NBK Bright Annealing Steel Tube / Pneumatic Caparo Seamless Precision Steel Pipe
NBK Bright Annealing Steel Tube Hydraulic and Pneumatic Caparo Precision Tubes
Seamless precision steel pipe EN10305-4
Size: 6-350mm
Steel grade: E235,E355 etc
1. Standard:
EN10305-4 Cold drawn tubes for hydraulic and pneumatic power systems
2. Steel Grade:
E215,E235,E275,E355, other materials upon agreement with customers.
Steel Grade and Chemical Compositions:
| Steel Grade | C | Si | Mn | P | S | Al | |
| Steel Name | Steel Number | max | max | max | max | max | min |
| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 | - |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 | - |
3. Production method:
Cold drawing on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance,
with certain heat treatment to achieve better mechanical properties for bending and pressure purposes
4.Size range:
O.D.:5-80mm W.T.:1-15mm L:max12000mm
5. Packing:
In Hexagonal Bundles, with anti-rust oil protection, with seaworthy packing
6.Deliver condition:
| Mechanical properties at room temperature | |||||||
| Steel Grade | Yield Strength ReH min Mpa | Tensile Strength Rm min Mpa | Elongation A min % | ||||
| Steel Name | Steel Nubmer | ||||||
| E215 | 1.0212 | 215 | 290-430 | 30 | |||
| E235 | 1.0308 | 235 | 340-480 | 25 | |||
| E355 | 1.0580 | 355 | 490-630 | 22 | |||
Surface smoothness could be reached by EN10305-4 request Ra≤2μm, and better than standard.
Surface treatment could be:
1. Protection by phosphatization
2. Protection by galvanization, and chromatization type blue-white
3. Protection by galvanization and chromatization type yellow
4. Protection by galvanization and chromatization type olive green
Normative references:
EN10002-1, Metallic materials- Tensile testing- Part 1: Method of test at ambient temperature
EN10020, Definition and classification of grades of steel
EN10021, General technical delivery requirements for steel and iron products.
EN10027-1, Designation systems for steel - Part 1: Steel names, principal symbols.
EN10027-2, Designation systems for stee l- Part 2: Numerical system
EN10052, Vocabulary of heat treatment terms for ferrous products
EN10204, Metallic Products - Types of inspection documents
EN10233, Metallic materials - Tube - Flattening test
EN10234, Metallic materials - Tube - Drift expanding test
EN10246-1, Non-Destructive testing of steel tubes - Part 1: Automatic electromagnetic testing of seamless and welded(except submerged arc-welded) ferromagnetic steel tubes for verification of hydraulic leak-tightness
EN10256, Non-Destructive testing of steel tubes - Qualification and competence of level 1 and 2 non-destructive testing personnel
EN ISO377, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing ( ISO 377:1997)
EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels ( ISO2566-1:1984)
ENV10220, Seamless and welded steel tubes - Dimension and masses per unit length.
EN10266, Steel Tubes, fittings and structural hollow sections - Definition and Symbols for use in products standards
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.