Longitudinally Welded Stainless Steel Tubes BS6323-8 for machinery industry

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Detailed Product Description

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: equivalent	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	Tolerance
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
Outside diameter
over	Up to and including
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

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stainless steel tubes

Contact Details

Torich International Limited

Contact Person: Mr. Richard

Tel: 86-574-88086983

Fax: 86-574-88086983

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