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Description:Features: 1) Specification: φ50 - 200mm 2) Hot rolling craftwork, hot forging and fine mechanical performance 3) Chemical components meet standards, delivery in black skin 4) Standards: a) JIS: SCr240 (SCr22) b) ASTM: AISI 5120 c) French standard: 18C3 5) Used for manufacturing structural tubes, fluid tubes and medium and low pressure boiler tubes Packing: Packed with iron wires