Bridge
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Release Date:2021-12-27

By adopting the process including high quality hot iron+ scrap melting, LF+RH refining, precise chemical composition controlling, serous control and nature transforming of inclusion, bridge steel made by TISCO INDUSTRIAL CO.,LIMITED has stable and excellent comprehensive properties, such as high strength, high toughness, low yield strength ratio, high lamellar tearing resistance and easy welding, capable of meeting the quality requirement of large highway and railway bridges.

  Typical Steel Grades/Specifications

Steel/GradesSpecificationsSize RangeDelivery condition
Q235qC/D/EQ345qC/D/EQ370qC/D/EQ420qC/D/EGB/T714 OR Technical Agreement5~12AR/NR/N/TMCP
>12~100CR/NR/N/TMCP
>100~150CR/NR/N
>150~250N
Q460qC/D/E5~12AR/NR/N/TMCP/QT
>12~100CR/NR/N/TMCP/QT
>100~150N/QT
Q500q/D/EQ550q/D/E5~70TMCP/TMCP+T/QT
>70~150TMCP+T/QT
A709 Gr36(250)A709 Gr50(250)ASTM A709/A709M or Technical Agreement5~12AR/NR/N/TMCP
>12~100CR/NR/N/TMCP
>100~150N
A709 Gr50W(345W)A709 HPS Gr50W(345W)5~100AR/NR/TMCP/QT
A709 HPS Gr70W(485W)5~100TMCP/TMCP+T/QT
A709 HPS Gr70W(690W)5~100QT
S235J0/JR/J2/N/NL/M/MLS275J0/JR/J2/N/NL/M/MLS355J0/JR/J2/K2/N/NL/M/MLS450J0S420/N/NL/M/MLS460/N/NL/M/MLS500Q/QL/QL1S690Q/QL/QL1EN10025 or Technical Agreement5~12AR/NR/N/TMCP
>12~100CR/NR/N/TMCP
>100~150CR/NR/N
>150~250N

  Chemical Composition (wt%)

Grades/GradeCSiMnPSNb、V、Ti
Q345q≤0.180.15-0.40≤1.7≤0.015≤00.005Nb+V+Ti≤0.12
Q370q≤0.180.15-0.40≤1.7≤0.012≤00.005Nb+V+Ti≤0.12
Q420q≤0.180.15-0.40≤1.7≤0.012≤00.005Nb+V+Ti≤0.12
Q460q≤0.180.15-0.40≤1.7≤0.012≤00.005Nb+V+Ti≤0.12
Q500q≤0.090.15-0.40≤1.7≤0.010≤00.005Nb+V+Ti≤0.12
A709 Gr.50≤0.180.15-0.40≤1.6≤0.015≤00.005Nb+V+Ti≤0.12
A709 HPS 70W≤0.110.15-0.40≤1.5≤0.012≤00.005Nb+V+Ti≤0.12

  Mechanical Properties

GradesSize (mm)Rel (Mpa)Rm (Mpa)A%-40℃ KV2 ( J)
Q370qE1042056528169
6041657032296
Q420qE1048564031202
6047062032310
Q460qE4052667229265
10049663028212
Q500qE2057069526320
6455568025310