The following is a detailed analysis of ASTM/ASME A333 GR.6 American standard seamless steel pipe (508 * 9.53):
Material:
ASTM/ASME A333 GR.6 seamless steel pipe is a fine-grained low-temperature toughness steel that uses aluminum deoxidation, and its metallographic structure is a body centered cubic ferrite.
Chemical composition:
The chemical composition of this seamless steel pipe mainly includes elements such as carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), nickel (Ni), chromium (Cr), copper (Cu), vanadium (V), niobium (Nb), and molybdenum (Mo). The specific content is as follows:
Carbon (C): ≤ 0.3%
Manganese (Mn): 0.2-1.06%
Phosphorus (P) and sulfur (S): both ≤ 0.025%
Silicon (Si): ≥ 0.10%
Nickel (Ni), chromium (Cr), and copper (Cu): all ≤ 0.40%
Vanadium (V): ≤ 0.08%
Niobium (Nb): ≤ 0.02% (but based on protocol, smelting analysis can be increased to 0.05%, and finished product analysis can be increased to 0.06%)
Molybdenum (Mo): ≤ 0.12%
Note: When the carbon content is below 0.30%, for every 0.01% decrease, the manganese content can increase by 0.05% above 1.06%, until the maximum allowable manganese content is 1.35%.
Performance characteristics:
ASTM/ASME A333 GR.6 seamless steel pipes have good impact toughness in low temperature environments (usually below -45 ℃), ensuring that low-temperature brittle fracture does not occur during use.
Usage:
This type of seamless steel pipe is mainly used for low-temperature pressure vessel pipelines and low-temperature heat exchanger pipelines. In addition, it is widely used in the production of ethylene, propylene, urea, synthetic ammonia, N-P-K composite fertilizers, as well as washing, purification, desulfurization, and degreasing in the pharmaceutical industry using petroleum, chemical, natural gas, and coal as raw materials, as well as in the manufacturing of cryogenic equipment, ultra-low temperature cold storage, and transportation of ultra-low temperature liquefied gases.
Usage environment:
ASTM/ASME A333 GR.6 seamless steel pipes are mainly used in low-temperature environments, especially under conditions below -45 ℃.
Price:
The price of seamless steel pipes is influenced by various factors, including material, specifications, market supply and demand, production costs, and international economic environment. Therefore, a specific price cannot be provided. But generally speaking, due to the special characteristics of this seamless steel pipe (such as low-temperature toughness), its price may be relatively high.
The impact of the international economic environment on seamless steel pipes:
The changes in the international economic environment have a significant impact on the seamless steel pipe market. For example, during a global economic boom, the demand for seamless steel pipes may increase, driving up prices; During a global economic downturn, demand may decrease, leading to a drop in prices. In addition, factors such as international trade frictions and trade protectionism may also have adverse effects on the export of seamless steel pipes.
Please note that the above information is for reference only, and specific details may vary due to market changes. For more detailed information, it is recommended to consult seamless steel pipe manufacturers or relevant industry experts.