... of seamless steel tubes10#~45#,40Mn2,35Cr,35CrMo500007Hydraulic pillar tube, cylinder sleeve etc.45#,27SiMn20008pipes for high-pressure fertilizer equipment20G,15MnV10009Shipping ... ,35CrMo,40Cr3500010Shipping use of tube320,360,410,4609000 Total 450000 hydraulic stand pipe