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 |
| Length | Max length 12M |
| Type | Seamless |
| OD. Range | 6mm – 114.3mm |
| Standard | DIN2393 |
| Grade | ST34.2, ST37 |
| Wall thickness | 1mm-15mm |
| Brand Name | Joyruns |
| Model Number | DIN2393 Gas Spring tube |
| 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 |
| Length | Max length 12M | Type | Seamless |
| OD. Range | 6mm – 114.3mm | Standard | DIN2393 |
| Grade | ST34.2, ST37 | Wall thickness | 1mm-15mm |
| Brand Name | Joyruns | Model Number | DIN2393 Gas Spring tube |
| Certification | ISO9000 | Place of Origin | CHANGZHOU, CHINA |
| High Light | DIN2393 Seamless Precision Steel Tube ，DIN2393 stainless steel precision tube ，Heat Exchanger precision metal tubing | ||
DIN2393 ST34.2 Welded Precision Steel Tube for Gas Spring
DIN 2393 Standard applies to welded precision steel tubes; and in compliance with ISO/DIS 3304.DIN 2393 Precision Welded Steel Tubes is mainly applied for Auto and motorcycle shock absorbers, Gas springs, Hydraulic system steel tubes, Electric industry, Construction machinery, Heat exchanger and Condenser.
Precision steel tubes
1. Automotive fields
A. Fuel injection lines/nozzles
B. CNG (Compressed Nature Gas) tube-- Burst pressure: 1307Bar, Working Pressure: around 350bar
C. Drive transmission: Steering column elements
D. Gear shafts, hand brake, front axles, airbag inflators, stabilizers, seat fasteners, front-wheel driveshafts
2. Hydraulic Fields
A. Hydraulic circuits (HPL), pneumatic lines, and hydraulic suspension
B. Hydraulic cylinders (HPZ)
Delivery Condition:
| Delivery Condition | Specification |
| BK ( +C ) | Tubes don't undergo heat treatment following the final cold forming,thus have a rather hig-h resistance to deformation |
| BKW ( +LC ) | The final heat treatment is follwed by cold drawing involving limted deformation. Appopriat-e further processing allows a certain degree of cold droming( eg: handing expanding) |
| BKS ( +SR ) | Heat treatment is applied following the last cold forming process, subject to appropriate procession conditions, the increate in the residual stresses,involved enables both forming and maching to a certain degress. |
| GBK ( +A ) | The last cold forming process followed by annealing in controlled atmosphere. |
| NBK (+N ) | The last cold forming process is followed by annealing above the upper transformation poi-nt in a controlled atmosphere. |
DIN2393 ST34.2 Specifications:
Grade and Chemical Composition ( ％ )
| Chemical Composition (%, max) | |||||
| Steel Grade | C | Si | Mn | S | P |
| RSt 34-2 | 0,15 | 0,30 | 0,60 | 0,025 | 0,025 |
| RSt 37-2 | 0,17 | 0,30 | 0,70 | 0,025 | 0,025 |
| St 44-2 | 0,21 | 0,30 | 1,10 | 0,025 | 0,025 |
Mechanical properties
| Steel Grade | Tensile Strength, N/mm2 (min) | Предел текучести, N/mm2 (min) | Elongation, % (min) |
| NBK - normalized | |||
| RSt 34-2 | 340 - 470 | 235 | 25 |
| RSt 37-2 | 440 - 570 | 255 | 21 |
| St 44-2 | 560 - 630 | 355 | 22 |
| BK - without heat treatment | |||
| RSt 34-2 | 480 | - | 6 |
| RSt 37-2 | 580 | - | 5 |
| St 44-2 | 640 | - | 4 |
| GBK - annealed | |||
| RSt 34-2 | 315 | - | 28 |
| RSt 37-2 | 390 | - | 25 |
| St 44-2 | 490 | - | 21 |
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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