En10305 A519 E235 E355 100mm 205mm Welded Dom Steel Tubing Hydraulic Cylinder Tube Cylinder Rods

EN10305 ASTM A519 Grade E355 DOM Cold Drawn Welded Tube for Hydraulic Cylinder

ID : 30--250mm
ID Tolerance : H8 H9

Grade: 20# 45# 16Mn 25Mn 27SiMn E355 SAE1026

Standard: GB/T8713 GB/T3639 DIN2391 EN10305 ASTMA519

Range: 30-300mm

Length: 11m(max)

Tolerance on Wall Thickness:

 Diameter: >40 +/-0.2mm

 Diameter: 40 <100 +/-0.3mm

 Diameter >100 +/-0.5mm

Processing : cold drawn   cold rolled   honed   SRB   Burnish

Delivery condition of hydraulic cylinder tube:

1.NBK(+N) of hydraulic tube

after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium

2. GBK(+A) of hydraulic cylinder tube

after cold forming, annealing in non oxidizing medium protective gas

3. BK(+C) of honed tube

the final heat treatment after cold forming, therefore small steel pipe plastically, the plastically degree does not guarantee

4. BKW(+LC) of hydraulic cylinder tube

after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)

5. BKS(+SR) of honed tube

have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again

Torich Strength:

1. Torich is the STEEL TUBE MAKER company in China,playing a significant role in domestic market as well as international market.
2. Our products have exported to over 56 countries worldwide, winning a great fame among our customers.
3. There was no quality claim in the past 3 years.
4. First production was started since 1997, our boss worked in steel tube industry for over 10 years before started the own factory, factory engineers with over 30 years manufacturing experience, knowing well about production and inspection technology.
5. We have been exporting steel tubes since 10 years ago, and know well about international standard for steel tubes DIN/EN,ASTM,SAE,BS,GOST,JIS etc,also with great experience of International trading practices.
6. Our team take Timely action within 24 hours after receiving customers' first requirement and enquiry.
7. 100% prompt delivery in the past 3 years.
8. 100% dimensional check and 100% visual inspection on tube surfaces.
9. 100% eddy current test and ultrasonic test for detecting longitudinal and transversal defects.
10.Convenient tranportation: production location is 30 mins high speed train from Shanghai, 2 hours drive from Shanghai