Changzhou Joyruns Steel Tube CO.,LTD
| Payment Terms | TT OT 100% LC AT SIGHT |
| Supply Ability | 1000Ton/month |
| Delivery Time | 30DAYS |
| Packaging Details | Exporting package/wooden box package |
| Standard | EN10305-1, DIN2391 |
| Grade | E235, E255, E355 |
| Type | Seamless cold drawing or cold rolled |
| OD. Range | 6mm – 114.3mm |
| Wall thickness | 1mm-15mm |
| Length | Max length 12M |
| Brand Name | Joyruns |
| Model Number | EN10305-1, DIN2391 |
| Certification | ISO9000 |
| Place of Origin | CHANGZHOU, CHINA |
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Product Specification
| Payment Terms | TT OT 100% LC AT SIGHT | Supply Ability | 1000Ton/month |
| Delivery Time | 30DAYS | Packaging Details | Exporting package/wooden box package |
| Standard | EN10305-1, DIN2391 | Grade | E235, E255, E355 |
| Type | Seamless cold drawing or cold rolled | OD. Range | 6mm – 114.3mm |
| Wall thickness | 1mm-15mm | Length | Max length 12M |
| Brand Name | Joyruns | Model Number | EN10305-1, DIN2391 |
| Certification | ISO9000 | Place of Origin | CHANGZHOU, CHINA |
| High Light | E255 Seamless Precision Steel Tube ，E255 Precision Cylinder Tubes ，Precision Cylinder Tubes | ||
EN10305-1 E235/E255/E355 + NBK/N/BK Gas Spring Precision Seamless Steel Tube
| Steel Grade | Chemical Composition | |||||
| Symbol | Material Number | C Max. | Si Max. | Mn Max. | P Max. | S Max. |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 |
| E255 | 1.0408 | 0.21 | 0.35 | 0.40--1.10 | 0.025 | 0.025 |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 |
| Steel Grade | +C | +LC | +SR | |||||
| Name | No. | Rm Mpa | A % | Rm Mpa | A % | Rm Mpa | ReH Mpa | A % |
| E235 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 350 | 16 |
| E255 | 1.0408 | 580 | 5 | 520 | 8 | 520 | 375 | 12 |
| E355 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450 | 10 |
| Steel Grade | +A | +N | ||||
| Name | No. | Rm Mpa | A % | Rm Mpa | ReH Mpa | A % |
| E235 | 1.0308 | 315 | 25 | 340--480 | 235 | 25 |
| E255 | 1.0408 | 390 | 21 | 440--570 | 255 | 21 |
| E355 | 1.0580 | 450 | 22 | 490--630 | 355 | 22 |
Quality Control:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing or Cold Rolling, Online inspection
5. Heat Treatment:+SR, +A, +N
6. Straightening/Cutting to specified length/Finished Measuring Inspection
7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc.
8. Packing and Stocking.
100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.
Customer benefits
High dimensional accuracy for inside and outside diameters
Company Details
Business Type:
Manufacturer,Agent,Exporter,Seller
Year Established:
2000
Total Annual:
10000000-20000000
Employee Number:
150~300
Ecer Certification：
Verified Supplier
Changzhou Joyruns Steel Tube Co., Ltd specializes in the export of steel pipes for 20 years. We have been a leading supplier of high-quality steel pipes of carbon, alloy, nickel material & copper, which is one of the most professional Bundy and stainless steel pipe manufactur... Changzhou Joyruns Steel Tube Co., Ltd specializes in the export of steel pipes for 20 years. We have been a leading supplier of high-quality steel pipes of carbon, alloy, nickel material & copper, which is one of the most professional Bundy and stainless steel pipe manufactur...
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