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Q345FRB Q345FRC Q345FRD refractory structural steel supplier steel plate

Q345FR series steel is a fire-resistant steel plate for building structures. Q345FRB Q345FRC Q345FRD Refractory structural steel can be used in the construction of office buildings, shopping malls, hotels, factories, stadiums, stations, high-rise steel structure buildings.

Q345FRB Q345FRC Q345FRD steel chemical composition (%, melting analysis)


Grades

C

Si

Mn

P

S

Mo

Nb

Cr

V

Ti

Al

Max.

Min.

Q345FRB

0.2

0.55

1.6

0.025

0.015

0.9

0.1

0.75

0.15

0.05

0.015

Q345FRC

0.2

0.55

1.6

0.025

0.015

0.9

0.1

0.75

0.15

0.05

0.015

Q345FRD

0.18

0.55

1.6

0.02

0.015

0.9

0.1

0.75

0.15

0.05

0.015

Q345FRE

0.18

0.55

1.6

0.02

0.015

0.9

0.1

0.75

0.15

0.05

0.015

 Mechanical properties of Q345FRC steel


Grades

Tensile test

V-shaped impact test

Yield strength MPa, in thickness mm

Tensile strength, MPa

Elongation, %

Flex-strength ratio

Test temperature ℃

Absorb energy J

≤16

16-63

63-100

Q345FRB

≥345

345-465

335-455

≥490

≥22

≤0.83

20

≥34

Q345FRC

≥345

345-465

335-455

≥490

≥22

≤0.83

0

Q345FRD

≥345

345-465

335-455

≥490

≥22

≤0.83

-20

Q345FRE

≥345

345-465

335-455

≥490

≥22

≤0.83

-40

 Q345FRC steel sheet delivery status is hot rolling, controlled rolling, normalizing, normalizing rolling, thermomechanical rolling (TMCP), TMCP+T (tempering). As a leading refractory structural steel supplier in China, we can supply Q345FRB Q345FRC Q345FRD steel plates with high quality.

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