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Thick wall honing steel pipe is a high-precision steel pipe material after cold drawing or hot rolling. Because the inner and outer walls of precision steel pipes have no oxide layer, no leakage under high pressure, high precision, high finish, no deformation during cold bending, flaring, flattening and no cracks, etc., they are mainly used to produce products of pneumatic or hydraulic components, such as cylinders or oil cylinders, which can be seamless pipes. The chemical composition of honing steel pipe includes carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P and chromium Cr.
Rolling processing is a kind of chip-free processing. At normal temperature, the plastic deformation of metal is used to flatten the micro unevenness of the workpiece surface to achieve the purpose of changing the surface structure, mechanical properties, shape and size. Therefore, this method can achieve both finishing and strengthening purposes at the same time, which is impossible for grinding.
No matter what kind of processing method is used, there will always be tiny and uneven tool marks on the surface of the part, and there will be staggered peaks and valleys,
Rolling processing principle: it is a pressure finishing process, which uses the cold plastic characteristics of the metal at normal temperature to apply a certain pressure on the surface of the workpiece using the rolling tool to make the metal on the surface of the workpiece produce plastic flow and fill it into the original residual low valley, so as to reduce the surface roughness of the workpiece. Due to the plastic deformation of the rolled surface metal, the surface structure is cold hardened and the grain becomes fine, forming a dense fibrous structure, and forming a residual stress layer, which improves the hardness and strength, thus improving the wear resistance, corrosion resistance and compatibility of the workpiece surface. Rolling is a plastic processing method without cutting.
1. Smaller outer diameter.
2. High precision and small batch production
3. The cold-drawn finished product has high precision and good surface quality.
4. The cross area of steel pipe is more complex.
5. The performance of steel pipe is superior and the metal is dense.
Speci -cation | Grade | Chemical Composition [%] | ||||||||||||||
C | Mn | P | S | Si | Cr | Mo | Cu | Ni | V | |||||||
Min | Max. | Min | Max. | Max. | Max. | Min. | Max | Min. | Max | Min. | Max | Max | Max | Max | ||
ASTM A-53 | A | - | 0.25 | - | 0.95 | 0.05 | 0.045 | - | - | - | 0.4 | - | 0.15 | 0.40 for S | 0.4 | 0.08 |
B | - | 0.3 | - | 1.2 | 0.05 | 0.045 | - | - | - | 0.4 | - | 0.15 | 0.40 for S | 0.4 | 0.08 |
Speci -cation | Grade | Mechanical Properties | |||||
Yield Strength | Tensile Strength | % Elongation (G.L. 50 mm WT 8 mm) e (min.) | |||||
Min. | Min. | ||||||
PSI | MPa | PSI | MPa | ||||
ASTM A-53 | A | 30,000 | 205 | 48,000 | 330 | e=625000 A02/U09 | |
B | 35,000 | 240 | 60,000 | 415 |
Standard | API 5CT, 5L; ASTM, BS, JIS, DIN | |||
Steel Grade | API 5L Grade B/ASTM A106B, BS 1387 | |||
O.D. | 1/8"--24" | |||
W.T. | SCH10--XXS | |||
Length | 5m--12m | |||
End protection | plastic caps | |||
Outside Coating | black painting, anti-corrosion oil, galvanized or as per required by customer | |||
Packing | Wrapped in bundles by steel strips | |||
Delivery | by container | |||
Third party inspection | SGS/BV | |||
Certificates | API 5CT-0865, 5L-0593, IS09001:2000 | |||
Production Capacity | Three mills with full production capacity, 400,000tons per year | |||
Delivery time | 20 days | |||
Qualification | independent import and export qualifications | |||
Main market | Asia, India, Middle East, America, Europe |