The difference between S275JR steel and S355JR H-beam HEA100
Chemical composition
S275JR structural h beam: carbon content ≤0.24%, manganese content ≤1.60%, phosphorus content ≤0.045%, sulfur content ≤0.045%, copper content ≤0.60%, nitrogen content ≤0.014%.
S355JR structural steel h beam: carbon content ≤0.27%, silicon content ≤0.6%, manganese content ≤1.70%, phosphorus content ≤0.045%, sulfur content ≤0.045%, copper content ≤0.60%, nitrogen content ≤0.014%. The upper limit of carbon content of S355JR is relatively high, and it contains a certain amount of silicon. The overall content of alloy elements is slightly higher than that of S275JR h beam material.
Mechanical properties
S275JR h beam structure: yield strength is 275MPa, tensile strength is 410-560MPa, elongation after fracture is ≥23% (thickness 3mm≤t≤40mm), impact energy is ≥27J at 20℃.
S355JR h section beam: yield strength is 355MPa, tensile strength is 470-630MPa, elongation after fracture is ≥22% (thickness 3mm≤t≤40mm), impact energy is ≥27J at 20℃. The yield strength and tensile strength of S355JR h beam steel structure are higher than those of S275JR h section steel beams. The elongation of S275JR is relatively high and the plasticity is slightly better.
Application
S275JR H-shaped steel HEA100: Suitable for general building structures with relatively low strength requirements, such as some non-main load-bearing components of ordinary industrial and civil buildings, etc., which can meet general load-bearing and use requirements. Due to its relatively low cost, it is more commonly used in some projects with high economic requirements.
S355JR H-shaped steel HEA100: Commonly used in important structures with high strength and stability requirements, such as key support structures of high-rise buildings, load-bearing components of large-span bridges, brackets of large industrial equipment, etc., which can withstand large loads and complex stress conditions.