1.7383 (11CrMo9-10) Forged Steel Parts | 2.25Cr-1Mo Steel | China Professional Open Die Forging Manufacturer

Material Overview: 1.7383 (11CrMo9-10) Heat-Resistant Steel

1.7383 (also designated as 11CrMo9-10, globally known as 2.25Cr-1Mo steel) is a high-performance European standard heat-resistant chromium-molybdenum alloy structural steel, it is used in long-term stable service at elevated temperatures up to 550°C and it has excellent creep resistance, high temperature strength, oxidation resistance, hydrogen corrosion resistance and anti-temper brittleness performance.

As a professional ISO 9001:2015 & PED certified forging manufacturer located in Jiangyin City, Jiangsu Province — China's core forging industry cluster — Jiangsu Liangyi specializes in the production of custom 1.7383 open die forging parts, seamless rolled steel forged rings, and precision machined forged components for global industrial clients.

We provide full-process one-stop services from steel melting, forging, heat treatment to finish machining.

Custom 1.7383 (11CrMo9-10) Forging Products We Supply

With advanced 2000T–6300T hydraulic forging presses, 5M seamless rolling machines, and full-process production lines, we manufacture a complete range of 1.7383 forging products fully compliant with EN, ASTM, DIN, API 6A international standards.

Forged Bars & Rotating Shafts

Round bars, square bars, flat bars, rectangular bars, step shafts, gear shafts, splined drive shafts, turbine shafts, pump shafts, valve spindles, and custom forged rods — maximum length up to 12 m.

Seamless Rolled Forged Rings

Seamless rolled rings, swivel ring flanges, gear rings, turbine guide rings, seal rings, labyrinth rings, valve seat rings, and custom contoured rolled rings — outer diameter up to 5 m.

Hollow Forgings & Pressure Vessel Components

Forged hubs, housings, shells, sleeves, bushes, hollow bars, pipe tubes, tubing shells, casings, barrels, tube sheets, channel flanges, and custom pressure vessel forgings for high-temperature high-pressure applications.

Forged Blocks, Plates & Discs

Forged discs, blocks, plates, blanks, adapter blocks, fluid end blocks, and custom heavy forged blocks, with a maximum weight of up to 30 tons per single piece.

Valve & Oilfield Forged Components

Forged valve bodies, valve bonnets, valve balls, valve stems, valve discs, wellhead equipment parts, casing heads, tubing heads, casing hangers, and other custom oil & gas forgings — fully compliant with API 6A standard.

Industry Applications & Verified Project Cases

Our 1.7383 forged parts are used in industries that need excellent high temperature resistance, high pressure resistance, and hydrogen corrosion resistance.

Boiler & Pressure Vessel Industry

They are a good choice of material for boiler drums, pressure vessels, heat exchangers, reactors, and heaters in thermal power and petrochemical industries, and they fully meet the PED 2014/68/EU standard.

Nuclear Power Industry

We provide High-precision 1.7383 forged components for nuclear power projects. These components include nuclear power trunnions, reactor coolant pump casings, rotors, impellers, and containment seal chambers, with strict non-radioactive material control.

Oil & Gas Onshore & Offshore Industry

Components for onshore shale gas, offshore oil and gas projects including downhole drilling tools, wellhead equipment, fracturing equipment, and long-distance pipeline systems. Excellent hydrogen sulfide and hydrogen corrosion resistance.

Valve & Pipeline Engineering Industry

Full range of 1.7383 forged valve components and high-pressure pipeline fittings including valve bodies, bonnets, balls, stems, seat rings, discs, wye pieces, swept branches, double studded adapter flanges, and high-pressure elbows.

Turbomachinery & Industrial Compressor Industry

Components are used for gas steam turbines, gas air compressors, and centrifugal compressors including turbine guide rings, seal rings, labyrinth rings, compressor impellers, rotors, shafts, and other rotating components.

1.7383 (11CrMo9-10) Steel Equivalent Grades

1.7383 (11CrMo9-10) is a globally recognized 2.25Cr-1Mo heat-resistant steel grade in international industrial standards:

1.7383 Steel Production Standards & Melting Requirements

Steel Melting Requirements

• Primary melting: Electric arc furnace (EAF) with subsequent ladle refining (LF) treatment for precise composition control
• Vacuum degassing (VD/VOD) treatment to make sure low gas content, high purity and excellent fatigue resistance
• Strict non-radioactive material control for nuclear power and high-safety applications
• Quality class shall be at least MQ in accordance with ISO 6336-5 or DIN 3990-5 standard
• Custom melting processes available for special application requirements

Compliant Production Standards

• EN 10222-2:2000 – Steel forgings for pressure purposes – Ferritic and martensitic steels with specified elevated temperature properties
• EN 10216-2:2014 – Seamless steel tubes for pressure purposes – Technical delivery conditions for alloy steel tubes
• EN 10273:2007 – Hot rolled weldable steel bars for pressure purposes with specified elevated temperature properties
• EN 10083-3 – Steels for quenching and tempering – Technical delivery conditions for alloy steels
• Custom compliance with ASTM, API 6A, DIN, JIS and PED 2014/68/EU standards according to customer requirements

11CrMo9-10 Steel Heat Treatment Process

Heat treatment is a critical process to make sure the mechanical properties, microstructure stability, and long service life of 1.7383 forgings. Below is our standard heat treatment process.

• Normalizing: Heating to 900–950°C, holding for enough time based on section thickness, and air cooling to refine grain structure and relieve internal stress
• Quenching: Heating to 920–960°C, holding for appropriate time to ensure uniform austenitization, and quenching in oil or forced air
• Tempering: Heating to 650–750°C, holding for sufficient time, and controlled cooling to adjust mechanical properties, eliminate quenching stress, and improve toughness
• Stress Relief Annealing: Optional process for large and complex forgings to further eliminate residual stress and improve dimensional stability
• Custom heat treatment processes available according to specific technical requirements

Chemical Composition & Mechanical Properties

Chemical Composition (Smelted Analysis, %)

Mechanical Properties (Room Temperature, After Quenching & Tempering)

High-Temperature Mechanical Properties (Minimum Values, EN 10222-2)

Rigorous Quality Inspection

Inspection Equipment & Capabilities

• Non-Destructive Testing (NDT): Use Automatic ultrasonic testing (UT) with data acquisition; manual UT; magnetic particle testing (MT) or dye penetrant inspection (PT/FPI); and radiographic testing (RT) for special requirements
• Dimensional Inspection: High-precision three-coordinate measuring machine, caliper, micrometer, height gauge — accuracy up to ±0.01mm
• Material Analysis: Direct-reading spectrometer for chemical composition; metallographic microscope; scanning electron microscope (SEM) for microstructure and inclusion rating
• Mechanical Testing: Universal tensile testing machine, impact testing machine, hardness tester, high-temperature tensile and creep testing machines

Full Inspection Report Included With Every Order

• Product identification, material number and designation, order/drawing/specification number
• Heat number, chemical analysis, melting method, and finished product chemical analysis report
• Complete heat treatment certificate with full graphic temperature-time records
• Full NDT records and NDT inspector certification
• Results of all mechanical tests and residual stress measurements
• Dimensional inspection report with actual measured values and visual inspection report
• Mill test certificate (MTC 3.1/3.2) according to EN 10204 standard

Quality Certifications & Compliance Standards

Frequently Asked Questions (FAQ)

Why Choose Jiangsu Liangyi for 1.7383 Forgings?