarily through **ultra-fine grain structure** (via TMCP) and **precipitation hardening from microalloys like Nb**, rather than high carbon or alloy content. This minimizes hardness and deleterious microstructural features. ## **4. Mechanical & Physical Properties** Properties meet standard Q&T 500 MPa requirements while adhering to strict sour service hardness limits. | Property | Standard Requirement / Typical Value | Test Standard | Importance for Sour Service | | :--- | :--- | :--- | :--- | | **Yield Strength (Rp0.2)** | **500 - 620 MPa** (Min. 500 MPa) | EN ISO 6892-1 | High strength for design efficiency. | | **Tensile Strength (Rm)** | **610 - 740 MPa** | EN ISO 6892-1 | | | **Yield-to-Tensile Ratio** | **≤ 0.93** (Typically 0.82-0.90) | -- | Ensures safety margin. | | **Elongation (A₅)** | **≥ 17%** | EN ISO 6892-1 | Good ductility. | | **Impact Toughness (Charpy V-notch)** | **≥ 60 J at -40°C** (Typical for P500QL1) | EN ISO 148-1 | Essential for low-temperature and dynamic loading in sour environments. | | **Maximum Hardness** | **≤ 250 HBW** (Often ≤ 237 HBW) | EN ISO 6506-1 | **CRITICAL for SSC Resistance.** NACE MR0175 typically requires ≤ 22 HRC (∼237 HBW) for welded components in severe sour service. | | **HIC Test Performance** (NACE TM0284 - Solution A) | **CLR ≤ 10%**, **CTR ≤ 3%**, **CSR ≤ 1%** | NACE TM0284 | **Guaranteed.** Measures resistance to Hydrogen Induced Cracking in standard test. | | **SSC Test Performance** (NACE TM0177 - Method A) | **No failure at specified threshold stress** (e.g., ≥ 80% AYS) | NACE TM0177 | **Qualified.** Validates resistance to Sulfide Stress Cracking under tensile stress. | | **Through-Thickness (Z) Property** | **Z35** standard (≥ 35% RA) | EN 10164 | Prevents lamellar tearing. | ## **5. Key Characteristics & Advantages** * **Certified Sour Service Resistance:** Specifically designed and tested to pass stringent **NACE TM0284 (HIC)** and **TM0177 (SSC)** tests, providing documented assurance for material selection in aggressive environments. * **Inherently Low SSC Susceptibility:** Achieves high strength while maintaining **hardness below the critical threshold of 22 HRC (237 HBW)**, a primary defense against SSC. * **Superior HIC Resistance:** **Ultra-low sulfur content (< 15 ppm)** combined with **calcium treatment** ensures a very clean steel with non-deleterious inclusion morphology, preventing hydrogen blistering and stepwise cracking. * **Excellent Weldability:** Very low **Pcm (≈0.15-0.20%)** allows welding with minimal preheat and low risk of HAZ hardening/ cracking. * **High Toughness:** Maintains excellent impact properties at low temperatures, suitable for offshore and cryogenic service in sour environments. * **Consistent Quality:** Produced under extreme cleanliness and process controls to ensure batch-to-batch reliability for critical service. ## **6. Primary Applications** SUPERELSO® 500HR is mandated for equipment in oil & gas production and processing where wet H₂S is present. * **Oil & Gas Production:** * **Separators (production, test, scrubbers)** * **Flowlines, headers, and manifolds** * **Gas dehydration and sweetening units** * **Water injection and treatment vessels** * **Refining & Petrochemical:** * **Crude distillation units** (overhead systems) * **Hydrotreaters and hydrocrackers** (effluent streams) * **Amine gas treating units** (regenerators, contactors) * **Sour water strippers** * **Gas Processing & Transmission:** * **Scrubbers and filters** in sour gas lines * **Process vessels** in LNG plants with H₂S content * **Offshore Platforms & FPSOs:** All pressurized equipment handling unprocessed or partially processed sour hydrocarbons. ## **7. Fabrication for Sour Service (Special Considerations)** * **Welding:** The **most critical fabrication step**. * **Filler Metals:** Must also be **sour service qualified**. Use basic low-hydrogen electrodes with similar low-S, low-P composition. * **Preheat & Interpass:** Strictly controlled to manage HAZ hardness and hydrogen diffusion. Typically **100-150°C**. * **Post Weld Heat Treatment (PWHT):** **Often mandatory** for pressure vessels to temper the HAZ, reduce residual stress, and drive out diffusible hydrogen. Must be performed per qualified procedure. * **Weld Hardness Control:** **100% hardness testing of weld cap, root, and HAZ** is required to verify all areas are **≤ 22 HRC (237 HBW)**. * **Cold Forming:** Limited to prevent strain hardening which can increase local hardness and SSC susceptibility. May require subsequent stress relieving. * **Cutting:** Thermal cutting edges must be ground back to remove the hardened layer. ## **8. Comparison with Standard Grades** | Parameter | **SUPERELSO® 500HR (Sour Service)** | SUPERELSO® 500 (Standard) | P355NH (Normalized, Non-Sour) | | :--- | :--- | :--- | :--- | | **S Content** | **≤ 15 ppm (0.0015%)** | ≤ 80 ppm (0.008%) | ≤ 150 ppm (0.015%) | | **Max Hardness** | **≤ 237 HBW (22 HRC)** | ~240 HBW | ~180 HBW | | **HIC/SSC Test** | **Certified Passing** | Not necessarily | Not applicable | | **Primary Alloying** | **Lean (Low C, Mn)** | Standard for strength | Standard | | **Primary Application** | **Wet H₂S Pressure Equipment** | General Pressure Equipment | General Pressure Equipment | | **Fabrication Controls** | **Extremely Stringent** | Standard Code Requirements | Standard Code Requirements | --- **Disclaimer:** This datasheet describes **Industeel SUPERELSO® 500HR** steel for sour service. **SUPERELSO® is a registered trademark of ArcelorMittal.** This material is intended for **high-risk, regulated service** in sour (H₂S) environments. Its successful application **requires strict adherence to industry standards (NACE MR0175/ISO 15156, ASME, EN)** and **expert fabrication procedures** focused on hardness control and hydrogen management. Material certification must include **HIC/SSC test reports**. Final design, material selection, and fabrication **must be approved by qualified corrosion/materials engineers** with sour service expertise. Compliance with the latest editions of all referenced standards is mandatory. -:- For detailed product information, please contact sales. -: Industeel SUPERELSO® 500HR Quenched and Tempered High Strength Steel for Wet H2S Service Specification Dimensions Size： Diameter 20-1000 mm Length <6435 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Industeel SUPERELSO® 500HR Quenched and Tempered High Strength Steel for Wet H2S Service Properties -:- For detailed product information, please contact sales. -:

Applications of InduSteel Flange SUPERELSO® 500HR Quenched and Tempered High Strength Steel Flange for Wet H2S Service -:- For detailed product information, please contact sales. -: Chemical Identifiers InduSteel Flange SUPERELSO® 500HR Quenched and Tempered High Strength Steel Flange for Wet H2S Service -:- For detailed product information, please contact sales. -:

Packing of InduSteel Flange SUPERELSO® 500HR Quenched and Tempered High Strength Steel Flange for Wet H2S Service -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange 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 2906 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition