Specializing in the production of large outer diameter precision rolled steel pipes, these pipes have high precision, small tolerances, and ensure a tolerance of+/-0.05mm. The inner and outer surfaces are smooth, without interlayer, scratches, or sand holes. They are widely used in the processing of motor casings, automotive parts, and cylinders. 

Steel Grade：SAE1010/1020/1030/1045Q355/ST52,27SiMn,20Cr,40Cr,20CrMnTi,30CrMnTi,30CrMo,35CrMo,42CrMo,

GCr15/100Cr6,34Cr4,SCM415,SAE4130 and so on.

Size:

OD:3-230mm  and ID0.5-35mm

Finished Size:

NOTED:

1：Tolerance  ID :+/-0.05to+/-0.1mm，OD:+/-0.05to+/-0.1mm  

2：Straightness: less than 0.3mm/1000mm

3:Condition of Deliverry :BKW，BKS，GBK，NBK，BK

To ensure product quality, we are equipped with an oxygen free annealing furnace to ensure that the internal and external tolerances of the steel pipes remain unchanged and maintain the brightness of the steel pipes. We have one quenching furnace to meet the quenching and tempering needs of customers for steel pipes, and we are equipped with a multi roll straightening machine to ensure the customer's straightness requirements. The company has eddy current and ultrasonic testing equipment to improve product quality.

HANLAN STEEL is one of the leading China Mechanical Tube manufacturers and suppliers, if you want to buy or import best high-quality alloy tube professional company, factory, seller, and exporter, or if you are checking steel brands, please feel free to contact us.