Compared with solid steel materials such as round steel, 20cr alloy pipe is lighter in weight when the bending and torsional strength is the same.
20cr alloy pipe is an economical cross-section steel that is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction.
Using 20cr alloy tubes to manufacture ring-shaped parts can improve material utilization, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sets, etc., which are now widely manufactured with steel pipes.
20cr alloy pipe is also an indispensable material for various conventional weapons. Gun barrels, barrels, etc. are all made of steel pipes.
20cr alloy pipes can be divided into round pipes and special-shaped pipes according to different cross-sectional area shapes. Since the circle area is the largest when the circumferences are equal, more fluid can be transported with circular tubes. In addition, the circular cross section is relatively uniformly stressed when subjected to internal or external radial pressure. Therefore, the vast majority of steel pipes are round pipes.
20cr alloy pipe implementation standards: GB5310-1995, GB17396-1998, DIN17175-79, GB6479-2000, GB9948-1999, etc.
Weldability of 20cr alloy pipe:
1. 20Cr is pearlite and can be welded. 20Cr steel has better weldability and generally does not require heat treatment after welding;
2. Parts with a thickness greater than 15mm need to be preheated to 100~150℃ before welding. If the requirements are not high, preheating before welding is not required, and tempering heat treatment is not required after welding.
