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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BS6323-8 Seamless and Welded steel tubes for automobile,mechanical and general engineering purposesPart
8: Specific requirements for longitudinally welded stainless steel tubes
Dimension: O.D.:6-280mm W.T.:1-30mm L:max12000mm
Applications: for Auto industry / for machinery use/mechanical and general engineering purposes/construction/pumps technology
Note: Special steel grade is also available, according to customer request
Steel Grade and Chemical Compositions:
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 |
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| 185 | 480 | 30 |
LW 21 | 304S15 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
LWCF 21 |
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| 210 | 510 | 30 |
LW 22 | 316S13 | 420 | 520 | 25 | 185 | 480 | 30 | _ | _ | _ |
LWCF 22 |
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| 185 | 480 | 30 |
LW 23 | 316S33 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
LWCF 23 |
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| 210 | 510 | 30 |
LW 24 | 321S31 | 450 | 560 | 25 | 210 | 510 | 30 | _ | _ | _ |
LWCF 24 |
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| 210 | 510 | 30 |
Tolerance on specified cut lengths | |||
Specified cut length | Tolerance | ||
over | up to and including | ||
mm | mm | mm | |
| 500 | + | 2 |
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| - | 0 |
500 | 2000 | + | 3 |
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| - | 0 |
2000 | 5000 | + | 5 |
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| - | 0 |
5000 | 7000 | + | 10 |
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| - | 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 |
