TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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BS6323-3 HFS3 HFS4 HFS5 HFS8 Hot Finish Seamless/Rolling Steel Tubes, Automotive Tubes
Standard: BS6323-3 Seamless and Welded steel tubes for automobile, mechanical and general engineering purposes
Part 3: Specific requirements for hot finished seamless steel tubes
Applications: for Auto industry / for machinery use/mechanical and general engineering purposes
Size range: O.D.:6-280mm W.T.:1-30mm L:max12000mm
Method of manufacture:
The tubes are manufactured by a seamless process.
Delivery condition:
The tubes are supplied in the hot finished condition
Note: At the option of the manufacturer a normalizing or other heat treatment may be carried out.
| Design | Chemical Compositions( ladle analysis) | Mechanical properties | ||||||
| C | Si | Mn | P | S | Re | Rm | A | |
| max. | max. | max. | ||||||
|
| % | % | % | % | % | N/mm2 | N/mm2 | % |
| HFS 3 | 0.20max. | 0.35 | 0.90max. | 0.050 | 0.050 | 215 | 360 | 24 |
| HFS 4 | 0.25max. | 0.35 | 1.20max. | 0.050 | 0.050 | 235 | 410 | 22 |
| HFS5ab | 0.23max. | 0.50 | 1.50max. | 0.050 | 0.050 | 340 | 490 | 20 |
| HFS 8 | 0.40 to 0.55 | 0.35 | 0.50 to0.90 | 0.050 | 0.050 | 340 | 540 | 18 |
NOTE:Except for grade 8,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 Standards for welding,e.g. BS 5135.
Welding of grade 8 may require special techniques aGrain refining elements may be added to this grade at the option of the manufacturer.
For thicknesses in excess of 30 mm it is permissible for the minimum yield strength to be reduce by 5 N/mm2"
| Outside diameter | Thicknesses | |||||||
| Minimum thickness | Thicknesses in common usage | maximum thickness | ||||||
| mm | mm | mm | mm | mm | mm | mm | mm | mm |
| 33.7 | 3.2 | 3.2 | 4.0 | 5.0 |
|
|
| 6.3 |
| 38.0 | 3.2 | 3.2 | 4.0 | 5.0 | 5.6 |
|
| 6.3 |
| 42.4 | 3.2 | 3.2 | 4.0 | 5.6 |
|
|
| 7.1 |
| 48.3 | 3.2 | 3.2 | 4.0 | 5.0 | 5.6 |
|
| 7.1 |
| 60.3 | 3.2 | 4.5 | 5.0 | 5.6 | 6.3 |
|
| 11 |
| 76.1 | 3.2 | 4.5 | 5.6 | 6.3 |
|
|
| 12.5 |
| 88.9 | 4.0 | 4.5 | 5.0 | 5.6 | 6.3 |
|
| 16 |
| 101.6 | 4.5 | 5.0 | 5.6 | 6.3 |
|
|
| 16 |
| 114.3 | 4.5 | 5.0 | 5.6 | 6.3 | 8.0 |
|
| 28 |
| 127.0 | 4.5 | 5.0 | 5.6 | 6.3 | 8.0 |
|
| 28 |
| 139.7 | 4.5 | 5.0 | 5.6 | 6.3 | 8.0 | 10.0 |
| 32 |
| 168.3 | 5.0 | 5.0 | 5.6 | 6.3 | 7.1 | 8.0 | 10.0 | 40 |
| 193.7 | 5.0 | 5.6 | 6.3 | 8.0 | 10.0 | 12.5 |
| 45 |
| 219.1 | 5.0 | 5.6 | 6.3 | 8.0 | 10.0 | 12.5 |
| 55 |
| 244.5 | 6.3 | 6.3 | 7.1 | 8.0 | 10.0 | 12.5 |
| 60 |
| 273 | 6.3 | 6.3 | 7.1 | 8.0 | 10.0 | 12.5 |
| 70 |
| 323.9 | 6.3 | 6.3 | 7.1 | 8.0 | 10.0 | 12.5 |
| 80 |
| 355.6 | 8.0 | 8.0 | 10.0 | 12.5 |
|
|
| 90 |
| 406.4 | 8.0 | 10.0 | 12.5 |
|
|
|
| 100 |
| 457 | 9.5 | 10.0 | 12.5 |
|
|
|
| 100 |
NOTE Outside diameters and thicknesses other than those listed 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.
Publications referred to:
BS3601, Steel pipes and tubes for pressure purposes: carbon steel with specifed 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 structrual 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