Precision seamless steel tube can choose electrode: 1. The manual electric arc welding, the strength grade for t-50 electrode: 506, 507, 502, 503, 552, 553, etc; 2. Automatic submerged arc welding, choose flux: 431 and 350, with H08A, H08MnA, H10MnA or H10MnSi electrode; 3. The CO2 gas shielded welding, often use H08Mn2Si and H10MnSi.
Precision tube is a kind of important steel pipe type, in many cases are available, in general, should pay attention to all kinds of precision tube in building engineering construction, also want to pay attention to the choice stainless steel 304 pipes of materials, is commonly used, especially in railway construction, bridge construction, and are able to use in the workshop and factory building. Precision tube rely on is the traditional process, is based on the endurance and stress, and strong ability to resist corrosion and acid and alkali resistant, so precision tube under various environmental conditions can be used.
Pure thick wall seamless steel tube rolling crack situation: thick-walled seamless steel pipe steel hot rolling crack location 38118 m away from the strip head respectively, mainly is located in the middle of the strip. By rolling crack of big hole morphology speculate that tear started in the middle of the strip width, the reason is that in the process of rolling rolling Precision steel tubes force and shear force caused by rupture tensile and the formation of a clear macro big hole morphology. Cold rolled seamless steel pipe steel in the production process of interruption with fracture surface is smooth, no obvious surface defect before and after fracture. And observation of fracture microscopic morphology, visible toughening, typical ductile fracture morphology, fracture presents layered shape at the same time, the center of toughening nest is bigger, near the surface of toughening fossa narrow, crack spread present mainly center fracture extension type fracture morphology, fracture depth is deeper, the center at that this broken belt of layered morphology is closely related to the center segregation situation.
If you want to welding # 20 material pipe should use what type of electrode, there are no other type of electrode can choose? If welding # 20 material plate should be using what type of electrode precision seamless steel tube is Precision Welded pipes on the basis of Q235 added about 1% of manganese, so the welding performance good; Precision seamless steel tube and the welding performance of ordinary carbon structural steel, 20 steel can be used to produce 422, 423, 424, produce 425; The occasion of high strength with 506, 507. Precision seamless steel tube is on the basis of Q235 added about 1% of manganese, so the welding performance good; 304 steel in the 102, 107, the 002 electrode.