Active Member
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[China]
Address: Daqiao Developing Zone Haiyan,Zhejiang Province,China
Contact name:Richard
Torich International Limited |
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Standard: BS6323-7 Seamless and welded steel tubes for automobile
mechanical and general engineering purposes
Part 7: Specific requirements for submerged arc welded steel tubes
Seamless and welded tube : O.D.: 508-2020mm W.T.:6.3-50mm L:max12000mm
Automobile mechanical tubing applications: for Auto industry / for machinery use/mechanical and general engineering purposes
Big diameter sizes which are made form material SAW 4 SAW 5a manufactured by longitudinally butt welding preformed syeel plate or skelp by an automatic submerged arc welding process.
Delivery condition:Tubes with as welded hot sized and cold sized.
Random length 6-9m or cutting lengths which specificied by customer.
SAW 4 SAW 5a Steel Grade and Chemical Compositions:
| Chemical Compositions and Mechanical properties | ||||||||
Designation | Chemical Compositions( ladle analysis) | Mechanical properties | ||||||
C | Si | Mn | P | S | Re | Rm | A | |
max. | max. | max. | max. | max. | min. | min. | min. | |
| % | % | % | % | % | N/mm2 | N/mm2 | % |
SAW 4 | 0.25 | 0.35 | 1.20 | 0.050 | 0.050 | 235 | 410 | 22 |
SAW 5a | 0.23 | 0.50 | 1.50 | 0.050 | 0.050 | 340 | 490 | 20 |
NOTE Welding of tubes of these grades does not require special techniques but care should be taken and welding should be carried out in accordance with the guidance given in the appropriate British Standard for welding,e.g. BS 5135.aGrain refining elements may be added to this grade at the option of the manufacturer. | ||||||||
Dimensions of submerged arc welded steel tubes | ||||||
Outside diameter | Thicknesses | |||||
Minimum thickness | Thicknesses in common usage | Maximum thickness | ||||
mm | mm | mm | mm | mm | mm | mm |
508 | 6.3 | 8.0 | 10 | 12.5 |
| 20 |
559 | 6.3 | 8.0 | 10 | 12.5 |
| 20 |
610 | 6.3 | 8.0 | 10 | 12.5 | 16 | 32 |
660 | 6.3 | 8.0 | 10 | 12.5 | 16 | 32 |
711 | 7.1 | 8.0 | 10 | 12.5 | 16 | 32 |
762 | 7.1 | 10 | 12.5 | 16 |
| 32 |
813 | 7.1 | 10 | 12.5 | 16 | 20 | 32 |
864 | 7.1 | 10 | 12.5 | 16 | 20 | 32 |
914 | 8.0 | 10 | 12.5 | 16 | 20 | 45 |
1016 | 8.0 | 12.5 | 16 | 20 | 25 | 50 |
1220 | 10 | 12.5 | 16 | 20 | 25 | 50 |
1420 | 12.5 | 12.5 | 16 | 20 | 25 | 50 |
1620 | 12.5 | 16 | 20 | 25 |
| 50 |
1820 | 12.5 | 16 | 20 | 25 |
| 50 |
2020 | 12.5 | 16 | 20 | 25 |
| 50 |
NOTE Other outside diameters and thicknesses are available by agreement between purchaser and manufacturer.For sectional properties including mass per unit length,see appendix B of BS 6323-1:1982 | ||||||
Note: Special steel grade is also available, according to customer request.
