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High Strength Low Alloy Structuralsteels-GB/T1591-2018

High Strength Low Alloy Structuralsteels-GB/T1591-2018
Details:
Hight strength low alloy structural steels Grade：Q355 B/C/D； Q390 B/C/D；Q420 B/C；Q460 C  Smelting method：Steel is smelted in converters or electric furnaces, and ladle refining can be carried out when necessary. Unless the buyer has special requirements and they are specified in the contract, smelting Method One It is generally chosen by the supplier itself.
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Yosun (Tianjin) Piping Engineering Co., Ltd. is one of the most credible manufacturers and suppliers of high strength low alloy structuralsteels-gb/t1591-2018 in China. Please feel free to wholesale customized high strength low alloy structuralsteels-gb/t1591-2018 at competitive price from our factory. If you have any enquiry about quotation, please feel free to email us.

 

々 CEV of steel delivered in hot-rolled condition

 

Steel grade

CEVMIN%

Steel name

Level

≤30

＞30~63

＞63~150

＞150~250

＞250~400

Q355a

B

0.45

0.47

0.47

0.49b

-

C

-

D

0.49c

Q390

B

0.45

0.47

0.48

-

-

C

D

Q420d

B

0.45

0.47

0.48

0.49b

-

C

Q460d

C

0.47

0.49

0.49

-

-

 

 

々 Chemical composition

 

Steel grade

Chemical composition%

Steel name

Level

Ca

Si

Mn

Pc

Sc

Nbd

ve

Tie

Cr

Ni

Cu

Mo

Nf

B

WT/MM

MIN

≤40b

>40

MIN

Q355

B

0 . 24

0 . 55

1 . 60

0 . 035

0 . 035

-

-

-

0 . 30

0 . 30

0 . 40

-

0 . 012

-

C

0 . 20

0 . 22

0 . 030

0 . 030

D

0 . 20

0 . 22

0 . 025

0 . 025

-

Q390

B

0 . 20

0 . 55

1 . 70

0 . 035

0 . 035

0 . 05

0 . 13

0 . 05

0 . 30

0 . 50

0 . 40

0 . 10

0 . 015

-

C

0 . 030

0 . 030

D

0 . 025

0 . 025

Q420 g

B

0 . 20

0 . 55

1 . 70

0 . 035

0 . 035

0 . 05

0 . 13

0 . 05

0 . 30

0 . 80

0 . 40

0 . 20

0 . 015

-

C

0 . 030

0 . 030

Q460 g

C

0 . 20

0 . 55

1 . 80

0 . 030

0 . 030

0 . 05

0 . 13

0 . 05

0 . 30

0 . 80

0 . 40

0 . 20

0 . 015

0 . 004

 

 

々 Chemical composition(AS HOT ROLLED AND NORMALIZED)

 

Steel grade

Chemical composition%

Steel name

Level

C

si

Mn

pa

sa

Nb

V

Tic

Cr

Ni

Cu

M0

N

Alsd MAX

MIN

MIN

MIN

Q355N

B

0 . 20

0 . 50

0. 90 ~

1 . 65

0 . 035

0 . 035

0. 005 ~

0 . 05

0. 01 ~

0 . 12

0. 006 ~

0 . 05

0 . 30

0 . 50

0 . 40

0 . 10

0 . 015

0 . 015

C

0 . 030

0 . 030

D

0 . 030

0 . 025

E

0 . 18

0 . 025

0 . 020

F

0 . 16

0 . 020

0 . 010

Q390N

B

0 . 20

0 . 50

0. 90 ~

1 . 70

0 . 035

0 . 035

0. 01 ~

0 . 05

0. 01 ~

0 . 20

0. 006 ~

0 . 05

0 . 30

0 . 50

0 . 40

0 . 10

0 . 015

0 . 015

C

0 . 030

0 . 030

D

0 . 030

0 . 025

E

0 . 025

0 . 020

Q420N

B

0 . 20

0 . 60

1 . 00 ~

1 . 70

0 . 035

0 . 035

0. 01 ~

0 . 05

0. 01 ~

0 . 20

0. 006 ~

0 . 05

0 . 30

0 . 80

0 . 40

0 . 10

0 . 015

0 . 015

C

0 . 030

0 . 030

D

0 . 030

0 . 025

0 . 025

E

0 . 025

0 . 020

Q460Nb

C

0 . 20

0 . 60

1 . 00 ~

1 . 70

0 . 030

0 . 030

0. 01 ~

0 . 05

0. 01 ~

0 . 20

0. 006 ~

0 . 05

0 . 30

0 . 80

0 . 40

0 . 10

0 . 015

0 . 015

D

0 . 030

0 . 025

0 . 025

E

0 . 025

0 . 020

 

 

々 Yield strengt(TMCP) 

 

Steel grade

Yield strength ReHa /Mpa

MAX

Tensilestrength Rm /MPa

Elongation A/%

MAX

Steel name

Level

WT/mm

≤16

>16 ~

40

>40 ~

63

>63 ~

80

>80 ~

100

>100 ~

120 c

≤40

>40 ~

63

>63 ~

80

>80 ~

100

>100 ~

120b

Q355M

B,C,D,E,F

355

345

335

325

325

320

470 ~

630

450 ~

610

440 ~

600

440 ~

600

430 ~

590

22

Q390M

B,C,D,E

390

380

360

340

340

335

490 ~

650

480 ~

640

470 ~

630

460 ~

620

450 ~

610

20

Q420M

B,C,D,E

420

400

390

380

370

365

520 ~

680

500 ~

660

480 ~

640

470 ~

630

460 ~

620

19

Q460M

C,D,E

460

440

430

410

400

385

540 ~

720

530 ~

710

510 ~

690

500 ~

680

490 ~

660

17

Q500M

C,D,E

500

490

480

460

450

-

610 ~

770

600 ~

760

590 ~

750

540 ~

730

-

17

Q550M

C,D,E

550

540

530

510

500

-

670 ~

830

620 ~

810

600 ~

790

590 ~

780

-

16

Q620M

C,D,E

620

610

600

580

-

-

710 ~

880

690 ~

880

670 ~

860

-

-

15

Q690M

C,D,E

690

680

670

650

-

-

770 ~

940

750 ~

920

730 ~

900

-

-

14

 

 

 

々 Comparison of domestic and international standard grades 

 

ISO/T-1591-2018

GB/T 1591-2008

ISO 630-2:

2011

ISO 630-3:

2012

EN 10025-2:

2004

EN 10025-3:

2004

EN 10025-4:

2004

Q355B(AR)

Q345B(AS HOT ROLLED)

S355B

-

S355JR

-

-

Q355C(AR)

Q345C((AS HOT ROLLED)

S355C

-

S355J0

-

-

Q355D(AR)

Q345D((AS HOT ROLLED)

S355D

-

S355J2

-

-

Q355NB

Q345B(N/(AS HOT ROLLED)

-

-

-

-

-

Q355NC

Q345C(N/(AS HOT ROLLED)

-

-

-

-

-

Q355ND

Q345D(N/(AS HOT ROLLED)

-

S355ND

-

S355N

-

Q355NE

Q345E(N/(AS HOT ROLLED)

-

S355NE

-

S355NL

-

Q355NF

-

-

-

-

-

-

Q355MB

Q345B(TMCP)

-

-

-

-

-

Q355MC

Q345C(TMCP)

-

-

-

-

-

Q355MD

Q345D(TMCP)

-

S355MD

-

-

S355M

Q355ME

Q345E(TMCP)

-

S355ME

-

-

S355ML

Q355MF

-

-

-

-

-

-

Q390B(AR)

Q390B(AS HOT ROLLED)

-

-

-

-

-

Q390C(AR)

Q390C(AS HOT ROLLED)

-

-

-

-

-

Q390D(AR)

Q390D(AS HOT ROLLED)

-

-

-

-

-

Q390NB

Q390B(N/(AS HOT ROLLED)

-

-

-

-

-

Q390NC

Q390C(N/(AS HOT ROLLED)

-

-

-

-

-

Q390ND

Q390D(N/(AS HOT ROLLED)

-

-

-

-

-

Q390NE

Q390E(N/(AS HOT ROLLED)

-

-

-

-

-

Q390MB

Q390B(TMCP)

-

-

-

-

-

Q390MC

Q390C(TMCP)

-

-

-

-

-

Q390MD

Q390D(TMCP)

-

-

-

-

-

Q390ME

Q390E(TMCP)

-

-

-

-

-

Q420B(AR)

Q420B(AS HOT ROLLED)

-

-

-

-

-

Q420C(AR)

Q420C(AS HOT ROLLED)

-

-

-

-

-

Q420NB

Q420B(N/(AS HOT ROLLED)

-

-

-

-

-

Q420NC

Q420C(N/(AS HOT ROLLED)

-

-

-

-

-

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