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what is q bqb 340 b490nqr corten steel for bridge

Suppling what is Q BQB 340 B490NQR corten steel with B490NQR improved anti corrosion structure steel plates have better corrosion resistance than carbon steel plates in the atmosphere.B480GNQR weathering steel can be used for manufacturing container, railway vehicles,Q/BQB 340 B480GNQR weathering steel plate with rust resistant, make component corrosion extend.corten steel plate.

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