1. Key Properties:
Chromium-Molybdenum Alloy Steel: X11CrMo9-1 is a high-alloy steel with a combination of chromium and molybdenum designed to provide excellent strength and resistance to thermal degradation at elevated temperatures.
Excellent High-Temperature Strength: The material is designed for use in high-temperature environments, where it can withstand prolonged exposure to heat without significant loss of mechanical properties.
Outstanding Creep Resistance: X11CrMo9-1 offers excellent resistance to creep, making it ideal for high-pressure applications such as boilers, heat exchangers, and steam pipelines in power plants.
Good Weldability: This steel can be welded under controlled conditions, though preheating and post-weld heat treatment may be necessary to prevent cracking.
Oxidation Resistance: The chromium content of X11CrMo9-1 enhances its ability to resist oxidation, which is important when exposed to high-temperature, oxygen-rich environments.
Corrosion Resistance: The material also exhibits good resistance to corrosion in certain environments, though additional coatings may be required in aggressive chemical conditions.
2. Applications/Industries:
Power Generation: X11CrMo9-1 is commonly used in the power generation industry for manufacturing components like superheaters, reheaters, steam pipes, and boiler tubes, where high temperature and pressure resistance are required.
Petrochemical: It is used in petrochemical plants for critical piping systems and heat exchangers, where high thermal and mechanical stresses are common.
Oil & Gas: The steel is suitable for use in oil and gas production systems, including pipelines, reactor vessels, and pressure vessels exposed to high-pressure and high-temperature environments.
Chemical Processing: X11CrMo9-1 is utilized for reactors, heat exchangers, and other process equipment exposed to elevated temperatures in chemical processing industries.
Heavy Machinery: Used for manufacturing critical components of heavy machinery that are exposed to high temperatures, such as turbine blades, valves, and other high-stress parts.
3. Certifications/Standards:
DIN 17175: X11CrMo9-1 is specified in the DIN 17175 standard, which is used for seamless steel tubes in high-temperature applications.
ISO 9001: This steel is produced under ISO 9001 quality management standards, ensuring consistent product quality and manufacturing reliability.
4. Chemical Composition:
Carbon (C): 0.10% – 0.15%
Manganese (Mn): 0.30% – 0.60%
Chromium (Cr): 9.00% – 10.00%
Molybdenum (Mo): 0.90% – 1.10%
Silicon (Si): 0.20% – 0.50%
Phosphorus (P): 0.025% max
Sulfur (S): 0.010% max
Iron (Fe): Balance
5. Technical Specifications:
Yield Strength:
X11CrMo9-1: 450–600 MPa (depending on heat treatment and thickness)
Tensile Strength:
X11CrMo9-1: 600–750 MPa
Hardness:
X11CrMo9-1: Typically ranges between 200–250 HB (Brinell hardness) depending on heat treatment.