Austenitic stainless steel refers to stainless steel having an austenitic structure at high temperatures and normal temperatures. When the steel contains about 18% Cr, 8%-10% Ni, and about 0.1% C, it has a stable austenite structure. Austenitic chrome-nickel stainless steel includes the famous 18Cr-8Ni steel and high-Cr-Ni series steel which is developed by adding Cr, and Ni content and adding elements such as Mo, Cu, Si, Nb, and Ti. SS pipe suppliers in UAE are non-magnetic and have high toughness and plasticity, but their strength is low. It is impossible to strengthen it by phase transformation. It can only be strengthened by cold working. For example, adding elements such as S, Ca, Se, and Te has good Easy machinability.
When the pitting resistance equivalent value of chromium-nickel austenitic stainless steel (PREN=[Cr]+3.3[Mo]+16[N]) ≥40%, it can be called super austenitic stainless steel. Super austenitic stainless steel is mainly used to solve the problems of pitting corrosion and crevice corrosion resistance and high thermal stability of the original high molybdenum (>4%) chromium-nickel austenitic stainless steel under the severe corrosion conditions
Duplex stainless steel has α+γ dual-phase structure, so its performance characteristics are characterized by austenitic stainless steel and ferritic stainless steel. It is a kind of stainless steel with the best strength and corrosion resistance.
Corrosion-resistant and high-temperature resistant alloys include nickel-based alloys and iron-based alloys. They have high strength and corrosion resistance at 650-1000 °C. They are a class of alloys with good comprehensive performance and a wide application range.
Ferritic stainless steel is a kind of stainless steel with a body-centered cubic structure, carbon content of ≤0.02%, the chromium content of 10.5%~32%, ferrite structure at high temperature and room temperature, and also a kind of heat treatment. Stainless steel strengthens it.
Different types and quantities of strengthening elements are added to the chemical composition of stainless steel and different types and quantities of carbides, nitrides, carbonitrides and intermetallic compounds are precipitated by precipitation hardening process, which not only improves the strength of steel but also maintains sufficient toughness. A class of high-strength stainless steel.
Composite materials, due to the combination of different material properties and excellent performance, as well as outstanding economics, have become the trend of development in various industries around the world. The bimetallic composite pipe is also widely used in high temperature, high pressure, and high corrosion because of its perfect combination of the function of the corrosion-resistant alloy layer and the pressure resistance function of the carbon steel base layer and the cost advantage of stainless steel and nickel alloy pure metal pipe. In the oil and gas pipeline of the environment (hydrogen sulfide, chloride ion).
Titanium alloy can be divided into three categories according to its structure: 1. Adding aluminum and tin to titanium; 2. Adding alloying elements such as aluminum, chromium, molybdenum, and vanadium to titanium; 3. Adding elements such as aluminum and vanadium to titanium, which have high mechanical properties. Excellent punching performance and various forms of welding. The strength of the welded joint can reach 90% of the strength of the base metal, and the cutting performance is good. Titanium tubes have high corrosion resistance to chlorides, sulfides, and ammonia. The corrosion resistance of titanium in seawater is higher than that of aluminum alloy, stainless steel, and nickel-based alloy. Titanium is also resistant to water shock.