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Steel Products

Corrosion resistant structural steel

Corrosion resistant structural steel
  • ProductsCorrosion resistant structural steel

Detailed

l   Product overview

With the rapid change of technologies and gradual update of material, the application of corrosion resistant structural steel has continually expanded. Corrosion resistant structural steel has got more and more attention from manufacturing enterprises and has a tendency to replace common structural steel. The development of the structural steel can’t be without anti-corrosion technology. Now the corrosion resistance of structural steel has become one of the major issues in the world. In a sense, anti-corrosion technology of steel is the key to ensure the proper use and durability of structural steel.

l   Steel grade and Size

1. Size, Steel grade and delivery status

 

Weathering resistant steel

Executive standard

Steel Grade

Size mm

Delivery status

Chinese standard

GB4171

Q235NHQ295NHQ355NH

Q355GNH

6-80*1600-3250

ARCRN

European standard

EN10025-5

S355J2WS355K2WS355J0WS355J0WPS355J2WP

6-80*1600-3250

ARCRN

American standard

ASTM A709

A709Gr50W BA709Gr50W(T)(F)

6-80*1600-3250

ARCRN

2. Chemical composition Wt%

 

Steel Grade

C

Mn

Si

P

S

Cr

Ni

Cu

Q235NH

≤0.13

0.20-0.60

0.10-0.40

≤0.03

≤0.03

0.40-0.80

≤0.65

0.25-0.55

S355J0WS355J2WS355K2W Q355NH

≤0.15

0.50-1.50

≤0.50

≤0.03

≤0.03

 0.40-0.80

≤0.65

0.25-0.55

S355J0WPS355J2WPQ355GNH

≤0.12

≤1.00

0.20-0.75

0.07-0.15

≤0.02

0.30-1.25 

≤0.65 

0.25-0.55

3. Property indexes
. Chinese standard:

 

Steel Grade

Thickness mm

Yield strength Mpa

Tensile strength Mpa

Elongation %

180° bend

Q235NH

≤16

≥235

360-510

≥25

d=a

1640

≥225

d=2a

4080

≥215

≥24

Q295NH

≤16

≥295

430-560

≥24

d=2a

1640

≥285

d=3a

4080

≥275

≥23

Q355NH

≤16

≥355

490-630

≥22

d=2a

1640

≥345

d=3a

4080

≥335

≥21

Q355GNH

≤16

≥355

490-630

≥22

d=2a

1640

≥345

d=3a

4080

Note: the 180 ° bend requirement of Q295-355 with the thickness of 6 mm or less is d = a

 

Quality level

V-notch impact test

sample direction

temperature /

Impact energy absorption KV2/J

A

longitudinal

B

20

≥47

C

0

≥34

D

-20

≥34

E

-40

≥27

. European standard:

 

Steel Grades

Thickness

Yield strength ReH,Mpa

Tensile strength Rm,Mpa

Elongation %

V longitudinal impact /J

180°bend

S355J0W

S355J2W

S355K2W

≤16

≥355

470-630

≥20

≥2740

d=2a

1640

≥345

4063

≥335

≥19

63-80

≥325

≥18

S355J0WP

S355J2WP

≤16

≥355

≥20

≥27

1640

≥345

Note: tensile gauge length L0 = 5.65, quality grade J0 do 0impact, quality grade J2 do -20impact, quality grade K2 do -20 impact and the impact value is 40J or more.

. American standard:

 

Steel Grade

Thickness

Yield strength ReL

Tensile strength Rm

A50

V longitudinal impact

180°cold bend

MPa

%

temperature

Impact energy /J

A709Gr50W

≤50

≥345

≥485

≥21

21, 4, -12

≥34

d=3a

50100

≥41

l   Application achievements

 

Projects

Steel Grade

Quantity (ton)

Thickness (mm)

Circulating water pipe of Zhejiang thermal power plant

10CrMoAl

1000

8~24

Circulating water pipe of  Guangdong Shanwei power plant

10CrMoAl

1000

16~24

Guangdong Shanwei power plant, Xinjiang power plant

NNS1-2

1600

16~20

Chimney lining of Anhui Xuancheng power plant

NNS1-2

1200

8~35

Chimney lining of Guangdong pinghai power plant

NNS1-2

1300

10~20

Anhui Tongling power plant

NNS1-2

600

10~20

Shanghai Shidongkou power plant, Shanghai Jinshan petrochemical plant

NNS1-2

500

12~35

Inner Mongolia Jinshan power plant

NNS1-2

1000

10~30

More than 70 sets of exhaust equipment in Middle East, Saudi Arabia and United Arab Emirates

S355J0WPS355J0WS355J2W

5000

6~25

Huaneng Power Plant

10CrMoAl

500

10~26

A power plant in Fujian province

Q295NHB

1000

12~36

l   After-sales service

Continual improvement on technology and quality is our constant pursuit. Providing customers with high quality products is our eternal goal, and offering efficient and convenient technical support and after-sales service is our unchanging promise. the reply will be given within 24 hours and service technicians will be on site within 72 hours upon receiving the quality claims from the customers.

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