Precision Seamless Steel Tube-DIN 2391,AS1450 - Seamless Pipe - Product Catalog

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Precision Seamless Steel Tube-DIN 2391,AS1450

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Product Description

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
55	【0.25
60	【0.25
65	【0.30
70	【0.30
75	【0.35
80	【0.35
85	【0.40
90	【0.40
95	【0.45
100	【0.45
110	【0.50
120	【0.50
130	【0.70
140	【0.70
150	【0.80
160	【0.80
170	【0.90
180	【0.90
190	【1.0
200	【1.0
220	【1.20
240	【1.20
260	【1.30
1) For outside diameters of nominal dimensions 4 and 5 mm, the permissible deviation from the nominal dimension s of the wall thickness is 【 20 % For outside diameters of nominal dimensions 6 to 8 mm, the permissible deviation from the nominal dimension s of the wall thickness is 【15%.													s/D =1/60			s/D =1/40					s/D =1/20

Specifications︰

DIN 2391 ST 35, ST 45, ST 52 in BK and BK+S
ASTM A519 1020, 1020,1045
JIS G3473 STC J70
GB8713-88 10#,20#,35#,45#
EN 10305-4, DIN 1630,DIN 2445

The products are used for control rod, shock absorber, transmission shaft, steering axle, front and rear axle, stabilizer rod, muffler and replacement parts for varieties of middle and high class carsand business cars.

The products can be ordered according to customers' design requirements. Main steel gardes:1035, 1045,16Mn, 20Cr, 40Cr, CK35, CK45, SAE1035, SAE1045, St37, St45, St52, etc.

These tubes are manufactured according to DIN 2391 and EN 10305-1. All aspects such as mechanical properties and dimension tolerances highly conform to the requirements of diesel engine tube. In view of oil tube's special quality requirements, we use high quality raw material St34.2, St35, St37,St37.4, St45, St52 from No.5 Steel Group worldwide Baosteel which is better in mechanical properties regarding elongation rate, tensile strength, especially high pressure resistance.
DIN Cold Drawing and BA Seamless Tube with High Precision
　　Synopsis of Process Routing: quality carbon steel → cold drawing → bright heat treatment without oxidization (NBK status) → nondestructive testing. In the wall honing and inside flushing under the high pressure→. Antirust oiling outside surface→plastic capping on both ends
　　Main Features: high accuracy, excellent brightness, no oxidization on the outer and inner walls after heat treatment, high cleanness inside wall. The steel tube is able to stand high pressure. No deformation after cold bending, no crack after flaring and flattening . The complicated geometrical forming and machining can be realized. Color of tube: gray with white.
　　Main Application: to be used in hydraulic system, automobile and in the occasion where the high precision, brightness, cleanness and mechanical properties of the tube are required.

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