Question 1: What standard does S235J0 steel pipe comply with, and what material is it equivalent to in China?
The implementation standard of S235J0 is EN10025, which is equivalent to China's national standard Q235C, which is used to specify the requirements of carbon structural steel.
Question 2: What are the chemical compositions of S235J0 steel pipes?
The chemical composition of S235J0 steel pipes includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni), copper (Cu), molybdenum (Mo) and nitrogen (N). The specific content requirements are: C maximum value 0.17 (for profiles with a nominal thickness of 100mm, the C content is negotiated), Mn maximum value 1.4, P maximum value 0.03, S maximum value 0.03 (for long products, if the morphology of sulfides in the steel is changed, the maximum value of S content is increased by 0.015% to improve the mechanical properties, and the chemical composition is the minimum value of 0.0020% Ca), Cu maximum value 0.55 (if the Cu content exceeds 0.40%, hot brittleness may be caused during heat setting), N maximum value 0.012 (if the chemical composition is the minimum value of 0.020% of the total aluminum content or the minimum value of 0.015% of the aluminum acid solution or when other nitrogen binders are present, the maximum value of nitrogen is not used). If other elements are added, they should be reflected in the inspection documents.
Question 3: What are the mechanical properties of S235J0 steel pipes?
The mechanical properties of S235J0 steel pipes vary according to the nominal thickness. Its tensile strength is 360 - 510MPa within a certain thickness range, and the yield point varies in different thickness ranges, such as ≥235MPa for 3mm and below, ≥235MPa for 3 - 16mm, etc. The elongation or elongation after fracture also varies with thickness, for example, ≥26% for nominal thickness 3 - 16mm, ≥26% for 16 - 40mm, etc. At the same time, when the nominal thickness is t≤1, the elongation after fracture δ≥17; when the nominal thickness is 1＜t≤1.5, the elongation after fracture δ≥18; when the nominal thickness is 1.5＜t≤2, the elongation after fracture δ≥19; when the nominal thickness is 2.5＜t≤3, the elongation after fracture δ≥21
Question 4: What are the advantages of S235J0 steel pipe?
S235J0 steel plate (steel pipe has some characteristics as well) has the advantages of beautiful surface and diversified use possibilities, good corrosion resistance, high strength, so the possibility of thin plate use is large, high temperature oxidation resistance and strength can resist fire, high cleanliness and finish, good welding performance, etc.
Question 5: What are the steel specifications of S235J0 steel pipe?
S235J0 steel pipe steel specifications include round bars, forged round bars, round steel, plates, sheets, forgings, plates, round steel, forged rounds, forgings, coils, strips, small round bars, etc.
