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Product Detail

Precision bright tube

Process: Cold Rolling + Bright Annealing
Surface: Smooth Surface, Oxide - Free Finish
Ra: 0.8 - 3.2μm (Customizable)
Material: 20# (AISI 1020), 45# (AISI 1045), Q355B (EN S355JR) — Equivalent International Grades Available
Specification: Specifications: Outer Diameter (OD): 6 - 219mm; Wall Thickness (WT): 1 - 20mm (Customizable per Requirement)

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OD*WT（mm）

10*2.0 12*2.5 14*3.0 16*3.0 18*3.5 20*4.0 22*4.0 25*4.5 28*5.0 Custom Specs

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Product Detail

Product Description：

Precision bright tube is a high-precision steel pipe material processed through precision rolling or cold drawing. Due to its advantages such as no oxide layer on the inner and outer walls, no leakage under high pressure, high precision, high smoothness, no deformation in cold bending, no cracks in expanding or flattening, it is mainly used to produce pneumatic or hydraulic components, such as cylinders or oil cylinders, which can be seamless or welded tubes. The chemical composition of precision bright tube includes carbon (C), silicon (Si), manganese (Mn), sulfur (S), phosphorus (P), and chromium (Cr). It is used in precision seamless tubes for automobiles, motorcycles, construction machinery, jacks, power tools, sports equipment, and other fields.

Product List
Product Name:	10# Precision Bright Tube \| Seamless Steel Tube
Product Name:	20# Precision Bright Tube \| Seamless Steel Tube
Product Name:	45# Precision Bright Tube \| Seamless Steel Tube
Product Name:	Q235 Precision Bright Tube \| Seamless Steel Tube
Product Name:	Q345 Precision Bright Tube \| Seamless Steel Tube
Product Name:	16Mn Precision Bright Tube \| Seamless Steel Tube
Product Name:	40Cr Precision Bright Tube \| Seamless Steel Tube
Product Name:	27SiMn Precision Bright Tube \| Seamless Steel Tube
Product Name:	12Cr1MoV Precision Bright Tube \| Seamless Steel Tube
Product Name:	15CrMo Precision Bright Tube \| Seamless Steel Tube

Parameter range
Outer diameter	6mm-219mm
Wall thickness	0.5mm - 20mm (Note: subject to OD)
Standard length	1m - 12m (Random or Fixed)
Outer diameter accuracy	±0.03mm - ±0.1mm (According to DIN 2391/ASTM)
Executive Standards	GB/T 3639, DIN 2391, ASTM A519, JIS G3445
Non-standard customization	Non-standard sizes & lengths available

Commonly used high-frequency specifications in the market (outer diameter x wall thickness mm)
Outer diameter (mm)	10	12	14	16	18	20	25	28	30
Common wall thickness (mm)	1-2.0	1-2.5	1-3.0	1-3.0	1.5-3.5	1.5-4.0	2-4.5	2-5	2-6

Outer diameter (mm)	32	35	38	42	45	50	57	60	63
Common wall thickness (mm)	2-6	2-7	2-8	2-8	2-10	2-10	3-12	3-12	3-14
Addendum: Precision tubes for oil cylinders Priority should be given to GB/T 8713 (Precision Seamless Steel Pipe for Hydraulic and Pneumatic Applications) for oil cylinder barrels, with a straightness of ≤ 1mm/m and a higher inner diameter tolerance grade of S3/D3.

Optional tolerance range
Tolerance control	Optional manufacturing process
Tolerance ≤ 0.05 mm	Cold rolling
Tolerance ≤ 0.10 mm	Cold rolling
Tolerance ≤ 0.30 mm	Cold drawing \| Cold rolling
Tolerance ≤ 0.50 mm	Cold drawing \| Hot rolling
Tolerance ≤ 1.00 mm	Hot rolling \| Hot expanding

Outer diameter tolerance (cold working state+C/+LC)
Outer diameter (mm)	5-10	10-20	20-30	30-40	40-50	50-60	60-80	80-100	100-120	120-150
Allowable deviation (mm)	±0.08	±0.10	±0.15	±0.20	±0.25	±0.30	±0.35	±0.45	±0.50	±0.75
Heat treatment state (+SR+A+N): The tolerance of the thin-walled tube is increased by 1.5-2 times, and the S/D ratio is observed Wall thickness tolerance: ± 10% S, minimum ± 0.10mm, whichever is greater

Optional delivery status
Oil removal from oil pipes	Annealing and straightening	Steel pipe corrosion prevention
Steel pipe threading	Length cut-to-length	Steel pipe coating
Steel pipe cap	Exquisite bundling	Beveling

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Next : Seamless steel pipe for hydraulic applications

Product Detail

Product Description：

Product List
Product Name:	10# Precision Bright Tube \| Seamless Steel Tube
Product Name:	20# Precision Bright Tube \| Seamless Steel Tube
Product Name:	45# Precision Bright Tube \| Seamless Steel Tube
Product Name:	Q235 Precision Bright Tube \| Seamless Steel Tube
Product Name:	Q345 Precision Bright Tube \| Seamless Steel Tube
Product Name:	16Mn Precision Bright Tube \| Seamless Steel Tube
Product Name:	40Cr Precision Bright Tube \| Seamless Steel Tube
Product Name:	27SiMn Precision Bright Tube \| Seamless Steel Tube
Product Name:	12Cr1MoV Precision Bright Tube \| Seamless Steel Tube
Product Name:	15CrMo Precision Bright Tube \| Seamless Steel Tube

Parameter range
Outer diameter	6mm-219mm
Wall thickness	0.5mm - 20mm (Note: subject to OD)
Standard length	1m - 12m (Random or Fixed)
Outer diameter accuracy	±0.03mm - ±0.1mm (According to DIN 2391/ASTM)
Executive Standards	GB/T 3639, DIN 2391, ASTM A519, JIS G3445
Non-standard customization	Non-standard sizes & lengths available

Commonly used high-frequency specifications in the market (outer diameter x wall thickness mm)
Outer diameter (mm)	10	12	14	16	18	20	25	28	30
Common wall thickness (mm)	1-2.0	1-2.5	1-3.0	1-3.0	1.5-3.5	1.5-4.0	2-4.5	2-5	2-6

Outer diameter (mm)	32	35	38	42	45	50	57	60	63
Common wall thickness (mm)	2-6	2-7	2-8	2-8	2-10	2-10	3-12	3-12	3-14
Addendum: Precision tubes for oil cylinders Priority should be given to GB/T 8713 (Precision Seamless Steel Pipe for Hydraulic and Pneumatic Applications) for oil cylinder barrels, with a straightness of ≤ 1mm/m and a higher inner diameter tolerance grade of S3/D3.

Optional tolerance range
Tolerance control	Optional manufacturing process
Tolerance ≤ 0.05 mm	Cold rolling
Tolerance ≤ 0.10 mm	Cold rolling
Tolerance ≤ 0.30 mm	Cold drawing \| Cold rolling
Tolerance ≤ 0.50 mm	Cold drawing \| Hot rolling
Tolerance ≤ 1.00 mm	Hot rolling \| Hot expanding

Outer diameter tolerance (cold working state+C/+LC)
Outer diameter (mm)	5-10	10-20	20-30	30-40	40-50	50-60	60-80	80-100	100-120	120-150
Allowable deviation (mm)	±0.08	±0.10	±0.15	±0.20	±0.25	±0.30	±0.35	±0.45	±0.50	±0.75
Heat treatment state (+SR+A+N): The tolerance of the thin-walled tube is increased by 1.5-2 times, and the S/D ratio is observed Wall thickness tolerance: ± 10% S, minimum ± 0.10mm, whichever is greater

Optional delivery status
Oil removal from oil pipes	Annealing and straightening	Steel pipe corrosion prevention
Steel pipe threading	Length cut-to-length	Steel pipe coating
Steel pipe cap	Exquisite bundling	Beveling