The differences between 40CrMo seamless steel tubes and 40Cr seamless steel tubes, and how to choose them? 42CrMo is an alloy structural steel with a carbon content of 0.38--0.45%, containing 0.9--1.2% chromium and 0.15--0.25% molybdenum, with a tensile strength of 1100MPa and a yield point of 950MPa. It is used for components that require high reliability under heavy loads, such as large gears for locomotive traction, turbocharger drive gears, pressure vessel gears, rear axles, loaded connecting rods, and spring clamps. It can also be used for the joints of oil well drill pipes below 2000m and recovery tools, as well as for bending machine molds.

Differences between 40CrMo seamless steel pipes and 40Cr seamless steel pipes, and how to choose? 42CrMo is an alloy structural steel with a carbon content of 0.38--0.45%, chromium content of 0.9--1.2%, and molybdenum content of 0.15--0.25%. It has a tensile strength of 1100MPa and a yield point of 950MPa. It is used for components that require high reliability under heavy loads, such as large gears for locomotive traction, turbocharger drive gears, pressure vessel gears, rear axles, loaded connecting rods and spring clips. It can also be used for drilling rod joints and retrieval tools in oil wells below 2000m, as well as molds for bending machines.

40Cr is an alloy structural steel with a carbon content of 0.37-0.45% and chrome content of 0.8-1.1%. It boasts a tensile strength of 1000MPa and a yield point of 800MPa, suitable for parts under heavy loads. Heat-treated 40Cr steel is used to manufacture components for medium loads and speeds, such as automotive steering knuckles, rear axles, gears, shafts, worm gears, spline shafts, and bushes on machine tools. Quenched and tempered at medium temperatures, it is ideal for parts subjected to high loads, impacts, and medium speeds, like gears, main shafts, oil pump rotors, sliders, and rings. After quenching and low-temperature tempering, it is suitable for heavy loads with low impact, offering good wear resistance for components with a solid cross-sectional thickness under 25mm, such as worm gears, main shafts, shafts, and rings. Tempered and surface淬火 at high frequency results in parts with high surface hardness and wear resistance without significant impact, including gears, sleeves, shafts, main shafts, crankshafts, spindles, pins, connecting rods, bolts, nuts, intake valves, etc. Additionally, this steel is suitable for making transmission components treated with carbonitriding, such as large-diameter gears and shafts with good low-temperature toughness.

Therefore, when selecting 42CrMo seamless steel tubes and 40Cr seamless steel tubes, choose based on your actual application requirements.

42crmo Steel Pipe Manufacturer's Pricing

As of March 10th, the price of 42CrMo steel pipes in Yuncheng showed a gradual decline. At the time of this report, Haisin Φ18-22 rebars were mainly quoted at 4470, while Φ6-8 wire rods were at 4610; Jianbang Φ18-22 rebars were at 4490, and Φ6-8 wire rods were at 4630; Xinjinshan Φ18-25 rebars were quoted at 4510 (weight basis); Φ6-8 wire rods were at 4580.

Steel mills: Today, Shanxi Jianlong's factory policy remains stable.

Early morning market sentiment was cautious, with 42CrMo steel pipe prices stable compared to yesterday but with multiple days of underperforming transactions. Coupled with the frequent appearance of low-priced resources from outside, some traders are considering making concessions for cash. In the afternoon, the market plummeted further, with mainstream prices falling by 20-30 yuan/ton. However, it is understood that there are not many low-cost resources left in the market, and traders are mostly clearing inventories and waiting for a rebound, taking the opportunity to restock. Looking ahead, traders expect a bearish trend, believing that a post-holiday round of adjustments is imminent. Operationally, they should speed up arbitrage. However, as traders liquidate their early winter stockpiles, resources are concentrated at the top, increasing the steel mills' pricing power, which will likely lead to a rapid stabilization and rebound in the later period. Overall, it is expected that 42CrMo steel pipes in Yuncheng will remain weakly stable in the short term. Liaocheng processing factory for 42CrMo seamless steel pipes.

42CrMo Seamless Steel Pipe Liaocheng Processing Factory 42CrMo is a steel grade that falls under the category of ultra-high strength steel, known for its high strength and toughness. It also boasts good hardenability and lacks significant temper brittleness. After heat treatment, it exhibits high fatigue strength and resistance to multiple impacts, as well as excellent low-temperature toughness. This steel is suitable for manufacturing large and medium-sized plastic molds that require a certain level of strength and toughness.

42CrMo seamless steel tubes are mainly used for manufacturing forgings with higher steel strength and larger tempering cross-sections, such as large gears for locomotive traction, turbocharger drive gears, pressure vessel gears, rear axles, loaded connecting rods, and spring clamps. They can also be used for drilling pipe joints and recovery tools for oil wells below 2000 meters, as well as for bending machine molds.

Measures to address high-temperature temper brittleness include: (1) Using oil or water quenching after high-temperature tempering to prevent impurity elements from segregating at grain boundaries; (2) Using molybdenum-containing precision bright pipes, where increasing molybdenum content in steel to 0.7% significantly reduces the tendency for high-temperature temper brittleness. Beyond this limit, in 42CrMo seamless steel tubes, a special molybdenum-rich carbide forms, reducing molybdenum content in the matrix, but increasing the brittleness tendency of precision bright pipes; (3) Reducing the content of impurity elements in 42CrMo seamless steel tubes; (4) For parts that operate long-term in the high-temperature temper brittleness zone, even adding molybdenum is insufficient to prevent brittleness. Only by reducing impurity elements in 42CrMo seamless steel tubes, improving the purity of precision bright pipes, and supplementing with the composite alloying of aluminum and rare earth elements can high-temperature temper brittleness be effectively prevented.