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Steel Products

Structural steel for Bridge

Structural steel for Bridge
  • ProductsStructural steel for Bridge

Detailed

l   Product overview
Structural steel plates for bridge are the plates specially for manufacturing constructional opponents of bridges, the steel grades of which are carbon steel and low alloy steel. Bridges are the key part in the infrastructure construction of road transportation and with the rapid growth of the economy, the requirements on bridge quality is becoming more and more higher. In recent years, the frequent accidents of bridge collapse have brought forward even stricter requirements on bearing capacity and safety of bridge. It’s a tendency that bridge plates will be selected to build steel structure bridges in the future. More and more railways and highways are being changed into viaduct to save land and reduce the damage to the natural environment. Even though the bridge steel plates are just conventional steel, it has a huge potential for development.

l  Steel grade and Size
Size, steel grade and as-rolled status

 

Structural Steel for Bridge

Standard

Steel Grade

Product Size (mm)

As-rolled status

Chinese Standard

GB/T714, technical agreements

Q345qC, Q345qD, 345qE,  Q370qC, Q370qD, Q370qE, Q420qC, Q420qD, Q420qE, Q460qC, Q460qD, Q460qE

6-80 *1600-3200

AR, CR, TMCP, N

European standard

EN 10025

S235J2, S235JO, S235JR, S275JR, S355J2, S355JO, S355JR, S355K2, S355NL, S355M, S355ML, S420M, S460M

6-80*1600-3200

AR, CR, TMCP, N

American standard

ASTM

A709-50T, A709-50F, A709Gr50

6-100 *1600-3200

AR, CR, N

Chemical composition Wt%
Chinese standard:

 

Steel grade

Rank

C

Si

Mn

P

S

Cr

Ni

Cu

B

N

Als

Q235q

C

≤0.17

≤0.35

≤1.40

≤0.030

≤0.030

≤0.30

≤0.30

≤0.30

/

≤0.012

≥0.015

D

≤0.025

≤0.025

≤0.80

≤0.50

≤0.55

E

≤0.020

≤0.010

≤0.50

Q345q

C

≤0.20

≤0.55

0.90-1.70

≤0.030

≤0.025

≤0.50

D

≤0.18

≤0.025

≤0.020

≤0.50

E

≤0.18

≤0.020

≤0.010

≤0.50

Q370q

C

≤0.18

1.00-1.70

≤0.030

≤0.025

≤0.50

≤0.004

D

≤0.025

≤0.020

≤0.50

E

≤0.020

≤0.010

≤0.70

Q420q

C

≤0.18

1.00-1.70

≤0.030

≤0.020

≤0.70

D

≤0.025

≤0.020

≤0.70

E

≤0.020

≤0.010

≤0.70

Q460q

C

≤0.18

1.00-1.80

≤0.030

≤0.020

≤0.70

D

≤0.025

≤0.015

≤0.70

E

≤0.020

≤0.010

≤0.70

European standard:

 

Steel grade

Max.ofC content in below nominal thickness (mm)

Si max.

Mnmax.

Pmax.

Smax.

Nmax.

Cumax.

≤16

> 16~40

> 40

S235JR

0.17

0.17

0.20

1.40

0.035

0.035

0.012

0.55

S235J0

0.17

0.17

0.17

1.40

0.030

0.030

0.012

0.55

S235J2

0.17

0.17

0.17

1.40

0.025

0.025

-

0.55

S275JR

0.21

0.21

0.22

1.50

0.035

0.035

0.012

0.55

S275J0

0.18

0.18

0.18i

1.50

0.030

0.030

0.012

0.55

S275J2

0.18

0.18

0.18i

-

1.50

0.025

0.025

-

0.55

S355JR

0.24

0.24

0.24

0.55

1.60

0.035

0.035

0.012

0.55

S355J0

0.20

0.20

0.22

0.55

1.60

0.030

0.030

0.012

0.55

S355J2

0.20

0.20

0.22

0.55

1.60

0.025

0.025

-

0.55

S355K2

0.20

0.20

0.22

0.55

1.60

0.025

0.025

-

0.55

S355NL

0.18

0.50

0.90-1.65

0.025

0.020

-

0.55

S355ML

0.14

0.50

1.60

0.025

0.020

-

0.55

American standard:

 

Steel grade

C

Mn

Si

P

S

Nb

A709-50T, A709-50F, A709Gr50

≤0.23

≤1.35

≤0.4

≤0.04

≤0.05

0.0050.05

 

Property indexes
Chinese standard

 

Steel grade

Rank

Tensile test (widthways)

V type impact test (lengthways)

Yield strength
ReL/MPa

Tensile strength
Rm/MPa

Elongation after fractureA/%

Test temperature /

Impact energy absorption KV2/J

Thickness/mm

≤50

50-100

Not less than

Not less than

Q235q

C

235

225

400

26

0

34

D

-20

E

-40

Q345q

C

345

335

490

20

0

47

D

-20

E

-40

Q370q

C

370

360

510

20

0

47

D

-20

E

-40

Q420q

C

420

410

540

19

0

47

D

-20

E

-40

Q460q

C

460

450

570

17

0

47

D

-20

E

-40

European standard:

 

Steel grade

Max yield strength ReH (widthways), MPa

Tensile strength

Rm, MPa

Elongation A, %

Impact, KV2 (lengthways)/J

Thickness (mm)

≤16

>16~40

>40~63

>63~80

>80~100

≤40

>40~63

>63~100

Temp

Min.

Not less than

Not less than

S235JR

235

225

215

215

215

360-510

24

23

22

20

27

S235J0

0

S235J2

-20

S275JR

275

265

255

245

235

410-560

21

20

19

20

27

S275J0

0

S275J2

-20

S355JR

355

345

335

325

315

470-630

20

19

18

20

27

S355J0

0

S355J2

-20

S355K2

-20

40

S355NL

355

345

335

325

315

470-630

22

22

21

-50

27

S355ML

355

345

335

325

325

470-630

22

22

22

-50

27

American standard:

 

Steel grade

Thickness

Yield strength
(MPa)

Tensile Strength
 (MPa)

Elongation %
50mm scale distance

V type impact
(J)

1800bending test

A709-50T-2Z

≤100

≥345

≥450

50mm scale distance

≥21

4

widthways

≥34

δ≤25mmr=1δ

25δ≤50mmr=1.5δ

A709-50T-3Z

-12

A709-50F-2Z

A709-50-2 Z

345-500

4

A709-50F-3Z

A709-50-3 Z

-12

A709 Gr50FZ

A709 Gr50 Z

≤80

≥345

≥450

50mm scale distance

≥21

-20

lengthways

≥34

A709-Gr50 Z

≥54

A709Gr50FN Z

≤80

345-450

≥450

Proportional scale

≥21

-20

lengthways

≥48

A709Gr50N Z

A709-50F-2NZ

l  Application achievements

 

Project name

Steel grade

Qty. (ton)

Thickness (mm)

Shenzhen-Hongkong Bridge

Q345qC, Q370qD

8000

10~40

Shanghai Songhu Bridge

Q345qC, Q345qD

4000

10~40

Hangzhou Bay Sea-Crossing Bridge

Q345qC, Q345qD

5000

10~40

WUXI SANHE HEAVY MACHINERY CO. LTD

Q345qD

4000

10~40

Taizhou railway bridge

Q345qD

3000

10~40

Zhoushan Bridge

Q345C, Q345D

80000

10~40

Incheon Bridge, Korea

SM490YA, SM520B

7000

10~40

Shanghai Chongmingdao Island bridge

Q345C

2000

10~40

American San Francsco-Oakland Bay Bridge

A709-345T2, A709-345F2

5000

10~30

Shanghai Zhenhua Port Machinery suspension bridge

A709-50T, A709-50F-2

200000

10~30

Shanghai outer ring road viaduct

Q345qD

3000

10~40

Shanghai subway extension line

Q345qD

1000

10~40

Dongzhaoxi Bridge, Huzhou, Zhejiang

Q345qD , Q370qD

2862

10~40

Yongjiang Bridge in North ring road, Ninbo

Q345qD , Q370qD

9500

10~50

Reconstruction project of east Desheng road, Hangzhou

Q345qD , Q370qD

7100

10~50

Gaojia bridge project of Pudong, Shanghai

Q345qD , Q370qD

3010

10~50

Parrot Cay Bridge of Wuhan

Q345qD , Q370qD

670

10~50

Trolley car 1# line project of High technology development zone in Suzhou

Q345qD , Q370qD

2500

10~40

Jiading-Minhang viaduct, Shanghai

Q345qD , Q370qD

1400

10~40

Footbridge in Jiangshan Avenue of Nanjing Youth Olympic Games

Q345D, Q345DZ25

9000

8~60

6thJianghan bridge of Wuhan

Q345C

2000

8~60