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

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

Packing of InduSteel Rod SUPERELSO® 500HR Quenched and Tempered High Strength Steel Rod 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 Rod 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