... structural steel Q235B and High Frequency Welded Light Gauge H sections 2. Size:70*50-500*250 High frequency welded light gauge H ... Sections for contruction 1.standardGB/T 1591, GB/T700, ASTM, EN, DIN2. Steel gradeST37, A36 ... transportation machinery, the ships, the industrial furnace, container frame and warehouse shelves.8.delivery5-10 daysSpecification l mmkg/mmmkg ...