... tube of the wind power generation,the. Low alloy structural steel plate: The low alloy structural plates make use in making factory building ,general ... S355N,S420M,S460M EN10113-2 High strength structural plate . A514,A710,A709Gr50 ASTM Q500,Q550,Q620,Q690 GB/T 16270 S460Q(L),S500Q(L)~S960Q ...