What material is P91 and what material is P91

The P91 belongs to the American Standard.

Martensitic heat-resistant steel, implementation standard.

astm a335/a335m-2018

P91 can be used as a steel tube for high-temperature superheaters and reheaters for subcritical and supercritical boilers with a wall temperature of 625, as well as high-temperature headers and steam pipes with a wall temperature of 600, as well as as a nuclear power heat exchanger and a furnace tube for oil crackers.

The chemical composition of p91 is shown in the figure below

P is the code of steel pipe steel, P91 is an alloy high-temperature steel pipe, the main component is carbon steel, and the temperature resistance is above 600 degrees.

The corresponding forging material is F11

P91 is not only high in antioxidant properties.

performance and resistance to high-temperature vapor corrosion, but also has good impact toughness and high and stable long-lasting plasticity and thermal strength. When the operating temperature is lower than 620, its allowable stress is higher than that of austenitic stainless steel.

Above 550, the recommended design allowable stress is about twice that of t9 and steel.

<> refers to a type of steel that is resistant to high temperatures. The material includes carbon, manganese, silicon, chromium, nickel and other elements, as well as some impurities such as phosphorus and sulfur. The tensile strength of the material is greater than or equal to 585MPa, and the elongation is greater than or equal to 20%.

The material has a low carbon content and requires strict control of the content of impurities phosphorus and sulfur. In addition, the material also contains chemical elements such as vanadium and niobium. The material has strong high temperature resistance, the material is relatively light, the support is also convenient, and the design is relatively convenient, so it is widely used in the construction of electric fields.

P91 steel is a new type of martensitic heat-resistant steel jointly developed by the National Elephant Tree Ridge Laboratory and the Metallurgical Materials Laboratory of the American Combustion Engineering Corporation.

P91 steel is equivalent to the national standard 10Cr9Mo1VNBN, which not only has high oxidation resistance and high temperature steam corrosion resistance, but also has good punching toughness and high and stable long-lasting plasticity and thermal strength. When the operating temperature is lower than 620, its allowable stress is higher than that of austenitic stainless steel. Above 550, the recommended design allowable stress is about twice that of t9 and steel.

P91 is an alloy steel material used under high temperature and pressure, which has the characteristics of heat and pressure resistance. It is mainly used to manufacture power station boiler piping system with a large amount of bright and rotten high-temperature steam as the working medium, and has good stability and corrosion resistance under high temperature and high pressure.

One of the advantages of P91 is that it has a high material hardness, high tensile strength and impact toughness, and good durability. At the same time, P91 material also has excellent heat resistance, corrosion resistance and chemical stability, which can resist the corrosion of a variety of strong acids, strong alkalis and high temperature and high pressure trapped oxidizing environments, which is very suitable for the manufacture of high temperature and high pressure equipment.

In addition, the production and use of P91 material has also attracted attention to environmental issues. Because the production and use of P91 material requires a large amount of energy and environmental resources, how to improve energy utilization efficiency and material utilization rate while reducing one-time use will be an important direction for the production and application research of P91 material in the future.

P91 steel is a new type of martensitic heat-resistant steel developed by the National Elephant Tree Ridge Laboratory and the Metallurgical Materials Laboratory of Combustion Engineering Corporation of the United States.

P91 steel is equivalent to the national standard 10Cr9Mo1VNBN, which not only has high oxidation resistance and high temperature steam corrosion resistance, but also has good impact toughness and high and stable long-lasting plasticity and thermal strength properties. When the operating temperature is lower than 620, its allowable stress is higher than that of austenitic stainless steel. Above 550, the recommended design allowable stress is about twice that of t9 and steel.