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Faq

Which steel materials equivalent to A709 GR 50 ?

Steel materials A709 gr 50 one common grade in ASTM specification for structural steel for bridges.In specification ASTM A709/A709M,there are steel grades a709 gr 36, a709 gr 50,a709 gr50s,a709 gr 50w,a709 gr hps 50w,a709 gr hps 70w,a709 gr hps 100w according to different strength.So what steel materials equivalent to A709 Gr 50 in Chinese specifications ? Comparasion for chemical composition and mechanical properties,Q345qC steel in chinese specifications shall be the best equivalent to A709 Gr 50 steel materials.Q345qC steel also application in bridge buildings and can resist certain atmospheric corrosion when bare and unpainting.

Xinsteel stock 4 feet and 8 feet width bridge steel plates astm a709 gr 50 in our port warehouse which can be shipping on board within 3 days.


Bridge steel grades

A709GR50 vs Q345qC

Chemical composition: Heat Analysis  Max%

Standard

Grade

C

Mn

P

S

Si

Cr

Ni

Cu

N

ASTM A709/A709M

A709Gr50

0.23

1.35

0.040

0.050

0.40

/

/

/

/

GB/T 714

Q345qC

0.18

0.9-1.6

0.030

0.025

0.55

0.30

0.30

0.30

0.008

Mechanical Properties:

Thickness

Yield strength

Tensile strength

Mpa  Min.

Mpa

ASTM A709/A709M

A709Gr50

T≤40

345

450 min.

GB/T 714

Q345qC

T≤50

345

490 min.