Wanjintong Metal

China Steel Manufacturer

Home

Products

Precision Steel Tubes Seamless Steel Pipe Alloy Steel Pipe Hydraulic Steel Tubes Stainless Steel Tubes

News

Steel Knowledge Industry News Internal Information

About Us

English

繁體中文
English

REQUEST A QUOTE

Product
Product Detail

Precision steel pipes for mechanical parts

Precision steel pipes for mechanical parts

Process: Cold drawing and cold rolling, bright annealing
Surface: Smooth and burr free oxide skin
Ra：≤0.8‑3.2μm
Material: Common 20 #, 45 #, 40Cr, Q355B
Specification: Outer diameter 6-180mm, wall thickness 1-18mm customizable

Sales Count Click

Sales Count

Click

Select the number of specifications

OD*WT（mm）

6*2 10*3 18*5 20*5 25*7 28*7 40*10 50*12 70*16 Custom Specs

Please check the product information you want!

Specifications select

Product Detail

Product Overview：

Steel pipes for mechanical parts are one of the commonly used types of seamless steel pipes. Widely used in the manufacturing of mechanical parts and structural components, such as mechanical parts, automotive parts, bicycle frames, rolling bearing rings, jack sleeves, automotive ignition coils, etc. Currently, steel pipes are widely used to manufacture mechanical parts and components. According to the different cross-sectional shapes, it can be divided into circular pipes and irregular pipes. Due to the condition that the circumference is equal, the circular area is the largest, and the cross-section is subjected to internal or external radial pressure with relatively uniform force. Therefore, the vast majority of steel pipes used for mechanical parts are circular pipes.

Product List
Product Name:	10 # Steel pipe for mechanical parts \| Seamless steel pipe
Product Name:	20 # Steel Pipe for Mechanical Parts \| Seamless Steel Pipe
Product Name:	45 # Steel pipe for mechanical parts \| Seamless steel pipe
Product Name:	Q235 steel pipe for mechanical parts \| seamless steel pipe
Product Name:	Q345 steel pipe for mechanical parts \| seamless steel pipe
Product Name:	16Mn steel pipe for mechanical parts \| Seamless steel pipe
Product Name:	40Cr steel pipe for mechanical parts \| seamless steel pipe
Product Name:	27SiMn steel pipe for mechanical parts \| seamless steel pipe
Product Name:	12Cr1MoV steel pipe for mechanical parts \| seamless steel pipe
Product Name:	15CrMo steel pipe for mechanical parts \| Seamless steel pipe
Product Name:	GB3088 Seamless steel pipe for automotive half shaft sleeve pipe
Product Name:	Special steel pipe for industrial accessories \| Seamless steel pipe

Parameter range
Outer diameter	Φ6mm‑Φ219mm， Can undertake customized non-standard outer diameters
Wall thickness	0.5mm‑20mm
Standard length	1‑12m， Customizable short and extended non ruler
Outer diameter accuracy	Maximum ± 0.03mm
Executive Standards	EN 10305-1, ASTM A519, DIN 2391, JIS G3445, GB/T 3639
Non-standard customization	Special wall thickness, honing inner holes, and pressure deep processing can all be customized

Small caliber precision tube Φ 6-25 (sleeve, small shaft sleeve, connecting rod)

Outer diameter (mm)

Common wall thickness

(mm)

1.0，1.5，2.0

1.0，1.5，2.0，2.5

1.0，1.5，2.0，2.5，3.0

1.5，2.0，2.5，3.0，4.0

1.5，2.0，2.5，3.0，4.0，5.0

2.0，2.5，3.0，4.0，5.0

2.0，2.5，3.0，3.5，4.0，5.0

2.0，2.5，3.0，4.0，5.0，6.0

2.0，2.5，3.0，4.0，5.0，6.0，7.0

Medium caliber precision tube Φ 28-60 (flange sleeve, oil cylinder blank, transmission sleeve)
Outer diameter (mm)	28	30	32	35	38	40	42	45	48	50
Common wall thickness (mm)	2.5，3.0，4.0，5.0，6.0，7.0	2.5，3.0，4.0，5.0，6.0，8.0	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10，12	3.0，4.0，5.0，6.0，8.0，10，12	4.0，5.0，6.0，7.0，8.0，10，12

Medium to large diameter precision tube with a diameter of Φ 63-110 (oil cylinder barrel, heavy-duty liner, mechanical cylinder body)

Outer diameter (mm)

100

108

Common wall thickness

(mm)

5，6，8，10，12，14，16

5，6，8，10，12，14，16，20

6，8，10，12，14，16，20

8，10，12，14，16，20，25

Precision honing tube for hydraulic/cylinder barrel (popular machining sizes)
Outer diameter of cylinder blank x wall thickness(mm)	50x7	60x8	63x8	80x10	100x12	120x15
Common inner diameter of finished products(mm)	Φ36	Φ44	Φ47	Φ60	Φ76	Φ90

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/inner diameter tolerance (cold working+C,+LC, most commonly used)
Outer diameter (mm)	4‑30	30‑40	40‑50	50‑60	60‑70	70‑80	80‑100	100‑120	120‑150
Ordinary level deviation (mm)	±0.10	±0.15	±0.20	±0.25	±0.30	±0.35	±0.40	±0.50	±0.75
Advanced precision deviation (mm) (specified in the contract)	±0.05	±0.08	±0.10	±0.12	±0.15	±0.18	±0.20	±0.25	±0.38
The tolerance of the heat treatment state (+SR/+A/+N) will be relaxed, which is approximately+50% -100% higher than the above table. Hydraulic/machined blanks should be selected for+C/+LC delivery as much as possible.

Wall thickness tolerance (mandatory by national standards)
Normal level	Advanced precision (negotiated)
± 10% S or ± 0.10 mm, whichever is larger	± 5% S, minimum ± 0.10mm
Example: Wall thickness 5mm → Normal ± 0.50mm; Wall thickness 1.5mm → Normal ± 0.15mm

Geometric tolerances (ellipticity, straightness)
Ellipticity (non circularity)
Ordinary grade	Advanced
≤ 80% of outer diameter tolerance	≤ 60% of outer diameter tolerance

Straightness (curvature)
Normal	Advanced precision	Honing cylinder
≤ 1.0 mm/m	≤ 0.5 mm/m	≤ 0.3 mm/m

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

Previous : Alloy Seamless Steel Tube Next : Fluid‑service seamless steel tubes

Product Detail

Product Overview：

Product List
Product Name:	10 # Steel pipe for mechanical parts \| Seamless steel pipe
Product Name:	20 # Steel Pipe for Mechanical Parts \| Seamless Steel Pipe
Product Name:	45 # Steel pipe for mechanical parts \| Seamless steel pipe
Product Name:	Q235 steel pipe for mechanical parts \| seamless steel pipe
Product Name:	Q345 steel pipe for mechanical parts \| seamless steel pipe
Product Name:	16Mn steel pipe for mechanical parts \| Seamless steel pipe
Product Name:	40Cr steel pipe for mechanical parts \| seamless steel pipe
Product Name:	27SiMn steel pipe for mechanical parts \| seamless steel pipe
Product Name:	12Cr1MoV steel pipe for mechanical parts \| seamless steel pipe
Product Name:	15CrMo steel pipe for mechanical parts \| Seamless steel pipe
Product Name:	GB3088 Seamless steel pipe for automotive half shaft sleeve pipe
Product Name:	Special steel pipe for industrial accessories \| Seamless steel pipe

Parameter range
Outer diameter	Φ6mm‑Φ219mm， Can undertake customized non-standard outer diameters
Wall thickness	0.5mm‑20mm
Standard length	1‑12m， Customizable short and extended non ruler
Outer diameter accuracy	Maximum ± 0.03mm
Executive Standards	EN 10305-1, ASTM A519, DIN 2391, JIS G3445, GB/T 3639
Non-standard customization	Special wall thickness, honing inner holes, and pressure deep processing can all be customized

Small caliber precision tube Φ 6-25 (sleeve, small shaft sleeve, connecting rod)

Outer diameter (mm)

Common wall thickness

(mm)

1.0，1.5，2.0

1.0，1.5，2.0，2.5

1.0，1.5，2.0，2.5，3.0

1.5，2.0，2.5，3.0，4.0

1.5，2.0，2.5，3.0，4.0，5.0

2.0，2.5，3.0，4.0，5.0

2.0，2.5，3.0，3.5，4.0，5.0

2.0，2.5，3.0，4.0，5.0，6.0

2.0，2.5，3.0，4.0，5.0，6.0，7.0

Medium caliber precision tube Φ 28-60 (flange sleeve, oil cylinder blank, transmission sleeve)
Outer diameter (mm)	28	30	32	35	38	40	42	45	48	50
Common wall thickness (mm)	2.5，3.0，4.0，5.0，6.0，7.0	2.5，3.0，4.0，5.0，6.0，8.0	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10	3.0，4.0，5.0，6.0，8.0，10，12	3.0，4.0，5.0，6.0，8.0，10，12	4.0，5.0，6.0，7.0，8.0，10，12

Medium to large diameter precision tube with a diameter of Φ 63-110 (oil cylinder barrel, heavy-duty liner, mechanical cylinder body)

Outer diameter (mm)

100

108

Common wall thickness

(mm)

5，6，8，10，12，14，16

5，6，8，10，12，14，16，20

6，8，10，12，14，16，20

8，10，12，14，16，20，25

Precision honing tube for hydraulic/cylinder barrel (popular machining sizes)
Outer diameter of cylinder blank x wall thickness(mm)	50x7	60x8	63x8	80x10	100x12	120x15
Common inner diameter of finished products(mm)	Φ36	Φ44	Φ47	Φ60	Φ76	Φ90

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/inner diameter tolerance (cold working+C,+LC, most commonly used)
Outer diameter (mm)	4‑30	30‑40	40‑50	50‑60	60‑70	70‑80	80‑100	100‑120	120‑150
Ordinary level deviation (mm)	±0.10	±0.15	±0.20	±0.25	±0.30	±0.35	±0.40	±0.50	±0.75
Advanced precision deviation (mm) (specified in the contract)	±0.05	±0.08	±0.10	±0.12	±0.15	±0.18	±0.20	±0.25	±0.38
The tolerance of the heat treatment state (+SR/+A/+N) will be relaxed, which is approximately+50% -100% higher than the above table. Hydraulic/machined blanks should be selected for+C/+LC delivery as much as possible.

Wall thickness tolerance (mandatory by national standards)
Normal level	Advanced precision (negotiated)
± 10% S or ± 0.10 mm, whichever is larger	± 5% S, minimum ± 0.10mm
Example: Wall thickness 5mm → Normal ± 0.50mm; Wall thickness 1.5mm → Normal ± 0.15mm

Geometric tolerances (ellipticity, straightness)
Ellipticity (non circularity)
Ordinary grade	Advanced
≤ 80% of outer diameter tolerance	≤ 60% of outer diameter tolerance

Straightness (curvature)
Normal	Advanced precision	Honing cylinder
≤ 1.0 mm/m	≤ 0.5 mm/m	≤ 0.3 mm/m

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