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Bridge
Time:2019-07-10 Source:Tisco Hits:

  By adopting the process including high quality hot iron+ scrap melting, LF+RH refining, precise chemical composition controlling, serous control and nature transforming of inclusion, bridge steel made by TISCO INDUSTRIAL CO.,LIMITED has stable and excellent comprehensive properties, such as high strength, high toughness, low yield strength ratio, high lamellar tearing resistance and easy welding, capable of meeting the quality requirement of large highway and railway bridges.

  Typical Steel Grades/Specifications

Steel/Grades

Specifications

Size Range

Delivery condition

Q235qC/D/E
Q345qC/D/E
Q370qC/D/E
Q420qC/D/E

GB/T714 OR Technical Agreement

5~12

AR/NR/N/TMCP

>12~100

CR/NR/N/TMCP

>100~150

CR/NR/N

>150~250

N

Q460qC/D/E

5~12

AR/NR/N/TMCP/QT

>12~100

CR/NR/N/TMCP/QT

>100~150

N/QT

Q500q/D/E
Q550q/D/E

5~70

TMCP/TMCP+T/QT

>70~150

TMCP+T/QT

A709 Gr36(250)
A709 Gr50(250)

ASTM A709/A709M or Technical Agreement

5~12

AR/NR/N/TMCP

>12~100

CR/NR/N/TMCP

>100~150

N

A709 Gr50W(345W)
A709 HPS Gr50W(345W)

5~100

AR/NR/TMCP/QT

A709 HPS Gr70W(485W)

5~100

TMCP/TMCP+T/QT

A709 HPS Gr70W(690W)

5~100

QT

S235J0/JR/J2/N/NL/M/ML
S275J0/JR/J2/N/NL/M/ML
S355J0/JR/J2/K2/N/NL/M/ML
S450J0
S420/N/NL/M/ML
S460/N/NL/M/ML
S500Q/QL/QL1
S690Q/QL/QL1

EN10025 or Technical Agreement

5~12

AR/NR/N/TMCP

>12~100

CR/NR/N/TMCP

>100~150

CR/NR/N

>150~250

N

  Chemical Composition (wt%)

Grades/Grade

C

Si

Mn

P

S

Nb、V、Ti

Q345q

≤0.18

0.15-0.40

≤1.7

≤0.015

≤00.005

Nb+V+Ti≤0.12

Q370q

≤0.18

0.15-0.40

≤1.7

≤0.012

≤00.005

Nb+V+Ti≤0.12

Q420q

≤0.18

0.15-0.40

≤1.7

≤0.012

≤00.005

Nb+V+Ti≤0.12

Q460q

≤0.18

0.15-0.40

≤1.7

≤0.012

≤00.005

Nb+V+Ti≤0.12

Q500q

≤0.09

0.15-0.40

≤1.7

≤0.010

≤00.005

Nb+V+Ti≤0.12

A709 Gr.50

≤0.18

0.15-0.40

≤1.6

≤0.015

≤00.005

Nb+V+Ti≤0.12

A709 HPS 70W

≤0.11

0.15-0.40

≤1.5

≤0.012

≤00.005

Nb+V+Ti≤0.12

  Mechanical Properties

Grades

Size (mm)

Rel (Mpa)

Rm (Mpa)

A%

-40℃ KV2 ( J)

Q370qE

10

420

565

28

169

60

416

570

32

296

Q420qE

10

485

640

31

202

60

470

620

32

310

Q460qE

40

526

672

29

265

100

496

630

28

212

Q500qE

20

570

695

26

320

64

555

680

25

310


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