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[China]
Trade Verify
Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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Verified Suppliers
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Standard: BS6323-7 Seamless and Welded Steel Tubes for Automobile Mchanical and General Engineering Purposes
Part 7: Specific Requirements for Submerged Arc Welded Steel Tubes
Applications: for Auto industry / for machinery use/mechanical and general engineering purposes
Size range: O.D.: 508-2020mm W.T.:6.3-50mm L:max12000mm
Method of Manufacture:
The tubes are manufactured by longitudinally butt welding preformed steel plate or skelp by an automatic submerged arc welding process
Delivery Condition:
The tubes are supplied in the condition of:
a) As-welded
b) Hot sized
c) Cold sized
| 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.a Grain 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.
Tests:
Bend tests (strips)
The diameter of the bar shall be size times the thickness of the test pieces.
The test piece shall be show no significant crack or flaw. The opening out of a slight defect due to incomplete root penetration or lack of root fusion need not be considered a cause for rejection provided the defect has sound metal at the back and on each side of it.
In borderline cases further tests shall be made on test pieces from the same weld adjacent to the original test piece.
Publications referred to:
BS3601, Steel pipes and tubes for pressure purposes: carbon steel with specified room temperature properties
BS 3602, Specifications for steel pipes and tubes for pressure purposes: carbon and carbon manganese steel with specified elevated temperature properties.
BS 3603, Specification for steel pipes and tubes for pressure purposes: carbon and alloy steel with specified low temperature properties
BS3604, Specification for steel pipes and tubes for pressure purposes: ferritic alloy steel with specified elevated temperature properties.
BS3605, Seamless and welded austenitic stainless steel pipes and steel tubes for pressure purposes
BS4360, Specification for weldable structural steels
BS4848, Hot-rolled structural steel sections
BS4848-2, Hollow sections
BS5135, Metal-arc welding of carbon and carbon manganese steels
BS6323, Specification for seamless and welded steel tubes for automobile, mechanical and general engineering purposes
BS6323-1, General requirements
