AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING Steel Tube,Pipe BARS FOR TURBINE BLADES (SUH 616-B)

AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING Steel Tube BARS FOR TURBINE BLADES (SUH 616-B) Product Information -:- For detailed product information, please contact sales. -: AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING Steel Tube BARS FOR TURBINE BLADES (SUH 616-B) Synonyms -:- For detailed product information, please contact sales. -:

AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING STEEL BARS FOR TURBINE BLADES (SUH 616-B) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI 422 / 12Cr-1Mo-1W-0.3V Martensitic Stainless Steel for Turbine Components** --- ## **1. Overview** **AISI 422** is a high-strength, martensitic, precipitation-hardenable stainless steel specifically engineered for high-temperature strength, creep resistance, and corrosion/oxidation resistance. Its nominal composition of **12% Chromium, 1% Molybdenum, 1% Tungsten, and 0.3% Vanadium** places it in the category of advanced heat-resisting steels. This alloy is primarily supplied in the form of **bars, forgings, and billets** for the manufacture of critical rotating and stationary components in steam and gas turbines. The designation **SUH 616-B** refers to its Japanese Industrial Standard (JIS) code, widely recognized in the power generation industry. Its unique combination of properties makes it indispensable for parts operating under high centrifugal stress, elevated temperature, and corrosive/erosive environments. --- ## **2. International Standards** This material is recognized under various international specifications tailored for high-temperature service. * **Primary Standards (Bar & Forging):** * **ASTM A565 / ASME SA-565 (Grade 616):** *Standard Specification for Martensitic Stainless Steel Bars, Forgings, and Forging Stock for High-Temperature Service.* This is the most common ASTM specification for this grade. * **AMS 5616:** Aerospace Material Specification for a closely related composition. * **JIS G4311 / G4312 SUH 616-B:** Japanese Industrial Standard for heat-resisting steel bars and forgings. * **Key International & Industry Equivalents:** * **UNS S42200:** Unified Numbering System designation. * **EN 10095 X20CrMoWV12-1 / 1.4935:** The European standard (EN) for similar heat-resisting steels. * **DIN 1.4935:** The German material number. * **GB/T 1221 1Cr12W1MoV:** Chinese national standard equivalent. --- ## **3. Chemical Composition (Weight %, Typical)** The alloying strategy is optimized for strength and stability at high temperatures. | Element | Typical Range (%) | Role & Benefit | | :--- | :--- | :--- | | **Carbon (C)** | 0.20 – 0.25 | Essential for martensite formation, provides base strength and wear resistance. | | **Chromium (Cr)** | 11.00 – 13.00 | **Primary alloy.** Provides oxidation and corrosion resistance in steam and mild atmospheres, and contributes to strength. | | **Molybdenum (Mo)** | 0.75 – 1.25 | Enhances high-temperature strength, creep resistance, and hardenability. | | **Tungsten (W)** | 0.75 – 1.25 | **Key alloy.** Provides solid solution strengthening and significantly improves **long-term creep strength** by stabilizing carbides. | | **Vanadium (V)** | 0.20 – 0.30 | **Critical microalloy.** Forms fine, stable **vanadium carbides (VC)** that provide **precipitation hardening** during tempering, crucial for high-temperature strength and creep resistance. | | **Manganese (Mn)** | 0.50 – 1.00 | Aids in deoxidation and improves hardenability. | | **Silicon (Si)** | 0.50 (max) | Deoxidizer, improves oxidation resistance. | | **Phosphorus (P)** | ≤ 0.025 | Impurity, controlled for toughness. | | **Sulfur (S)** | ≤ 0.025 | Impurity, controlled for hot workability and ductility. | --- ## **4. Typical Physical & Mechanical Properties (Hardened & Tempered Condition)** * **Heat Treatment:** Standard treatment involves **Austenitizing (~1050-1100°C)** followed by **Oil or Air Quenching**, and **Double Tempering** (typically first temper ~650-750°C, second temper slightly lower) to achieve the optimal balance of strength and toughness. * **Tensile Strength:** 930 - 1130 MPa (135,000 - 165,000 psi) * **Yield Strength (0.2% Offset):** ≥ 760 MPa (110,000 psi) * **Elongation:** ≥ 12% (in 50mm) * **Reduction of Area:** ≥ 45% * **Hardness:** 28 - 36 HRC (typical for service) * **Density:** ~ 7.75 g/cm³ * **Modulus of Elasticity:** ~ 215 GPa (31 x 10⁶ psi) at 20°C * **Thermal Conductivity:** ~ 25 W/m·K (at 100°C) * **Coefficient of Thermal Expansion:** ~ 11.0 x 10⁻⁶ /K (20-100°C) * **Critical High-Temperature Performance:** * **Maximum Service Temperature:** Suitable for long-term service up to **~580-620°C (1075-1150°F)**. * **Outstanding Creep & Rupture Strength:** The synergistic effect of Mo, W, and V provides exceptional resistance to deformation under stress at high temperatures. * **Good Oxidation Resistance:** The 12% Cr content provides adequate protection in steam and mild flue gas environments typical of turbines. * **High Fatigue Strength:** Essential for rotating blades subjected to cyclic stresses. --- ## **5. Product Application** AISI 422 (SUH 616-B) is a premium material selected for the most demanding, high-stress components in thermal energy systems. * **Steam Turbines:** * **High-Pressure (HP) & Intermediate-Pressure (IP) Turbine Blades and Buckets** (especially the final stages of HP/IP sections). * **Stationary Components:** Nozzle diaphragms, spacer rings, and high-temperature bolting. * **Gas Turbines:** * **Compressor Blades** in later stages where temperature and stress are high. * **Turbine Disks and Shafts** (for smaller or specialized turbines). * **Aerospace:** Components for auxiliary power units (APUs) and certain engine parts. * **High-Temperature Fasteners and Valves** for critical service. --- ## **6. Key Features & Advantages** * **Superior High-Temperature Strength:** One of the strongest commercially available martensitic stainless steels at temperatures above 500°C, thanks to its precipitation-hardening mechanism. * **Excellent Creep-Rupture Properties:** The combination of tungsten and vanadium offers exceptional long-term load-bearing capability at elevated temperatures. * **Good Damping Capacity:** Martensitic structure provides better vibration damping than austenitic steels, beneficial for rotating blades. * **Good Oxidation & Corrosion Resistance:** Suitable for steam and moderately aggressive environments encountered in turbines. * **High Hardenability:** Can be through-hardened in large sections, making it suitable for large forgings like turbine rotors. * **Balanced Properties:** Achieves an optimal trade-off between strength, toughness, and high-temperature stability through precise heat treatment. --- **In summary, AISI 422 (12Cr-1Mo-1W-0.3V / SUH 616-B) is a high-performance martensitic heat-resisting steel bar and forging stock. It is the material of choice for critical turbine components requiring an unmatched combination of ultra-high strength, exceptional creep resistance, and adequate oxidation resistance at elevated temperatures, enabling higher efficiency and reliability in modern power generation equipment.** -:- For detailed product information, please contact sales. -: AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING STEEL BARS FOR TURBINE BLADES (SUH 616-B) Specification Dimensions Size： Diameter 20-1000 mm Length <7015 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. -: AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING STEEL BARS FOR TURBINE BLADES (SUH 616-B) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING Steel Tube BARS FOR TURBINE BLADES (SUH 616-B) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING Steel Tube BARS FOR TURBINE BLADES (SUH 616-B) -:- For detailed product information, please contact sales. -:

Packing of AISI 422 12Cr-1Mo-1W-0.3V HEAT RESISTING Steel Tube BARS FOR TURBINE BLADES (SUH 616-B) -:- 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 Tube 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 3486 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