Currently, the domestic spot market is characterized by a strong atmosphere of hesitation. The escalation of trade wars is the main factor weakening the demand for mn seamless pipes. Additionally, the demand for 146*16 seamless steel tubes, affected by seasonal factors, has weakened, as has part of the demand for hot-rolled coils. Under this situation, traders of hot-rolled coils are operating cautiously. From the perspective of steel mills, two mills introduced new spot prices this week, with Shougang raising its price, while the 152*22 seamless steel tubes in Zhangjiakou Xuanhua District remained unchanged, indicating that in the context of environmental protection and production restrictions, steel mills remain strong, with price and cost support still in place. However, this week, the inventory of hot-rolled coils has increased, with an estimated total of ten million tons in domestic hot-rolled coil inventory, an increase of one million tons from last week, raising concerns about the support from inventory on the market side. Moreover, the trend of 152*25 seamless pipes is weaker, and there may be a short-term rebound. In summary, it is expected that the price of hot-rolled coils in the domestic market next week may remain stable but may weaken slightly. The yield point of BQB seamless steel tubes is usually represented as 0. The yield stress is considered an appropriate value. The normalizing operation of k seamless steel tubes: Heat the seamless steel tubes to above Ac or Accm degrees, keep warm, and then cool at a slightly faster rate than the annealing rate. Electrical: gas conveyance, hydropower fluid pipelines. The internal bend at the import of Jinzhou high-alloy steel tubes is due to uneven force on the rolling mill during piercing. After Ef spraying (throwing) rust removal, not only can the physical adsorption on the surface of the tube be expanded, but also the mechanical adhesion between the anti-corrosion layer and the surface of the tube can be enhanced. GB is mainly used to manufacture seamless steel tubes for high-pressure and above-pressure steam boiler pipelines, etc., made of carbon structural steel, alloy structural steel, and heat-resistant stainless steel. Seamless steel tubes are widely used in the manufacture of structural parts and mechanical components, such as oil drilling pipes, automotive drive shafts, seamless bicycle frames, and steel scaffolding used in construction. The reference price of 152*25 seamless steel tubes once again demonstrates the lack of demand during the peak season. In general, shot blasting (sand) is mainly used for internal surface treatment of tubes, while blast (sand) is mainly used for external surface treatment of tubes. When using spraying (throwing) rust removal, several issues should be noted. Many people are not particularly aware of the difference between QB seamless steel tubes and carbon steel seamless steel tubes. Today, let's introduce them in detail! Rolling fold, characteristics: The outer surface of seamless steel tubes shows regular folding defects.