SSID / DOM Cold Drawn Welded Tube Steel For Pneumatic Cylinders

SSID / DOM Cold Drawn Welded Tube Steel For Pneumatic Cylinders

SSID/DOM TUBE

Detailed Product Description

With the aid of a special drawing technique, the cold drawn welded tube with a inside smooth and

compressed surface can directly used for the hydraulic and pneumatic cylinder application ( ready-to-use). The hoing or burnishing is not required. Compared to the seamless tube, the advantage of

the SSID reduce the wall thickness deviation and the material cost.

Specification:

EN10305-2 , DIN 2393, ASTM A513 Type 6
ID tolerance: H9
ID roughness: Ra ≤ 0.80u
Concentricity < 3%
Delivery status: BK or BKS
Honing or Burnishing process can be provided after SR on SSID tubes with H8 tolerance.
The welded tubes were approved by eddy current testing and ultrasonic testing.
Hydraulic cylinders were also approved by eddy current test.
Finished tubes are also tested by UT and ET,
Ultrasonic Test (EN10246-7),Eddy current test(EN 10246-3)

Chemical Composition

Mechanical property

Hydraulic Cylinder Tube

1. Specification
GB/T, DIN2391, EN10305-1

2. Delivery Condition
Stress Relieving Annealed a ( +SR, BKS)
As per the request, + N (NBK) or + C ( BK) is available.

3. Outer Diameter
< 40 mm +/-0.2mm
From 40 to 100 mm +/-0.3mm
>100mm +/-0.5mm

4. Wall Thickness
<100mm OD +/-5%
>100mm +/-7.5%

5. Straightness 0.5/1000mm

6. Inside Honed Dia ISO H8

7. Rourghness Ra 0.2~0.4um

8. Length 5.0-5.8m

9. Fix length tolerance
Length<500 +3mm
500< length <=2000 +5mm
2000<length <5000 +10mm
5000<length<7000 +20mm

10. Stencilling Mark
Mill Logo + Specification + Delivery Condition + Steel Grade + Size + Heat Number

11. Tube Ends
Tube ends shall cut square to the tube axis and be free from excessive burrs.
Both ends protected with Plastic caps.

As the result of stress relieved annealing after the final drawing, residual stresses are reduced, forming within defined limits is made possible, and dimensional changes during/after machining are minimized.

Jiangsu New Heyi Machinery Co., Ltd is specialized in producing precision long small diameter axes and  hydraulic piston rod. The products are widely used in mine machinery industry, textile and printing machinery industry and so on. Hydraulic cylinder piston rods are also supplied as the OEM parts for  many large and medium enterprises, such as Heli Forklift Ltd, Hangzhou Forklift Ltd, Sanyi Heavy Industry Ltd.  We have enjoyed a good reputation with high quality and good after-sale service in recent years.  Also our products are exported to USA, Canada, Southeast Asia, Austria, Australia and Brazil etc.

We have set up the principle of “high quality, good reputation”, carried out a series of rigorous quality 

management system, and have already passed the ISO9001:2008 international quality system. Our inspection 

apparatus and production equipment are advanced and superior, that ensure the product of high quality.

We have complete piston rod manufactured equipment covering all processes. The critical processes of heat 

treatment and chrome plating are finished in our own company, which ensure the quality control of the key 

technical requirements.

Our factory is located in Wuxi which is famous for the peaches. The transportation is very convenient, only 

30 minutes to Wuxi Airport and railway station. About 1 kilometer from the entrance of the expressway access 

to Shanghai. The factory covers an area of about 25000 square meters and has more than 200 employees, 

among which more than 20 are technical engineers.