1. Structure composition Duplex stainless steel: As the name suggests, the microstructure of duplex stainless steel is composed of two phases: ** austenite ** and ** ferrite **, and the usual ratio is 50% austenite and 50% ferrite. This structure gives it excellent strength, corrosion resistance and crack resistance. Ordinary stainless steel: Austenitic stainless steel (such as 304, 316) is mainly composed of austenitic structure, has good toughness and corrosion resistance, but the strength is low. Ferritic stainless steel (such as 430) is mainly composed of ferritic, has high corrosion resistance and good oxidation resistance, but poor toughness, easy to embrittlement. 2. Mechanical properties Duplex stainless steel: Due to the combination of ferritic and austenitic phases, duplex stainless steel usually has higher tensile strength and yield strength, which is higher than austenitic stainless steel and can usually withstand greater loads. Ordinary stainless steel: Austenitic stainless steel has a lower strength, and although it has better ductility and toughness, it may not be as good as duplex stainless steel in applications with high strength requirements. The strength of ferritic stainless steel is higher than that of austenite, but it is relatively brittle. 3. Corrosion resistance Duplex stainless steel: has excellent corrosion...

1. Chemical Composition 304L Stainless Steel: Contains 18%-20% chromium (Cr) and 8%-12% nickel (Ni). The “L” indicates low carbon content, typically ≤0.03%, which improves its weldability. 316L Stainless Steel: Similar to 304L, but with an additional 2%-3% molybdenum (Mo). The molybdenum enhances its corrosion resistance, especially in chloride environments. 2. Corrosion Resistance 304L: Offers good corrosion resistance in most atmospheric and mildly corrosive environments. 316L: The addition of molybdenum gives 316L superior corrosion resistance, particularly in chloride-rich environments like seawater or chemical exposure. 3. Mechanical Properties Both grades have similar mechanical properties, but 316L may offer slightly better performance in certain high-temperature applications. 4. Weldability Both 304L and 316L are low-carbon versions, which give them excellent weldability. 5. Applications 304L: Commonly used in food processing, household items, architectural decoration, medical devices, etc. 316L: Ideal for marine, chemical processing, pharmaceuticals, oil & gas, and other industries where high corrosion resistance is required, particularly in environments involving chlorides and strong acids. 6. Price 316L is generally more expensive than 304L because the addition of molybdenum increases its corrosion resistance but also raises the cost. In summary, 316L is more corrosion-resistant than 304L, especially in harsh chemical or marine environments.   Gavin  +86...

 Stainless Steel Price Fluctuations Stainless steel prices are influenced by various factors, including raw material costs, market demand, global economic trends, and policy changes. Below is an overview of key factors:  **1. Raw Material Costs** The production of stainless steel relies on materials like nickel, chromium, iron ore, and scrap steel. – **Nickel:** As a key component, fluctuations in nickel prices significantly impact stainless steel costs. When nickel prices rise, production costs increase, pushing up stainless steel prices. – **Chromium and Iron Ore:** Changes in the prices of these materials also directly affect production costs. – **Scrap Steel:** Being a recycled resource, variations in scrap steel prices contribute to cost shifts. **2. Production and Supply** Stainless steel production costs are influenced by energy prices, as the smelting process is energy-intensive. – **Energy Prices:** Increases in electricity and natural gas prices can drive up production costs. – **Production Capacity:** The production levels, utilization rates, and technological advancements of manufacturers also impact supply. During periods of high demand, producers may increase output to reduce unit costs, while in low-demand periods, they may scale back to manage inventory.  **3. Demand Fluctuations** Stainless steel is widely used in construction, automotive, appliances, and petrochemical industries....

With the emergence of more and more building materials market, we have all kinds of steel pipes in our life. In order to let more small partners understand the relevant knowledge, we will briefly introduce the differences between seamless steel pipe and slotted steel pipe 1. The processing technology is different Seamless pipe is made of high quality carbon steel or alloy steel. The processing technology of seamless pipe is divided into cold drawing and hot rolling, and the slotted pipe is generally welded. 2. Different uses: Seamless pipe is mainly used for conveying fluid pipes or structural parts, mainly used in the machinery industry, while slotted steel pipe is mainly used in the construction industry, such as water, gas, compressed air and other low-pressure fluid. However, seamless steel pipes are used for pressure pipes. 3. Different prices: Because the production process of seamless steel pipe is more complex, so the price is more expensive than that of slotted steel pipe, and the slotted steel pipe is mainly made of steel plate (steel strip) secondary welding, which is cheap and widely used.

1. Industry Overview Overall Development of the Steel Industry: A summary of the overall economic situation, output value, and growth rate of China’s steel industry. The 2024 report might discuss whether the Chinese steel industry is influenced by the domestic and global economic environment and how it is coping with global economic uncertainties. Position of the Steel Industry: China is the largest steel producer and consumer in the world, accounting for nearly half of the global steel output. The report will discuss China’s dominant position in the global steel market. 2. Steel Production and Supply Total Output: The annual data on crude steel and steel product output in China, including whether there is an increase or decrease in production, and how closely it is linked to domestic and international demand. China typically produces a huge volume of steel, and the report will examine whether this high output continues in 2024 or if there are any reductions in capacity. Capacity Utilization: The overcapacity issue in China’s steel industry remains a key concern. The report may highlight the elimination of outdated capacity, shutdowns, and the situation of new capacity being added in the industry. Production Methods: The proportion of different production methods,...

1. Raw material price Nickel: Nickel is the core raw material for the production of stainless steel, and its price fluctuations directly affect the price of stainless steel. Higher nickel prices, such as due to supply shortages or increased demand, will push up the cost of stainless steel. Chromium and iron ore: Chromium and iron ore are other important raw materials, and fluctuations in the price of these commodities will also affect the production cost of stainless steel. Scrap: As a renewable resource, scrap accounts for a certain proportion in stainless steel production, and the rise in scrap prices will also push up the price of stainless steel. 2. Supply and demand relationship Supply side: Stainless steel producers’ capacity changes, maintenance shutdowns, and line adjustments (such as production cuts or expansions) will affect supply. Demand side: Stainless steel is widely used in construction, automobiles, home appliances, petrochemical and other industries. Fluctuations in demand in these industries can affect prices. Economic growth: When the economy is growing strongly, the demand for stainless steel increases and the price rises. Seasonal demand: for example, the demand for stainless steel in the construction industry is higher in the construction season (spring and autumn). 3....