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Structural steel for bridges

High strength bridge steel plate
  • OriginChina
  • Delivery Time≥7 days
  • DemandCustomizable
  • MOQ 1 Ton
  • Mob: +8618191906640
  • Email: info@cjmstainlesssteel.com
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Product Description
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Inspection and Packaging

Bridge steel is used to build railway or highway bridges. The products cover GB/ASTM/ EN standards, including weather-resistant steel and bridge clad plate, with delivery conditions of AR/N/TMCP/ TMCP+T and the maximum strength 500MPa。

To help you better understand the quality and performance of our bridge steel products, we have prepared detailed tables outlining their chemical composition and mechanical properties. These specifications are essential for evaluating strength, weldability, and overall suitability for structural and bridge applications.

Steel grade and dimension

Steel gradeDimension (mm)StandardDelivery condition
ThicknesswidthLength
Q345qC~E Q370qC~E6~150 6~120      1050~4050      5000~23000     GB/T 714AR、N、TMCP
Q345qNHD~F Q370qNHD~F Q420qNHD~F6~100 6~100 6~80 AR、TMCP、TMCP+T
Q500qNHD~F6~80TMCP+T、QT
Q420qD~F Q460qD~F Q500qD~F6~90 6~80 6~80 TMCP TMCP+T
Q690qD~F10~50TMCP+T、QT
A709 Gr.36/ Gr.50  A709-50F-2/50T-2 A709 Gr.50WA/WB6~150 6~150 6~100Q/SGZGS 0335.3 ASTM A709 AR、CR、TMCP、N

Chemical Composition

Table 1 Requirements for P、S、B、H composition of various grades

Quality GradeChemical Composition， %
PSBa,bHa
≤
C0.0300.025  0.0005  0.0002
D0.0250.020
E0.0200.010
F0.0150.006
Note:
a. When the supplier can ensure the residual elements B and H in the steel grade, chemical analysis may be omitted.
b. For quenched and tempered steels with intentionally added boron (B), this limitation does not apply; analysis must be conducted and included in the quality certificate.
c. For steel grades Q420 and above, the sulfur (S) content shall not exceed 0.015%.

Table 2 Chemical Composition of Hot Rolled or Normalized Steel

 Steel grade Quality GradeChemical Composition（%）
CSiMnNbaVaTiaAlsa,bCrNiCuN
≤≤
Q345qC D E0.180.550.90~1.600.005~0.0600.010~0.0800.006~0.0300.010~0.0450.300.300.300.0080
Q370q1.00~1.60
Note:
a. For steel grades of type A, aluminum (Al), niobium (Nb), vanadium (V), and titanium (Ti) may be added individually or in combination. When added individually, the content shall meet the specified range in the table. When added in combination, at least one alloying element must meet the lower limit specified in the table, and the total content of Nb + V + Ti shall not exceed 0.22%.
b. When calculating based on total aluminum (Alt) content, the Alt shall be within the range of 0.015% to 0.050%.

Table 3 Chemical Composition of Thermomechanical Rolled Steel

 Grade Quality GradeChemical Composition（%）
CSiMnaNbbVbTibAlsb,cCrNiCuMoN
≤≤
Q345qC D E 0.14   0.550.90~1.60   0.010~0.090   0.010~0.080   0.006~0.030   0.010~0.045 0.80 0.30   0.30  –   0.0080
Q370qD E1.00~1.60
Q420qD E F 0.17 1.00~1.700.500.300.20
Q460q0.25
Q500q0.800.700.30
Note:
a. Upon agreement between the supplier and the purchaser, the manganese (Mn) content may be increased up to a maximum of 2.00%.
b. Aluminum (Al), niobium (Nb), vanadium (V), and titanium (Ti) may be added individually or in combination. When added individually, their contents shall comply with the specified values in the table. When added in combination, at least one alloying element must meet the minimum specified limit, and the total content of Nb + V + Ti shall not exceed 0.22%.
c. When calculated based on total aluminum (Alt) content, the Alt shall range from 0.015% to 0.050%.

Table 4 Chemical composition of quenched and tempered steel

GradeQuality GradeChemical Composition（%）
CSiMnNbaVaTiaAlsa,bCrNiCuMoN
≤
Q500q   D E F0.11    0.55   0.80~1.700.005~0.060   0.010~0.080   0.006~0.030   0.010~0.045≤   0.80≤   0.70 ≤ 0.30≤   0.30   ≤0.0080
Q550q0.12
Q620q0.14 0.005~0.0900.40~0.800.25~1.00  0.15~ 0.550.20~0.50
Q690q0.150.40~1.000.40~1.200.20~0.60
Note:
Boron (B) may be added in the range of 0.005% to 0.030%.
Note:
a. Aluminum (Al), niobium (Nb), vanadium (V), and titanium (Ti) may be added individually or in combination. When added individually, the content shall comply with the specified values in the table. When added in combination, at least one alloying element must meet the minimum specified limit, and the total content of Nb + V + Ti shall not exceed 0.22%.
b. When calculated based on total aluminum (Alt) content, the Alt shall range from 0.015% to 0.050%.

Table 5 Chemical Composition of Atmospheric Corrosion Resistant Steel

GradeQuality GradeChemical Composition a（%）
CSiMnNbVTiCrNiCuMoNAlsb
≤
Q345qNH  D E F   ≤   0.11   0.15~ 0.50   1.10~ 1.50   0.010~ 0.100   0.010~ 0.100   0.006~ 0.030  0.40~ 0.70  0.30~ 0.40  0.25~ 0.500.10   0.0080  0.015~0.050
Q370qNH0.15
Q420qNH 0.20
Q345qNH
Q460qNH
Q500qNH0.45~ 0.700.30~ 0.450.25~ 0.550.25
Q550qNH
Note:
a. Niobium (Nb), vanadium (V), titanium (Ti), and aluminum (Al) may be added individually or in combination. When added in combination, at least one alloying element must meet the minimum specified limit, and the total content of Nb + V + Ti shall not exceed 0.22%.
b. When calculated based on total aluminum (Alt) content, the Alt shall range from 0.020% to 0.055%.

 Ceq

  Delivery Condition  Steel GradeCarbon Equivalent (CEV), %
Thickness，mm
≤ 50> 50 ～ 100> 100 ～ 150
 Hot Rolled or NormalizedQ345q≤ 0.43≤ 0.45 Mutual Agreement
Q370q≤ 0.44≤ 0.46
 Thermomechanical RollingQ345q≤ 0.38≤ 0.40 –
Q370q≤ 0.38≤ 0.40
   Quenched and Tempered (Q&T)Q500q≤ 0.50≤ 0.55  Mutual Agreement
Q550q≤ 0.52≤ 0.57
Q620q≤ 0.55≤ 0.60
Q690q≤ 0.60≤ 0.65
Note:
The calculation formula for carbon equivalent:
Ceq(%) = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15.
The carbon equivalent for weather-resistant steel may be specified by mutual agreement between the supplier and the purchaser, based on the values in this table.

 Pcm

 Steel GradePcm， %Steel GradePcm， %
≤≤
Q345q0.20Q500q0.25
Q370q0.20Q550q0.25
Q420q0.22Q620q0.25
Q460q0.23Q690q0.25
Note:
For all grades of steel, except weather-resistant steel, when the carbon content is less than or equal to 0.12%, the weldability of the steel is evaluated using the weld crack sensitivity factor (Pcm) instead of the carbon equivalent. The formula for Pcm is as follows:
Pcm = C + Si/30 + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V/10 + 5B.

Mechanical Properties

   Steel GradeTensile Test (a, b)Impact Test (c)
Lower Yield Strength (ReL / MPa) Ultimate Tensile Strength (Rm / MPa)Elongation after Fracture (A / %)  Test Temperature (°C) Impact Absorbed Energy (KV2 / J)
Thickness (mm)
≥ 3  ≤ 50> 50  ≤ 100> 100 ≤ 150
≥≥
  Q345qC  345  335  305  490  200  120
D-20
E-40
  Q370qC  370  360  –  510  200  120
D-20
E-40
  Q420qD  420  410  –  540  19-20 120
E-40
F-6047
  Q460qD  460  450  –  570  19-20 120
E-40
F-6047
  Q500qD  500  480  –  630  18-20 120
E-40
F-6047
  Q550qD  550  530  –  660  16-20 120
E-40
F-6047
  Q4620qD  620  580  –  720  15-20 120
E-40
F-6047
  Q690qD  690  650  –  770  14-20  69
E-40
F-60
Note:
a. When the yield point is not clearly defined, the RP0.2 can be measured to replace the lower yield strength.
b. For the tensile test, a transverse specimen shall be used.
c. For the impact test, a longitudinal specimen shall be used.
FAQ

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment

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