LONG PRODUCTS -UPN/UPE

Grade: This section lists several common international structural steel grades:

• Q235 / Q345: Chinese National Standards (GB) for carbon structural steel, indicating minimum yield strengths of 235 MPa and 345 MPa respectively.
• SS400: Japanese Industrial Standard (JIS) for general structural steel, with a tensile strength of 400-510 MPa.
• S235JR / S275JR / S355JR: European Standards (EN) for structural steel. The numbers (235, 275, 355) represent the minimum yield strength in MPa, and "JR" indicates that the steel has a minimum impact energy value at room temperature.

Size: This section lists standard profiles, most notably European standard channels:

• UPN 50 / UPN 80 / UPN 100 / UPN 120 / UPN 140 / UPN 160 / UPN 180 / UPN 200: UPN stands for "Universal Parallel Norm" or "U-profile Normal." These are standard European U-shaped channel sections with tapered flanges. The numbers (50, 80, 100, etc.) refer to the nominal height of the channel in millimeters (e.g., UPN 100 is 100mm high).
• UPE 50 / UPE 80 / UPE 100 / UPE 120 / UPE 140 / UPE160 / UPE180 / UPE 200: UPE stands for "U-profile Economical" or "U-profile with Parallel Flanges." These are also standard European U-shaped channel sections, but unlike UPN, they have parallel flanges, which can sometimes simplify connections and fabrication. The numbers again refer to the nominal height of the channel in millimeters.