Custom Forged Steel Valve Stems Manufacturer for API 6A, ASTM, DIN, EN & NACE Projects

Why Choose Our Forging Steel Valve Stems Over Cast Valve Stems

As a main load-bearing, sealing, and actuation component of industrial valves, the quality of valve stems directly determines the safety, stability, and lifetime of the entire valve system. Our open die forged steel valve stems have significant advantages over cast valve stems, making them the only reliable choice for high-pressure, high-temperature, and safety-critical global industrial projects:

• Superior Mechanical Properties: Our open die forging process refines the internal grain distribution of the steel, eliminates porosity, shrinkage, segregation, and other casting defects, They have 30-50% higher tensile strength, better low-temperature impact resistance, and great fatigue resistance than cast valve stems, which are important for cyclic load applications in the oil & gas and power generation industries.
• Excellent Material Homogeneity: The full forging process ensures uniform chemical composition and mechanical properties throughout the entire valve stem, avoiding uneven performance and premature failure common in cast products.That means our parts have consistent performance even in extreme working conditions.
• Stronger Corrosion & Wear Resistance: Our forged valve stems are very strongly resistant to corrosion  in sour service (H2S/CO2), seawater, and harsh chemical media. Combined with our professional surface treatment processes, our valve stems have 2-4 times longer lifetime than cast valve stems in demanding environments.
• Higher Pressure & Temperature Resistance: Our forged steel valve stems can bear working pressures up to 15,000 PSI and temperatures ranging from -196℃ (cryogenic LNG service) to 650℃ (high-temperature steam service), fully meeting the requirements of extreme global industrial projects.
• Full Compliance with International Standards: All our forging steel valve stems fully meet global industry standards, with complete EN 10204 3.1/3.2 mill test certificates, and optional third-party inspection from BV, SGS, TUV, Lloyd's, or DNV.

Standard Material Grades for Forging Steel Valve Stems (Global Market Compliant)

We offer a full range of material grades for forged steel valve stems, covering carbon steel, low alloy steel, stainless steel, duplex & super duplex steel, and nickel-based super alloys. All materials are sourced from top-tier Chinese steel mills (such as Baosteel, Wuhan Iron and Steel).All of materials are fully traceable  and meet international standards. We can also customize special material grades according to clients requirements.

Nickel-Based Super Alloys (Extreme Corrosion & High Temperature Service)

They are used for extreme working conditions such as high-temperature steam, strong acid/alkali media, sour service, and nuclear power applications. All parts meet international standards and are used in high-end petrochemical, power generation, and aerospace projects around the world.

• Inconel Alloys: Inconel 600, 601, 617, 625, 706, 718, 725, 690, X-750, 783
• Incoloy Alloys: Incoloy 800, 800H, 800HT, 825, 925, 926
• Monel Alloys: Monel 400, Monel K500
• Hastelloy Alloys: Hastelloy C276, C22, B2, B4, C-4, X, C2000, G30, G50
• Other Special Alloys: Alloy 20, Sanicro 28, Nimonic 75, 80A, 90

Advanced Melting Methods for Forging Steel Valve Stems

To ensure the internal purity, mechanical properties, and fatigue resistance of our forging steel valve stems, we employ industry-leading melting processes with full control from raw material steelmaking to final delivery. Following are our available melting methods:

1. EAF (Electric Arc Furnace): It is the normal way to melt general industrial carbon steel and low alloy steel valve stems,which make sure the chemical composition of parts stays stable.
2. EAF+LF+VD: Electric Arc Furnace + Ladle Refining + Vacuum Degassing. This process gets rid of harmful gases (like hydrogen, oxygen, and nitrogen) and non-metallic particles in the steel, so that the material is more pure and tougher at low temperatures. That means they can work well in the oil and gas industry that needs low temperatures and high pressures.
3. EAF+ESR (Electro Slag Remelting): Further improves the internal density and purity of the steel, deletes macro and micro segregation and defects, and significantly improves the fatigue resistance and corrosion resistance of the valve stems. They are used for high-demand alloy steel, stainless steel, and duplex steel valve stems.
4. EAF+PESR: Protective Atmosphere Electro Slag Remelting. Keeps the composition and properties of the material stable by preventing oxidation of reactive alloy elements like titanium, niobium, and aluminum during the remelting process. 
5. VIM+PESR: Vacuum Induction Melting + Protective Atmosphere Electro Slag Remelting. The highest level melting process for super alloys, ensuring ultra-high purity, uniform composition, and minimal inclusions. They are used for extreme working condition valve stems in aerospace, nuclear power, and high-end chemical projects.

All our melting processes are completed in our in-house steelmaking workshop, with full traceability of the whole process, and each batch of materials is subject to strict chemical composition testing (Spectral Analysis & C/S Analysis) before entering the forging process.

Full Production Process of Forging Steel Valve Stems

We control the whole production process from steelmaking to final inspection, to make sure that each forged steel valve stem meets your requirements and international standards. Following are our complete production process:

Raw Material Inspection → Smelting → Ingot Casting → Ingot Inspection → Heating (Controlled Atmosphere) → Open Die Forging → Preliminary Heat Treatment (Annealing/Normalizing) → Forging Inspection (Visual & Dimensional) → Rough Machining → UT Ultrasonic Testing (Compliant with API 6A, ASTM A388) → Secondary Precision Heat Treatment (Quenching & Tempering) → Mechanical Properties Testing (In-House CNAS-Certified Laboratory) → Finishing Machining (CNC Lathes/Mills) → Final Comprehensive Inspection → Marking → Mill Test Certificate Issuance → Anti-Corrosion Packaging → Delivery

We have 2000T/4000T/6300T hydraulic forging presses, 1T/3T/5T/9T electro-hydraulic forging hammers, and 10 professional controlled atmosphere heat treatment furnaces.  We can make forged valve stems up to 15 meters in length, 1800 mm in diameter and 30 tons in weight.. We offer a full production chain from custom forging and heat treatment to fine machining.All parts fully meet the client’s technical specifications and 2D / 3D drawings.

For more detailed information about our advanced production and inspection equipment, please visit our Equipment Page.

Professional Surface Finish Treatments for Forged Valve Stems

To further improve the wear resistance, corrosion resistance, sealing performance, and lifetime of our forging steel valve stems, we offer a full range of professional surface finish treatments, completed in our in-house surface treatment workshop under strict quality control:

• ENP (Electroless Nickel Plating)
• Hard Chrome Plating
• Tungsten Carbide Coating (HVOF)
• Stellite Spray Welding & Overlay
• Nickel Alloy Spray Welding
• Cobalt Alloy Spray Welding
• Nitriding Treatment (Gas/Plasma)
• Passivation & Pickling (Stainless Steel)

Strict Quality Inspection & Testing System

All finished forging steel valve stems undergo 100% full inspection and testing in our in-house CNAS-certified laboratory to make sure they all fully meet international standards and your requirements. Following are our inspection and testing items:

Standard Marking for Finished Forged Steel Valve Stems

All finished valve stems are marked by permanent stamping or forged-in marking, which will not wear off or be lost during transportation and service. The marking includes the following information:

• Manufacturer Identification Mark (Jiangsu Liangyi)
• Heat Number (Full Traceability)
• Test Specimen Number
• Heat Treatment Number (If Applicable)
• Material Grade & Standard
• Serial Number (If Applicable)

We provide complete EN 10204 3.1 or 3.2 mill test certificates for all orders free of charge, which include chemical composition, mechanical properties, heat treatment records, and nondestructive testing results. The third-party inspection services by BV, SGS, TUV, Lloyd's Register, DNV, or other international authoritative institutions is available according to your requirements.

Global Industrial Applications & GEO-Targeted Project Cases of Forging Steel Valve Stems

Our high-performance forging steel valve stems are used in extreme industrial conditions in over 50 countries around the world, with a large number of successful GEO-targeted project cases in main global markets. Below are our main application scenarios and representative project cases:

Oil & Gas Upstream & Downstream Projects (Middle East & North America)

Our forged steel valve stems are main parts of onshore/offshore wellhead equipment, Christmas trees, choke valves, pipeline ball valves, and refinery control valves. They are used in the Middle East and North America, the world's largest oil & gas markets. We follow the rules set out in the API 6A 17th and18th editions of the API 6A. All of our materials meet the sour service requirements of NACE MR0175 and ISO 15156

Representative Project Case: We have supplied more than 50,000 custom API 6A 75K/100K/150K forged valve stems for major oilfield projects in Saudi Arabia (ARAMCO), UAE (ADNOC), Kuwait, and the US Permian Basin. Using AISI 4130, 4140, A182 F6NM, and Inconel 718 materials, our valve stems have excellent high-pressure resistance, sulfide stress cracking (SSC) resistance, and stable performance in harsh H2S and CO2 environments, with zero quality failures over 8 years of continuous operation.

Thermal & Nuclear Power Generation (Asia & Europe)

Our forged steel valve stems are important safety parts for boiler feedwater systems, high-temperature steam control valves, turbine bypass systems, and nuclear island safety valves in thermal power plants, nuclear power stations, and renewable energy facilities in Asia and Europe. Our products meet all of the ASME BPVC and PED CE standards, which means that all of the parts will work reliably even when the temperature and pressure are very high and change all the time.

Representative Project Case:  We have provided custom forged valve stem solutions for over 30 thermal power plants and 2 nuclear power auxiliary projects China, Southeast Asia, and Germany We use ASTM A182 F91, F92, F11, F22, and 17-4PH to make our valve stems because they can handle high temperatures. They stay stable up to 650°C, which helps millions of homes get a steady supply of electricity.The European market requires all products to have EN 10204 3.2 certification.

Petrochemical & Chemical Processing (Global)

In corrosive petrochemical refineries, chemical plants, and fertilizer production facilities around the world, our forged steel valve stems are used in acid/alkali resistant pipelines, high-pressure reactor control valves, crude oil distillation systems, and polymer production equipment. We provide professional material selection solutions according to different chemical media, making sure all parts have reliable long‑term performance.

Representative Project Case: Our forging steel valve stems have been successfully used in 12 large-scale petrochemical projects in Singapore, South Korea, the United States, and Germany. Using industry-leading corrosion resistant materials including Hastelloy C276, Inconel 625, 904L, 254SMO, and Duplex Stainless Steel UNS S32750, with Stellite spray welding surface treatment, our valve stems have excellent resistance to strong acid, strong alkali, and organic solvent corrosion, with a lifetime 3 times longer than ordinary stainless steel valve stems.

Marine & Shipbuilding Industry (Global)

For commercial shipbuilding, offshore drilling platforms, and marine engineering projects around the world, our forged steel valve stems are main parts for shipboard piping systems, ballast water control valves, bilge system valves, and offshore platform fluid control systems. Our products meet all the requirements, and they are very resistant to corrosion in seawater and impact at low temperatures.

Representative Project Case:  Our custom forged valve stems are used in more than 20 shipbuilding projects and eight offshore platform projects in Europe, Southeast Asia, and the Middle East. Our forging steel valve stems are made from marine-grade materials like Monel 400/K500, Duplex Stainless Steel 2205, and ASTM A182 F316L. These materials can withstand long-term corrosion from seawater and the marine environment, so all the parts will work reliably in harsh marine environments for more than 15 years.

Water Treatment & Seawater Desalination (Middle East & Australia)

In large-scale seawater desalination plants, municipal water treatment systems, and industrial wastewater treatment facilities across the Middle East and Australia, our forging steel valve stems are main parts for reverse osmosis high-pressure pump valves, flow control valves, and brine treatment systems. Our products have excellent chloride ion corrosion resistance and long-term wear resistance, significantly reducing the maintenance cost of the project.

Representative Project Case: We have sent over 20,000 custom-made forged valve stems to six large seawater desalination plants in Saudi Arabia, the UAE, and Australia. We use super austenitic and super duplex stainless steel to make our valve stems. Some examples are 254SMO, 654SMO, AL-6XN, and UNS S31254. They can last for more than ten years in seawater with a lot of salt, which erodes them over time. Our customers know a lot about our parts.

Our forging steel valve stems are also used in mining machinery, aerospace, pharmaceutical, and food & beverage industries. For more detailed project references, please visit our Reference Page. We also provide a full range of other high-quality forged products, including forged bars, seamless rolled rings, and forged shafts, to meet your one-stop procurement needs.

Frequently Asked Questions (FAQ) About Forging Steel Valve Stems

Contact Us for Custom Forged Steel Valve Stems Quotation

Jiangsu Liangyi Co., Limited is a leading China manufacturer and global supplier of high-performance forging steel valve stems. With more than 25 years of open die forging experience, we will provide clients with competitive price and professional suggestions for your global industrial projects.

Whether you need standard series valve stems or fully custom special nickel-based super alloy valve stems, we can meet your unique requirements.To get a full quote within 24 hours, please send us your custom 2D/3D drawings, material specifications, quantity, and project requirements.