LONG PRODUCTS -Angle for shipbuilding<equal and unequal>

Grade: This section lists various material grades or designations, common for structural steel:

• SS400/SS540: These are Japanese Industrial Standard (JIS) grades for general structural steel. SS400 is a common structural steel with a tensile strength of 400-510 MPa, and SS540 is a higher strength grade.
• A36/D36:
  • A36: American Society for Testing and Materials (ASTM) standard for carbon structural steel.
  • D36: This looks like a grade related to shipbuilding steel (e.g., AH36, DH36, EH36), which are high-strength structural steels commonly used in marine applications.
• ST37-2/ST52-3: These are older German (DIN) or European (EN) designations for structural steel. ST37-2 corresponds roughly to S235, and ST52-3 corresponds roughly to S355, with the numbers indicating yield strength in kgf/mm² (approximately 370 MPa and 520 MPa respectively).
• S235JR/J0, S275JR/J0, S355JR/J0: These are European Standard (EN) grades for structural steel.
  • The numbers (235, 275, 355) represent the minimum yield strength in MPa.
  • JR: Indicates that the steel has a minimum impact energy value at room temperature (20°C).
  • J0: Indicates that the steel has a minimum impact energy value at 0°C.
• etc.: Implies that other grades might also be available.

Size 1:

• 40–150mm*40–150mm*5–12mm: This format suggests dimensions for equal angle steel.
  • The first two numbers (40-150mm) indicate that both legs of the angle range from 40mm to 150mm.
  • The last numbers (5-12mm) indicate the thickness of the angle, ranging from 5mm to 12mm.

Size 2:

• 100–475mm*75–125mm*5–18mm: This format suggests dimensions for unequal angle steel, or possibly channels/beams where the first dimension is the web/height and the second is the flange width.
  • The first range (100-475mm) could be the length of one leg (or web height).
  • The second range (75-125mm) could be the length of the other leg (or flange width).
  • The last range (5-18mm) indicates the thickness. Given the wide range in the first dimension (up to 475mm), it could also refer to a section like a channel or H-beam, where 100-475mm is the height and 75-125mm is the flange width. However, it's most commonly seen in this format for angle steel (unequal).