Under DIN EN10025-2 standard Number:1.0045 S355JR steel plate/sheet is used to manufacture the plants of factory ,the commonconstructure and construction machinery and equipment; for example:Drilling machine ,Excavator,Tip lorry, Grab,Conweigh belt,Bulldozer ,all kinds of Chain Block, and other machiney equipments.Seamless Steel Pipe by Threewaysteel Co., Ltd.. Supplier Round Square Pipeline Seamless Carbon Steel Pipe Wall thickness 0.8mm-32mm Product Description :1. Material Grade:Q195, Q215, Q235B, Q345B, S235JR / S235 / S355JR / S355, SS440/SM400A/SM400B 2. Size:21mm - 600mm 3. Wall thickness:0.8mm-32mm 4.