Q355 Steel: Q355B Q355C Q355D Properties & Equivalent

Q355 Steel Overview:

Q355 steel is a Chinese low-alloy high-strength structural steel that comes in different grades, such as Q355B, Q355C, and Q355D. These variations offer different properties suited for various applications in construction and engineering.

Properties of Q355B, Q355C, Q355D:

Q355B:

Yield Strength: ≥ 355 MPa

Tensile Strength: 470-630 MPa

Elongation: ≥ 22%

Impact Test Temperature: 0°C

Q355C:

Yield Strength: ≥ 345 MPa

Tensile Strength: 490-630 MPa

Elongation: ≥ 22%

Impact Test Temperature: 0°C

Q355D:

Yield Strength: ≥ 335 MPa

Tensile Strength: 470-630 MPa

Elongation: ≥ 21%

Impact Test Temperature: -20°C

Equivalent Grades:

Equivalent to Q355B:

ASTM A572 Grade 50

DIN St52-3

EN S355JR

Equivalent to Q355C:

ASTM A572 Grade 65

DIN St52-3N

EN S355J0

Equivalent to Q355D:

ASTM A572 Grade 60

DIN St52-3U

EN S355J2

Applications:

Q355 steel grades are commonly used in construction, bridges, buildings, machinery, and other structural applications requiring high-strength components.

These grades offer good weldability, machinability, and corrosion resistance in various environments.

For the most current and precise information, always refer to the latest versions of Chinese standards (GB/T) or consult with industry experts familiar with Chinese steel grades and specifications.