Product Uses and Introduction

This series of products is for bridge steel, and the material selection needs to be determined based on the specific circumstances. Below, we will introduce the thickness range, delivery condition, and applicable standards for each grade that we can provide. We hope this information is helpful. If you have any questions about the products or need a quote, please contact us via email. Because some grades can be categorized into multiple types according to their applications, this may cause some inconvenience in your search, for which we sincerely apologize. We also welcome any suggestions you may have. Thank you very much!

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If conditions permit, we can also provide steel mill customization services, where the thickness, width, and length can all be made to your needs, just like a tailor making clothes for you, implementing personalized orders.

Steel mill customized business email: customize@cehesteel.com

Scope of supply

Implementation Standards Grade Thickness Delivery status
GB/T714 Q345qC/D 5～140 N
5～70 TM
5～80 AR、CR
Q345qE 5～50 N
5～70 TM
>12～80 AR、CR
Q370qC/D/E 5～100 N
5～60 TM
5～80(Q370qEfor
5～60mm)
5-80(Q370qE is 5-60
mm)		 AR、CR
Q420qD/E 6～60 TM、TM+T
Q460qD/E 6～60 TM、TM+T
Q500qD/E 6～60 TM、TM+T
Q345qNHD/E,Q370qNHD/E,Q420qNHD/E 6～60 TM
ASTMA709
/A709M		 A709-36T-1 6～20 CR
A709-50F-2 6～60 TM
A709-50F-3 6～80 N
A709-50T1 6～60 TM
A709-50T2 6～80 AR、CR、TM
A709Gr.50 6～80 N
A709-50W-A-T1/T2/T3/F1/F2/F3 5～80 AR
A709-50W-B-T1/T2/T3/F1/F2/F3 6～80 AR、CR、TM
A709-50W-C-T1/T2/T3/F1/F2/F3 6～80 AR、CR、TM
A709-HPS50W-T1/T2/T3/F1/F2/F3 6～80 AR、CR、TM
A709-HPS70W-T1/T2/T3/F1/F2/F3 10～50 TM
andZ15、Z25、Z35(thickness≥15mm)
And their Z15,Z25 and Z35(thickness≥15mm)

chemical composition

Grade C Si Mn P S Nb
Q345qC ≤0.18 ≤0.55 0.90-1.70 ≤0.030 ≤0.025 0.005-0.060
Q345qD ≤0.18 ≤0.55 0.90-1.70 ≤0.025 ≤0.020 0.005-0.060
Q345qE ≤0.18 ≤0.55 0.90-1.70 ≤0.020 ≤0.010 0.005-0.060
Q370qD ≤0.17 ≤0.50 1.00-1.60 ≤0.020 ≤0.010 ≤0.035
Q370qE ≤0.17 ≤0.50 1.20-1.60 ≤0.020 ≤0.010 0.010-0.035
Q420qE ≤0.18 ≤0.50 1.20-1.60 ≤0.020 ≤0.010 ≤0.035

Mechanical properties

Grade Thickness  Yield strength
Rel/MPa		 Tensile strength
RM/MPa		 Elongation A % Impact test (longitudinal) 180°Cold bending test: d = mandrel diameter, a = specimen thickness 180°
KV2,J
0℃ -20℃ -40℃
Q345qC 2.5-16 ≥345 ≥490 ≥20 ≥120 d=2a
＞16-25.4 d=3a
Q345qD 2.5-16 ≥120 d=2a
＞16-25.4 d=3a
Q345qE 2.5-16 ≥120 d=3a
＞16-25.4 d=3a
Q370qD 6-16 ≥370 ≥510 ≥21 ≥120 d=2a
＞16-25 ≥20 d=3a
Q370qE 6-16 ≥370 ≥510 ≥21 ≥120 d=2a
＞16-25 ≥20 d=2a
Q420qE 6-16 ≥420 ≥540 ≥20 ≥120 d=2a
＞16-25 ≥19 d=3a