Torich International Limited
We focus on Quality First, Quality Traceability, and Quality Stability! We focus on Customer First, People First, and Quality-Oriented!
Add to Cart
BS6323-8 Seamless and Welded steel tubes for automobile,mechanical and general engineering purposesPart
8: Specific requirements for longitudinally welded stainless steel tubes
Size range: O.D.:6-280mm W.T.:1-30mm L:max12000mm
Applications: for Auto industry / for machinery use/mechanical and general engineering purposes
Steel Grade and Chemical Compositions:
Note: Special steel grade is also available, according to customer request
| Mechanical properties | ||||||||||
| Designation | BS 1449-2: | KM (as welded) | GKM(S),GZF(S)(welded and sized fully softened) | GBK (S),and GZF(S)(cold finished ,fully softened) | ||||||
| Re min. | Rm min. | A min. | Re min. | Rm min. | A min. | Re min. | Rm min. | A min. | ||
| N/mm2 | N/mm2 | % | N/mm2 | N/mm2 | % | N/mm2 | N/mm2 | % | ||
| LW 12b |
| 300 | 400 | 10 | _ | _ | _ | _ | _ | _ |
| LW 19b | 409S19 | 300 | 400 | 10 | 200 | 350 | 20 | _ | _ | _ |
| LW 20 | 304S11 | 420 | 520 | 25 | 185 | 480 | 30 | _ | _ | _ |
| LWCF 20 |
|
|
|
|
|
|
| 185 | 480 | 30 |
| LW 21 | 304S15 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
| LWCF 21 |
|
|
|
|
|
|
| 210 | 510 | 30 |
| LW 22 | 316S13 | 420 | 520 | 25 | 185 | 480 | 30 | _ | _ | _ |
| LWCF 22 |
|
|
|
|
|
|
| 185 | 480 | 30 |
| LW 23 | 316S33 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
| LWCF 23 |
|
|
|
|
|
|
| 210 | 510 | 30 |
| LW 24 | 321S31 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
| LWCF 24 |
|
|
|
|
|
|
| 210 | 510 | 30 |
| Tolerance on specified cut lengths | |||
| Specified cut length | Tolerance | ||
| over | up to and including | ||
| mm | mm | mm | |
|
| 500 | + | 2 |
|
|
| - | 0 |
| 500 | 2000 | + | 3 |
|
|
| - | 0 |
| 2000 | 5000 | + | 5 |
|
|
| - | 0 |
| 5000 | 7000 | + | 10 |
|
|
| - | 0 |
| 7000 | __ | by agreement | |
| NOTE Closer tolerances may be obtained by agreement between the purchaser and manufacturer. | |||
Tolerance on diameter of as-welded and sized tube | ||
| Outside diameter | Tolerance | |
| over | Up to and including | |
| mm | mm | mm |
|
| 30 | ±0.15 |
| 30 | 50 | ±0.18 |
| 50 | 70 | ±0.25 |
| 70 | 90 | ±0.35 |
| Tolerance on diameter of fully softened tube | ||
| Diameter to thickness ratioD/a | Tolerance | |
| over | up to and including | |
|
| mm | |
| _ | 40 | 1.5 times value in Table 2 |
| 40 | 60 | Twice the value in Table 2 |
| 60 | _ | 2.5 times value in Table 2 |
