Corrosion resistant steel for Steel bridge

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Style       Grade     
 
Standard            Spec (mm)
Coil  
Spec (mm)
Plate
Characteristic
 
 Application Area                                       
corrosion resistant steel for Railway Vehicle A709M 50W
A709M HPS50W
A709M HSP70W
Q345qNH
Q370qNH
Q420qNH
Q460qNH
Q500qNH
Q550qNH
 ASTM A709M
GB/T 714
OR
Technical Agreement
1.5-19mm 6-50mm  The atmospheric corrosion resistance is better than ordinary bridge steel
 
mainly used for Bridge Construction, increased longevity.
 
corrosion resistant steel bridge
Corrosion resistant steel bridge
 
Grade Chemical Component/%
C Si Mn Nb V Ti Cr Ni Cu Mo N ALs
A709M HPS50W
A709M HSP70W
≤0.11 0.30-
0.50
1.10
-
1.35
AL:
0.01
-
0.04
0.04
-
0.08
Mo:
0.02
-
0.08
0.45
-
0.70
0.25
-
0.40
0.25
-
0.40
     
Q345qNH  
 
 
 
≤0.11
 
 
 
 0.15
~
0.50
 
 
 
 
1.10
~
1.50
 
 
 
0.01
~
0.10
 
 
 
0.01
~
0.10
 
 
 
0.003
~
0.030
 
0.40
~
0.70
 
0.30
~
0.40
 
0.25
~
0.50
≤0.10  
 
 
≤0.008
 
 
0.015
~
0.050
Q370qNH ≤0.15
Q420qNH ≤0.20
Q460qNH
Q500qNH 0.45
~
0.70
0.30
~
0.45
0.25
~
0.55
 
≤0.25
Q550qNH
corrosion resistant steel bridge
Corrosion resistant steel bridge
Mechanical Property
Grade Yield Strength/MPa
 
Tensile Strength/MPa
 
Elongation/%
 
A709M  HPS50W
A709M  HSP70W
≥345 ≥485 ≥21
≥485 585-760 ≥19
Q345qNH ≥345 ≥490 ≥20
Q370qNH ≥370 ≥510 ≥20
Q420qNH ≥420 ≥540 ≥19
Q460qNH ≥460 ≥570 ≥18
Q500qNH ≥500 ≥630 ≥18
Q550qNH ≥550 ≥660 ≥16

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