• Bridge building steel plate
  • Bridge building steel plate
  • Bridge building steel plate
  • Bridge building steel plate
  • Bridge building steel plate

Bridge Building Steel Plate

  • Product: Steel plate for bridge building
  • Materials: 16q,16Mnq,16MnCuq15MnVq,15MnVNq14MnNbp,Q345q,Q420q,A709M(Gr36,50,50W,70W)
  • Standard: YB168 &YB(T)10GB/T714ASTM
  • Thickness: 1.2-400mm
  • Width: 50-4020mm
  • Length: 50-4020mm
■ Full Data
Size Range:
♦ Thickness:1.2-400mm,
♦ Width 50-4020mm,
♦ Length :50-25000mm.

Condition of delivery: According to user requirements, can be Hot rolled, normalizing, tempering, normalizing and tempering, quenching and other delivery. 

Standard: According to user requirements, can be delivered the following criteria: national standards, metallurgical industry standards, the United States ASTM, ASME standards, Japanese JIS, German DIN, British BS, European EN, the international ISO standards and the standards specific board and so on.

Quality grade:A,B,C,D,E and through-thickness direction Z15,Z25,Z35.

UT Standard:China standard(JB4730,GB/T2970)、ASTM(A435、A577、A588)、Japan(JISG0801、JISG0901)、German(SEL072)、British(BS5996)、France(NFS04-305)and so on the inspection test standard at china and abroad.


Product
 
Materials Standard Used
Steel plate for bridge building 16q,16Mnq,16MnCuq
15MnVq,15MnVNq
14MnNbp,Q345q,Q420q
A709M(Gr36,50,50W,70W)
YB168 &
YB(T)10
GB/T714
ASTM
For the production of riveted and bolted and welded structures highway bridge and railway bridges (including the bridge).
■ Features
Item name and application

Item name Brand Brand implication Carried standard Application
Bridge steel plate Q345q Q—stands for yield point 345,370,420-stands for value of yield point q-stands for the first letter in Chinese spelling GB/T714-2000 Used for making riveting and bolted and welded structure in highway bridge and railroad bridge(included in bay bridge).
Q370q
Q420q

Technical requirment
Brand name and melting composition
Brand name and melting composition 

Brand grade C Si Mn P S Alt
Q235q C ≤0.20 ≤0.30 0.40~0.70 ≤0.035 ≤0.035  
Q235q D ≤0.18 ≤0.30 0.50~0.80 ≤0.025 ≤0.025 ≥0.020
Q345q C ≤0.20 ≤0.60 1.00~1.60 ≤0.035 ≤0.035  
Q345q D ≤0.18 ≤0.60 1.10~1.60 ≤0.025 ≤0.025 ≥0.020
Q345q E ≤0.17 ≤0.50 1.20~1.60 ≤0.020 ≤0.015 ≥0.020
Q370q C ≤0.18 ≤0.50 1.20~1.60 ≤0.035 ≤0.035  
Q370q D ≤0.17 ≤0.50 1.20~1.60 ≤0.025 ≤0.025 ≥0.020
Q370q E ≤0.17 ≤0.50 1.20~1.60 ≤0.020 ≤0.015 ≥0.020
Q420q C ≤0.18 ≤0.50 1.20~1.60 ≤0.035 ≤0.035  
Q420q D ≤0.17 ≤0.60 1.30~1.70 ≤0.025 ≤0.025 ≥0.020
Q420q E ≤0.17 ≤0.60 1.30~1.70 ≤0.020 ≤0.015 ≥0.020

♦To improve the quality of steel products, it can put in some trace elements like vanadium, niobium, titanium, nitrogen and so on. The content should meet the requirments in sheet 2, and indicate in certificate of quality. 

V Nb Ti N
≤0.08 ≤0.045 ≤0.02 ≤0.018

♦The cotent of residual elements like chromium, nikel and copper should not more than 0.30%. 2.2.1.4 The carbon equivalent of bridge steel brands should meet the requirment in sheet 3. 

Brand Q345q Q370q Q420q
Ceq 0.43% 0.44% 0.45%
 
   

♦Follow the belowing formula to calculate the carbon equivalent



♦Mechanical property see sheet 4 

Brand Quality grade Thickness mm Yield point MPa Tensile strength MPa · Elongation % V type impact strength longitudinal) V type aging impact strength, J 180°180° Bending test Thickness of steel products mm
T ℃ J
Not less than ≤16 >16
Q235q C ≤16 >16~35 >35~50 >50~100 235 225 215 205 390 380 375 375 26 0 27 - d=1.5a d=2.5a
D -20 27 27
Q345q C ≤16 >16~35 >35~50 >50~100 345 325 315 305 510 490 470 470 21 20 20 20 0 34 - d=2a d=3a
D -20 34 34
E -40 34
Q370q C ≤16 >16~35 >35~50 >50~100 370 355 330 330 530 510 490 490 21 20 20 20 0 41 -
D -20 41 41
E -40 41
Q420q C ≤16 >16~35 >35~50 >50~100 420 410 400 390 570 550 540 530 20 19 19 19 0 47 -
D -20 47 47
E -40  

♦Chemical compostion

Brand grade C≤ Mn P ≤ S ≤ Si NI≤ Cr ≤ Cu ≤ V
A709 50 0.23 0.80-1.35 0.040 0.050 0.15-0.40 - - - 0.01-0.15
A709 50s 0.23 0.50-1.60 0.035 0.045 0.15-0.40 0.045 0.035 0.06 0.01-0.15
A709 50w 0.19 0.80-1.25 0.040 0.040 0.30-0.65 0.40 0.40-0.65 0.25-0.40 0.20-0.10
A709 HPS70W 0.19 0.80-1.25 0.040 0.040 0.30-0.65 0.40 0.40-0.65 0.25-0.40 0.20-0.10
A709 100w 0.20 0.080-1.10 0.055 0.035 0.040-0.80 0.035 0.50–0.80 0.15–0.50 0.03–0.08
♦Mechanical property
Brand Grade Yield point σs,MPa Tensile strength σb MPa Elongation δ5 % Longitudinal impact strength,AkV,J(℃)
Thickness ≤100mm 20 0 -20 -40
Not less than Not less than
A709 50 345 >450 20 21      
A709 50s 345-450 >450 18 21      
A709 50w 345 >485 18 21      
A709 HPS70W 485 585-760 18     23  
A709 100w 620 690-895 18       34

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