1. Different chemical composition
The chemical composition of S275JR material includes: carbon, manganese, phosphorus, sulfur, nitrogen, copper, etc.
The chemical composition of domestic Q235B material includes: carbon, silicon, manganese, sulfur, phosphorus, chromium, nickel, copper, etc.
2. Different uses
The material of S275JR is general carbon structural steel.
The domestic Q235B material is carbon steel for special purposes, such as bridge steel, marine steel, etc. It is mainly used for welded structural parts with high quality requirements in construction and bridge engineering.
3. Different experimental techniques
S275JR is usually not subjected to heat treatment. If required, impact energy tests at room temperature of 20°C, 0°C, and -20°C can also be performed.
Q235B is for impact test at room temperature, V-notch, design pressure P≤1.6MPa, and operating temperature is 0～350℃.
4. Different performance
S275JR is generally steel rods, steel plates, steel strips, wire rods, and forgings with excellent strength.
Q235B has certain elongation, strength, good toughness and castability, and is easy to punch and weld.
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
