For the 114.3 * 8.56 seamless steel pipe of ASME A335 P91 alloy high-pressure boiler tube, the following is an analysis of its material, chemical composition, performance characteristics, use, usage environment, and impact on the international economic environment:

Material and chemical composition:

ASME A335 P91 seamless steel pipe belongs to heat-resistant alloy steel, mainly used for work under high pressure and high temperature conditions.

In terms of chemical composition, it mainly includes elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), molybdenum (Mo), nickel (Ni), vanadium (V), nitrogen (N), aluminum (Al), titanium (Ti), and niobium (Nb). The specific content is specified in detail according to ASME standards.

Performance characteristics:

ASME A335 P91 seamless steel pipe has high high-temperature strength and excellent oxidation resistance, enabling it to maintain good mechanical properties and stability at high temperatures.

This material also has good processing performance, making it easy to process and manufacture.

Compared to other heat-resistant steels, P91 steel has more outstanding thermal strength performance at high temperatures, for example, its thermal strength at 600 ℃ is three times that of P9 steel.

Usage:

ASME A335 P91 seamless steel pipe is mainly used to manufacture steel pipes for high-temperature superheaters and reheaters of subcritical and supercritical boilers with wall temperatures ≤ 625 ℃ for large generator units.

It is also suitable for the manufacturing of high-temperature boilers, superheaters, heat exchangers, and pipe fittings used in the petrochemical industry.

It is also widely used in fields such as nuclear electric heat exchangers and furnace tubes in petroleum cracking units.

Usage environment:

ASME A335 P91 seamless steel pipe is commonly used in harsh environments with high temperature and pressure, such as power plant boilers, petrochemical industry, and other fields.

In these environments, steel pipes need to withstand various challenges such as high temperature, high pressure, and corrosion.

Affected by the international economic environment:

The changes in the international economic environment may have an impact on the price and market demand of alloy seamless steel pipes.

For example, when the global economy is booming, investment in fields such as power plant boilers and petrochemicals may increase, thereby driving up demand and prices for alloy seamless steel pipes.

On the contrary, when the global economy is in a downturn, investment in these areas may decrease, leading to a decrease in demand for alloy seamless steel pipes and a decline in prices.

Please note that the above analysis is based on general circumstances and conventional data, and the specific situation may vary depending on factors such as actual application environment, market demand, and supply situation.