Special steel of steel round bar Specification:AISI4130/25crmo Other steel grade:4140, 4340, 5140, 9840, 34crnimo6, c45n, s355j2g3, or we supply the grade according the customer's requirement. Size:170mm to 700mm. Delivery condtion:hot forged+normalized+rough turned+quenched and tempered. Size tolerance:-0/+2mm, Length:4m and up, or fix length according the customer's required. Ultrasonic test:sep1921 class 3 c/c. Used for the oil field. Delivery time:within 70 days after order. Loose packing,the weight from 2 tons to 13 tons.
