1. Key Properties:
High-Performance Chromium-Molybdenum Alloy Steel: X11CrMoWVNb9-1-1 is an advanced chromium-molybdenum steel alloy with the added benefits of tungsten (W), vanadium (V), and niobium (Nb), which significantly enhance its performance in high-temperature, high-pressure environments.
Exceptional Creep and Fatigue Resistance: The alloy is designed to offer superior resistance to creep, thermal fatigue, and oxidation, making it ideal for critical high-stress applications in power plants, petrochemical, and other industries exposed to elevated temperatures.
High-Temperature Strength: X11CrMoWVNb9-1-1 maintains its strength and hardness even under prolonged exposure to high temperatures, ensuring the longevity and reliability of components used in extreme conditions.
Enhanced Weldability: The material is generally weldable but may require preheating and post-weld heat treatment to maintain mechanical properties and prevent cracking.
Corrosion and Oxidation Resistance: Thanks to the chromium and tungsten content, the alloy provides excellent resistance to oxidation and corrosion, even in aggressive environments like steam or chemical processes.
2. Applications/Industries:
Power Generation: X11CrMoWVNb9-1-1 is widely used in power plants for manufacturing boiler tubes, superheaters, reheaters, steam pipelines, and other high-temperature components that must withstand thermal stresses and pressure.
Petrochemical: The alloy is used for high-temperature applications in the petrochemical industry, including heat exchangers, reactors, and other critical components exposed to high temperatures and corrosive substances.
Oil & Gas: X11CrMoWVNb9-1-1 is ideal for the oil and gas industry, particularly for applications such as high-pressure pipelines, reactor vessels, and equipment exposed to extreme temperatures.
Chemical Processing: Used in the chemical industry for process equipment such as reactors, heat exchangers, and piping, where high-temperature strength, corrosion, and oxidation resistance are crucial.
Heavy Machinery: Suitable for components in heavy machinery exposed to extreme thermal and mechanical stresses, such as turbines, valves, and high-pressure systems.
3. Certifications/Standards:
DIN 17175: X11CrMoWVNb9-1-1 complies with the DIN 17175 standard, which applies to seamless steel pipes for high-temperature applications, ensuring that it meets necessary specifications for reliability and performance.
ISO 9001: Produced according to ISO 9001 standards for quality management, ensuring consistency in manufacturing and high product quality.
4. Chemical Composition:
Carbon (C): 0.09% – 0.12%
Manganese (Mn): 0.30% – 0.60%
Chromium (Cr): 9.00% – 10.50%
Molybdenum (Mo): 0.90% – 1.10%
Tungsten (W): 0.20% – 0.30%
Vanadium (V): 0.20% – 0.30%
Niobium (Nb): 0.01% – 0.05%
Silicon (Si): 0.20% – 0.40%
Phosphorus (P): 0.025% max
Sulfur (S): 0.010% max
Iron (Fe): Balance
5. Technical Specifications:
Yield Strength:
X11CrMoWVNb9-1-1: 450–600 MPa (depending on heat treatment and thickness)
Tensile Strength:
X11CrMoWVNb9-1-1: 600–750 MPa
Hardness:
X11CrMoWVNb9-1-1: Typically ranges between 200–250 HB (Brinell hardness), depending on heat treatment and the specific application.