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Q355

Q355 is a high-strength low-alloy (HSLA) structural steel that contains phosphorus, sulfur, and microalloys, such as niobium, vanadium, titanium, and others.

Q355B Steel plate

Q355 steel plate

Q355 steel is a Chinese low alloy high strength structural steel, which replaced Q345, the material density is 7.85 g/cm3. According to GB/T 1591 -2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D. “Q” is the first letter of Chinese Pinyin: “qu fu dian”, which means Yield Strength, “355” is the minimum value of yield strength 355 MPa for steel thickness ≤16mm, and tensile strength is 470-630 Mpa.
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