Q: How to judge whether the mechanical properties of Q355 coil are qualified?
A: According to GB/T 1591, take longitudinal samples, and the yield strength, tensile strength, elongation and impact energy must meet the requirements of the corresponding thickness and grade.
Q: What content does the quality certificate of Q355 coil include?
A: Heat batch number, specification, chemical composition, mechanical properties, inspection results, executive standard, delivery status, production date, steel mill seal, etc.
Q: What are the storage precautions for Q355 coil?
A: Moisture and rust prevention, stored in a well-ventilated and dry environment, padded with wood at the bottom, avoiding rain and scratches, the shelf life is generally 6 months (depending on the environment).
Q: What are the equivalent grades of Q355 coil in Europe/USA/Japan?
A: Europe: S355JR/J0/J2 (EN 10025-2); USA: ASTM A572 Grade 50; Japan: SM490YB (JIS G3106). Equivalence does not mean substitution; technical agreement shall be verified.
Q: What should be noted for Q355 coil in foreign trade orders?
A: Clearly specify the executive standard, quality grade, impact temperature, delivery status, flaw detection grade, packaging requirements, and provide third-party inspection reports (such as SGS).