Precision seamless steel tube

Positioning: Mechanical structural application
Application: Machining, hydraulic cylinder, automotive components
Core Selling Points: Tight dimensional tolerances, bright surface free of scale, high surface finish
Tolerance: ±0.05 mm; higher precision available upon contract customization
Surface: Bright & scale‑free, Ra0.8 μm
Size Range: OD 4mm‑400mm; notable advantage in thin‑wall tubes

Sales Count 0 Click

Sales Count 0

Click

Select the number of specifications

Grade

GB/T3639‑2021 EN10305‑1 ASTM A519

Please check the product information you want!

Specifications select

Product Detail

Application Scenarios:
Hydraulic cylinder tube blanks, pneumatic cylinder bodies, automotive components, shock absorbers, mechanical bushings, construction machinery parts, machining cut‑off.

Typical Product List
GB/T 3639 (Chinese National Standard)	20#: Most widely‑used grade, good ductility, for hydraulic cylinders and general‑purpose machining parts
	45#: Medium carbon steel, high strength, for bushings and mechanical components
	40Cr: Alloy steel for quenching and tempering treatment, for construction machinery parts
	Q355B (former 16Mn): High‑strength precision seamless tubes
	27SiMn , 12Cr1MoV , 15CrMo ，...
EN 10305‑1 (European Standard):	E235 , E255 , E355 , ...
ASTM A519 (US Standard):	1020 , 1045 , 4140 , 4130 , 30crmo, 35crmo , ...

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

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

Now ready to place an order:

You can view Ordering Matters | Payment Matters, or enter Submit Purchase | Contact Us

No comment

Next : Hydraulic Cylinder Barrel Blank Seamless Steel Tube, Pre‑Honing Tube

Product Detail

Application Scenarios:
Hydraulic cylinder tube blanks, pneumatic cylinder bodies, automotive components, shock absorbers, mechanical bushings, construction machinery parts, machining cut‑off.

Typical Product List
GB/T 3639 (Chinese National Standard)	20#: Most widely‑used grade, good ductility, for hydraulic cylinders and general‑purpose machining parts
	45#: Medium carbon steel, high strength, for bushings and mechanical components
	40Cr: Alloy steel for quenching and tempering treatment, for construction machinery parts
	Q355B (former 16Mn): High‑strength precision seamless tubes
	27SiMn , 12Cr1MoV , 15CrMo ，...
EN 10305‑1 (European Standard):	E235 , E255 , E355 , ...
ASTM A519 (US Standard):	1020 , 1045 , 4140 , 4130 , 30crmo, 35crmo , ...

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

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