Product Description
Seamless and Welded Steel Tubes for Automobile, mechanical and General Engineering Purposes
Part 8: Specific requirements for longitudinally welded stainless steel tubes
Method of Manufacture:
The tubes are manufactured from flat rolled strip, longitudinally welded across the abutting edges without the addition of filler metal.
Delivery condition:
a) As-welded and sized: KM
b) Welded and sized (fully softened): GKW(S)
c) Welded and sized (fully softened) (including de-scaling): GZF(S)
d) Cold finished(fully softened): GBK
e) Cold finished(fully softened) (including de-scaling): GZF(S)
Steel Grade and Chemical Compositions:
Note: Special steel grade is also available, according to customer request
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Mechanical properties
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|
Designation
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BS 1449-2:
equivalent
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KM (as welded)
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GKM(S),GZF(S)(welded and sized fully softened)
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GBK (S),and GZF(S)(cold finished ,fully softened)
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|
Re min.
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Rm min.
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A min.
|
Re min.
|
Rm min.
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A min.
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Re min.
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Rm min.
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A min.
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N/mm2
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N/mm2
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%
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N/mm2
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N/mm2
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%
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N/mm2
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N/mm2
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%
|
|
LW 12b
|
|
300
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400
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10
|
_
|
_
|
_
|
_
|
_
|
_
|
|
LW 19b
|
409S19
|
300
|
400
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10
|
200
|
350
|
20
|
_
|
_
|
_
|
|
LW 20
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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
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510
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30
|
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Tolerance on specified cut lengths
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Specified cut length
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Tolerance
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|
over
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up to and including
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|
mm
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mm
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mm
|
|
|
500
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+
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2
|
|
|
|
-
|
0
|
|
500
|
2000
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+
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3
|
|
|
|
-
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0
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|
2000
|
5000
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+
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5
|
|
|
|
-
|
0
|
|
5000
|
7000
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+
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10
|
|
|
|
-
|
0
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|
7000
|
__
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by agreement
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NOTE Closer tolerances may be obtained by agreement between the purchaser and manufacturer.
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BS6323 Specifications for
Seamless and welded steel tubes for automobile, mechanical and general engineering purposes
BS6323-1 Part 1: General requirements
BS6323-2 Part 2: Specific requirements for hot finished welded steel tubes
BS6323-3 Part 3: Specific requirements for hot finished seamless steel tubes
BS6323-4 Part 4: Specific requirements for cold finished seamless steel tubes
BS6323-5 Part 5: Specific requirements for electric resistance welded including induction welded steel
tubes
BS6323-6 Part 6: Specific requirements for cold finished electric resistance welded including induction
welded steel tubes
BS6323-7 Part 7: Specific requirements for submerged arc welded steel tubes
BS6323-8 Part 8: Specific requirements for longitudinally welded stainless steel tubes
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