Atmospheric Corrosion Resistant Steel

Chinese standards

GB/T 4171

Q235NHA/B/C/D/E、Q295（G）NHA/B/C/D/E、Q355（G

NHA/B/C/D/E

Atmospheric corrosion resisting

structural steel

GB/T

28907

Q315NS、Q345NS

Sulfuric acid dew-point corrosion

resistant steel plates and strips

Foreign

standards

JIS G3125

SPA-H

Superior atmospheric corrosion resisting

rolled plates

Q235NHA/B/C/D/E

0.13

0.10～0.40

0.20～0.60

0.030

0.030

Moderate

Q295GNHA/B/C/D/E

0.15

0.10～0.50

0.30～1.00

0.030

0.030

Moderate

Q355GNHA/B/C/D/E

0.16

0.50

0.50～1.50

0.030

0.030

Moderate

Q295GNHA/B/C/D/E

0.12

0.10～0.40

0.20～0.50

0.07～0.12

0.020

Moderate

Q355GNHA/B/C/D/E

0.12

0.25～0.75

1.00

0.07～0.15

0.020

Moderate

Q315NS

0.15

0.55

1.50

0.035

0.035

Moderate

Q345NS

0.15

0.55

1.50

0.035

0.0305

Moderate

Temp, ℃

J

Q235NHA/B/C/D/E

≥235

360～510

25

- 20

0

-20

-40

-

≥47

≥34

≥34

≥27

OK

Q295（G）NHA/B/C/D/E

≥295

430～560

24

OK

Q355（G）NHA/B/C/D/E

≥355

490～630

22

OK

Q315NS

≥315

≥440

≥22

-

-

OK

Q345NS

≥345

≥470

≥20

-

-

OK

Temp, ℃

J

Q235NHE

≥270

≥390

≥32

-40

≥120

OK

Q295(G)NHE

≥310

≥490

≥30

-40

≥120

OK

Q355(G)NHE

≥380

≥550

≥26

-40

≥160

OK

Q315NS

≥350

≥475

≥25

-

-

OK

Q345NS

≥375

≥50

≥24

-

-

OK