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DIN 2391-81 SEAMLESS PRECISION STEEL TUBES

Name︰	DIN 2391-81 SEAMLESS PRECISION STEEL TUBES
Model No.︰	001
Brand Name︰	Sunny Steel
Country of Origin︰	China

Product Description

DIN 2391-81 SEAMLESS PRECISION STEEL TUBES (DIN2391-81)
1.Field of application

This Standard applies to seamless precision steel tubes; and, in compliance with ISO/DIS 3304, those tube dimensions have een selectied from the range of manufactura le tu e dimensions which are mainly used as design elements

If tubes having the tolerances and are produced according to the technical conditions of deivery as specified in this Standard are to e used as pipelines, then the dimensions specified in DIN 2448 may from time to time be used. These tubes must be ordered according to quality grade C.

Grade	Mfg. Process	Chemical composition
		C	Si	Mn	P	S	Ni	Cr	Mo	Others	a
											b
											c
											d
St30Si	S	0.10Max	0.30Max	÷0.55	0.040Max	0.040Max	-	-	-	-	a
											b
											c
											d
St30A1	S	0.10Max	0.05Max	÷0.55	0.040Max	0.040Max	-	-	-	Al deoxydized	a
											b
											c
											d
St35	S	0.17Max	0.35Max	∶0.40	0.050Max	0.050Max	-	-	-	-	a
											b
											c
											d
St45	S	0.21Max	0.35Max	∶0.40	0.050Max	0.050Max	-	-	-	-	a
											b
											c
											d
St52	S	0.22Max	0.55Max	∶1.60	0.050Max	0.050Max	-	-	-	-	a
											b
											c
											d

a.Cold-finished/hard b.Cold-finished/soft c.Annealed d.Normalized

Grade	Material number	Tensile Test MPa or N/mm²		Remaks(Similar to JIS)	Possibility Temperature
Grade	Material number	Min Yield point	Tensile Strength	Remaks(Similar to JIS)	Possibility Temperature
St30Si	1.0211	-	400Min	(STKM11)
		-	355Min
		-	285Min
		215	295~420
St30Al	1.0212	-	400Min	(STKM11)
		-	355Min
		-	285Min
		215	295~420
St35	1.0308	-	440Min	(STC38)
		-	370Min
		-	315Min
		235	340~470
St45	1.0408	-	540Min	(STKM13)
		-	470Min
		-	390Min
		255	440~570
St52	1.0580	-	590Min	(STKM19)
		-	540Min
		-	490Min
		350	490~630

Welded Steel Tubing and pipe-Corresponding to DIN 2391-1

Wall thickness s	Nominal dimension	0.5	0.8	1	1.2	1.5	1.8	2	2.2	2.5	2.8	3	4.5	5	5.5	6	7	8	9	10	12	14	16	18	20	22	25
Wall thickness s	Permissible deviation
Outside diameter da
Nominal dimension	Permissible deviation
4	+/-0.1
5
6
7
8
9
10
12	【0.08
14
15
16
18
20
22
25
26
28
30
32	【0.15
35
38
40
42	【0.20
45
48
50

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Total 9 items Showing 1 Next

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