| Specification: | DIN 2391， EN10305-2 | Certification: | ISO， TUV， PED， DNV |
|---|---|---|---|
| Application: | Auto Parts | Technique: | Cold Drawn/ Cold Rolled |
| Steel Grade: | Carbon Steel | Surface Treatment: | Annealed， NBK |
| Length: | As Your Requirements | Product Name: | Carbon Steel Seamless Tube |
| Color: | Black， Bright Annealed， Polished， Galv. | ||
| High Light: | Din2391 Stainless Steel Seamless Tube， Din2391 Stainless Seamless Tube， L12m Stainless Steel Seamless Tube | ||
Round Cold Drawn Seamless Tube， EN10305-2 E235N ， AUTO APPLICATION
We are one of the biggest manufactures of stainless steel & duplex steel & alloy steel tubes and pipes in China. With development more than 20 years， we have accumulated a great many clients all around the world and TONG CHUANG products also won the great praise among the customers.
DIN 2391 Seamless Precision Steel Tubes Characteristic
- Smaller diameters
- High precision in physical property
- Good surface quality
- Complex Steel Cross Area
- Superior Performance
DIN 2391 Seamless Precision Steel Tubes Mechanical Properties
| Pipe types | Steel grades | Minimum resistance properties | |||||||||||
| +C | +LC | +SR | +A | +N | |||||||||
| Rm [MPa] | A% | Rm [MPa] | A% | Rm [MPa] | Re [MPa] | A% | Rm [MPa] | A% | Rm [MPa] | Re [MPa] | A% | ||
| Precise seamless steel pipes St35， St45， St52 According to DIN 2391 | St 35 | 480 | 6 | 420 | 10 | 420 | 350 | 14 | 315 | 25 | 340- 470 | 235 | 25 |
| St 45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440- 570 | 255 | 21 | |
| St 52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490- 630 | 355 | 22 | |
DIN 2391 Seamless Precision Steel Tubes Chemical Composition
| Grade | Mfg. Process | Chemical composition(%) | ||||||||
| C | Si | Mn | P | S | Ni | Cr | Mo | Others | ||
| St30Si | S | 0.10Max | 0.30Max | 0.55Max | 0.040Max | 0.040Max | – | – | – | – |
| St30A1 | S | 0.10Max | 0.05Max | 0.55Max | 0.040Max | 0.040Max | – | – | – | Al deoxydized |
| St35 | S | 0.17Max | 0.35Max | 0.40Max | 0.050Max | 0.050Max | – | – | – | – |
| St45 | S | 0.21Max | 0.35Max | 0.40Max | 0.050Max | 0.050Max | – | – | – | – |
| St52 | S | 0.22Max | 0.55Max | 1.60Max | 0.050Max | 0.050Max | – | – | – | – |
Specification
| Standards | DIN 2391-1 Cold Drawn Tube |
| DIN 2391-1 Cold Drawn Size | 4 to 219mm W. T.: 0.5 to 20mm |
| DIN 2391-1 Cold Drawn Welded Pipe Size | 5.0 mm – 1219.2 mm |
| DIN 2391-1 Cold Drawn EFW Pipe size | 5.0 mm – 1219.2 mm |
| DIN 2391-1 Cold Drawn Tube Swg & Bwg | 10 Swg.， 12 Swg.， 14 Swg.， 16 Swg.， 18 Swg.， 20 Swg. |
| DIN 2391-1 Cold Drawn Pipe Schedule | SCH5， SCH10， SCH10S， SCH20， SCH30， SCH40， SCH40S， STD， SCH80， XS， SCH60， SCH80， SCH120， SCH140， SCH160， XXS |
| DIN 2391-1 Cold Drawn Seamless Tube Size | 3.35 mm OD To 101.6 mm OD |
| DIN 2391-1 Cold Drawn Welded Tube Size | 6.35 mm OD To 152 mm OD |
| Swg & Bwg | 10 Swg.， 12 Swg.， 14 Swg.， 16 Swg.， 18 Swg.， 20 Swg. |
| DIN 2391-1 Cold Drawn Tube wall thickness | 0.020" –0.220"， (special wall thicknesses available) |
| Length | Single Random， Double Random， Standard & Cut length Pipe & Tube |
| Finish | Polished， AP (Annealed & Pickled)， BA (Bright & Annealed)， MF |
| Form | Round， Hydraulic， ‘U’ bent or Hollow，LSAW， Boiler， Straight Pipe， Clad Pipe， Rectangular， Square Pipe Etc |
| Type | Welded， Seamless， ERW， EFW， Fabricated Pipe， ‘U’ bent or Hollow， Hydraulic， LSAW， Boiler， Straight Tube， Tube Coil， Round， Rectangular， Square Tube etc |
| End | Plain End， Beveled End， Treaded Pipe & Tube |
| Application | Oil Pipe & Tube， Gas Pipe & Tube， Fluid Pipe & Tube， Boiler Pipe & Tube， Heat exchanger Tube |
| Value Added Service | Draw & Expansion as per required Size & Length， Polish (Electro & Commercial) Annealed & Pickled Bending， Machining Etc. |
Application
- Machinery use
- Auto shock reducer inner cylinder
- Oil cylinder tube
- Motorcycle shock reducer steel tubes
DIN 2391 Stainless Steel Seamless Tube Application Industries
- Off-Shore Oil Drilling Companies
- Power Generation
- Petrochemicals
- Gas Processing
- Specialty Chemicals
- Pharmaceuticals
- Pharmaceutical Equipment
- Chemical Equipment
- Sea Water Equipment
- Heat Exchangers
- Condensers
- Pulp and Paper Industry
DIN 2391 Stainless Steel Seamless Tube Test Certificates
- EN 10204/3.1B，
- Raw Materials Certificate
- 100% Radiography Test Report
- Third Party Inspection Report， etc
Material Testing:
- Mechanical Testing Such as Tensile of Area
- Hardness Test
- Chemical Analysis – Spectro Analysis
- Positive Material Identification – PMI Testing
- Flattening Test
- Micro and MacroTest
- Pitting Resistance Test
- Flaring Test
- Intergranular Corrosion (IGC) Test
