En10297 E355 1.0580 Mechanical Engineering Seamless Circular Round Alloy Carbon Steel Tube Pipe

• After-sales Service: Technical/Sample/Quality
• Type: Seamless
• Technique: Hot-Rolled+Cold-Drawn
• Material: Alloy Steel
• Surface Treatment: as Required
• Usage: for Oil Equipment
• Section Shape: Round
• Cutting Service: Available
• Mtc: 3.1 or 3.2 Certificate
• Delivery Condition: a, N, Q+T
• Transport Package: Seaworthy Standard Package
• Specification: 30-850mm
• Trademark: SHUNFU
• Origin: China
• HS Code: 7304192000
• Production Capacity: 50000tons/Year

Product Description

Seamless circular steel tubes for mechanical and general engineering purposes

Our specialized process for seamless tubing manufacturing begins with either an extruded hollow tube or a solid bar drilled to our exacting specifications. The material is then reduced in size a number of times through various cold working techniques until it reaches the specific size, tolerances, and temper required by our customer. After each cold working cycle the tubes are cut, cleaned and heat treated in preparation for the next cold working step.
 

Supplier quality assurance and development

We manage and control our list of suppliers according to the needs of our customers and regulatory requirements through a supplier QA and development program. Its goals are to:

1. Increase regular two-way communication between SHUNFU and its customer
2. Understand customer and their capabilities
3. Build mutually beneficial long-term relationships with suppliers
4. Identify, prevent and mitigate risks affecting the supply chain
5. Rationalize our list based on supplier performance data
6. Identify supplier improvement opportunities
7. Integrate key customer into product development projects
8. Uncover hidden costs and cost drivers
9. Improve our competitiveness by strengthening our part of the end customer value chain

 

Description

Tubing used for mechanical and light gauge structural applications. Mechanical tube is produced to meet specific end use requirements, specifications, tolerances and chemistries. This allows for more specific property uniformity throughout the tube compared to standard pipe or tube. While Mechanical tube can be produced to standard specifications when requested, it is often produced to typical properties that focus mainly on the yield strength for a precise size and wall thickness. In some applications with severe forming, yield strength may not even be specified and the mechanical tube is produced to be fit for use. Mechanical tubing encompasses a wide range of both structural and non-structural applications.
 

Dimensions and Tolerances

T Wall thickness: 2.3-50mm (±1%)
D Outside diameter:26.9-850mm (±12,5%)
Length The tubes shall be delivered in random lengths / Exact lengths
 

Appearance

1 The tube shall be free from external and internal surface defects that can be established by visual inspection.
2 The internal and external surface finish of the tubes shall be typical of the manufacturing process and, where applicable, the heat treatment employed. The finish and surface condition shall be such that any surface imperfections requiring dressing can be identified.
3 It shall only be permissible to remove surface imperfections, by grinding or machining, provided that, after so doing the tube thickness in the dressed area is not less than the specified minimum wall thickness. All dressed areas shall blend smoothly into the contour of the tube.
4 Surface imperfections which encroach on the minimum wall thickness shall be considered defects and tubes containing these shall be deemed not to conform to this Part of this European Standard.
 

Straightness

The deviation from straightness of tubes with an outside diameter D equal to or greater than 33,7 mm shall not exceed 0,0015 L (L = Length of the tube). The deviation from straightness, for tubes with D less than 33,7 mm, is not specified.
 

End preparation

Tubes shall be delivered with square cut ends. The ends shall be free from excessive burrs.
 

Marking

Example: X-EN 10297-1 - C15R+FP - Y - Z
X is the manufacturers name or trademark
Y is the mark of inspection representative
Z is the identification number (e.g. order or item number)
 

Protection

Tubes shall be specially protected for transit and storage.
Inspection
Cast Analysis
Tensile test
Impact test
Dimensional inspection
Visual examination
Material identification of alloy steel tubes
Tensile test on heat treated sample
Verification of hardness range
Hardness test
Hardenability test
Non-destructive test for imperfections
Leak tightness test
 

Chemical composition (cast analysis) for non-alloy quality steel, in % by mass

Steel grade		C		Si		Mn		P	S
Steel name	Steel number	min.	max.	min.	max.	min.	max.	max.	max.
E235	1.0308		0,17	-	0,35	-	1,20	0,030	0,035
E275	1.0225		0,21	-	0,35	-	1,40	0,030	0,035
E315	1.0236		0,21	-	0,30	-	1,50	0,030	0,035
E355	1.0580		0,22	-	0,55	-	1,60	0,030	0,035
E470	1.0536	0,16	0,22	0,10	0,50	1,30	1,70	0,030	0,035
E470 Other elements Al min 0,010,N max. 0,020, Nb max. 0,07, V 0,08/0,15

 

Mechanical properties for tubes made of steels

Steel grade		Delivery condition	Minimum tensile properties
Steel name	Steel number		Yield strength (ReH) Mpa For T in mm					Tensile strength (Rm) Mpa For T in mm				Elongation A %
			≤ 16	> 16 ≤ 40	> 40 ≤ 65	> 65 ≤ 80	> 80 ≤ 100	≤ 16	> 16 ≤ 40	> 40 ≤ 65	> 65 ≤ 100	l	t
E235	1.0308	+AR or +N	235	225	215	205	195	360	360	360	340	25	23
E275	1.0225	+AR or +N	275	265	255	245	235	410	410	410	380	22	20
E315	1.0236	+AR or +N	315	305	295	280	270	450	450	450	420	21	19
E355	1.0580	+AR or +N	355	345	335	315	295	490	490	490	470	20	18
E470	1.0536	+AR	470	430	-	-	-	650	600	-	-	17	15

 

Chemical composition (cast analysis) for tubes with specified impact properties in % by mas

Steel grade		C		Si		Mn		P	S	Cr	Mo		Ni		Al	Cu	N	Nb	Ti	V
Steel name	Steel number	min.	max.	min.	max.	min.	max.	max.	max.	max.	min.	max.	min.	max.	min.	max.	max.	max.	max.	min.	max.
E275K2	1.0456	-	0,20	-	0,40	0,50	1,40	0,030	0,030	0,30	-	0,10	-	0,30	0,020	0,35	0,015	0,05	0,03	-	0,05
E355K2	1.0920	-	0,20	-	0,50	0,90	1,65	0,030	0,030	0,30	-	0,10	-	0,50	0,020	0,35	0,015	0,05	0,05	-	0,12
E420J2	1.0599	0,16	0,22	0,10	0,50	1,30	1,70	0,030	0,035	0,30	-	0,08	-	0,40	0,010	0,30	0,020	0,07	0,05	0,08	0,15
E460K2	1.8891	-	0,20	-	0,60	1,00	1,70	0,030	0,030	0,30	-	0,10	-	0,80	0,020	0,70	0,025	0,05	0,05	-	0,20
E590K2	1.0644	0,16	0,22	0,10	0,50	1,30	1,70	0,030	0,035	0,30	-	0,08	-	0,40	0,010	0,30	0,020	0,07	0,05	0,08	0,15
E730K2	1.8893	-	0,20	-	0,50	1,40	1,70	0,025	0,025	0,30	0,30	0,45	0,30	0,70	0,020	0,20	0,020	0,05	0,05	-	0,12

 

Mechanical properties for tubes made of steels

Steel grade		Delivery condition	Minimum tensile properties											Impact properties
Steel name	Steel number		Yield strength (ReH) Mpa For T in mm					Tensile strength (Rm) Mpa For T in mm				Elongation A %		Minimum average absorbed energy, KV min., J at a test temperature of -20 °C
			≤ 16	> 16 ≤ 40	> 40 ≤ 65	> 65 ≤ 80	> 80 ≤ 100	≤ 16	> 16 ≤ 40	> 40 ≤ 65	> 65 ≤ 100	l	t	l	t
E275K2	1.0456	+N	275	265	255	245	235	410	410	410	380	22	20	40	27
E355K2	1.0920	+N	355	345	335	315	295	490	490	470	470	20	18	40	27
E420J2	1.0599	+N	420	400	390	370	360	600	560	530	500	19	17	27	20
E460K2	1.8891	+N	460	440	430	410	390	550	550	550	520	19	17	40	27
E590K2	1.0644	+QT	590	540	480	455	420	700	650	570	520	16	14	40	27
E730K2	1.8893	+QT	730	670	620	580	540	790	750	700	680	15	13	40	27

 

Chemical composition (cast analysis) for tubes made of non-alloy special steels in % by mass

Steel grade		C		Si		Mn		P	S
Steel name	Steel number	min.	max.	min.	max.	min.	max.	max.	max.
C22E	1.1151	0,17	0,24	-	0,40	0,40	0,70	0,035	0,035
C35E	1.1181	0,32	0,39	-	0,40	0,50	0,80	0,035	0,035
C45E	1.1191	0,42	0,50	-	0,40	0,50	0,80	0,035	0,035
C60E	1.1221	0,57	0,65	-	0,40	0,60	0,90	0,035	0,035
38Mn6	1.1127	0,34	0,42	0,15	0,35	1,40	1,65	0,035	0,035

 

Mechanical properties for tubes made of steels in delivery condition +N

Steel grade		Minimum tensile properties
Steel name	Steel number	Yield strength (ReH) Mpa For T in mm			Tensile strength (Rm) Mpa For T in mm			Elongation A
		≤ 16	> 16 ≤ 40	> 40 ≤ 80	≤ 16	> 16 ≤ 40	> 40 ≤ 80	≤ 16		> 16 ≤ 40		> 40 ≤ 80
								l	t	l	t	l	t
C22E	1.1151	240	210	210	430	410	410	24	22	25	23	25	23
C35E	1.1181	300	270	270	550	520	520	18	16	19	17	19	17
C45E	1.1191	340	305	305	620	580	580	14	12	16	14	16	14
C60E	1.1221	390	350	340	710	670	670	10	8	11	9	11	9
38 Mn 6	1.1127	400	380	360	670	620	570	14	12	15	13	16	14

 

Mechanical properties for tubes made of steels in delivery condition +QT

Steel grade		Minimum tensile properties
Steel name	Steel number	Yield strength (ReH) Mpa For T in mm				Tensile strength (Rm) Mpa For T in mm				Elongation A
		£ 8	> 8	> 20	> 50	≤ 8	> 8	> 20	> 50	£ 8		> 8	≤ 20	> 20	≤ 50	> 50	≤ 80
			≤ 20	≤ 50	≤ 80		≤ 20	≤ 50	≤ 80	l	t	l	t	l	t	l	t
C22E	1.1151	340	290	270	260	500	470	440	420	20	18	22	20	22	20	22	20
C35E	1.1181	430	380	320	290	630	600	550	500	17	15	19	17	20	18	20	18
C45E	1.1191	490	430	370	340	700	650	630	600	14	12	16	14	17	15	17	15
C60E	1.1221	580	520	450	420	850	800	750	710	11	9	13	11	14	12	14	12
38 Mn 6	1.1127	620	570	470	400	850	750	650	550	13	11	14	12	15	13	16	14

 

Chemical composition (cast analysis) for tubes made from alloy special steels in % by mass

Steel grade		C		Si	Mn		P	S	Cr		Mo		Ni
Steel name	Steel number	min.	max.	max.	min.	max.	max.	max.	min.	max.	min.	max.	min.	max.
41Cr4	1.7035	0,38	0,45	0,40	0,60	0,90	0,035	0,035	0,90	1,20	-	-	-	-
25CrMo4	1.7218	0,22	0,29	0,40	0,60	0,90	0,035	0,035	0,90	1,20	0,15	0,30	-	-
30CrMo4	1.7216	0,27	0,34	0,35	0,35	0,60	0,035	0,035	0,80	1,15	0,15	0,30	-	-
34CrMo4	1.7220	0,30	0,37	0,40	0,60	0,90	0,035	0,035	0,90	1,20	0,15	0,30	-	-
42CrMo4	1.7225	0,38	0,45	0,40	0,60	0,90	0,035	0,035	0,90	1,20	0,15	0,30	-	-
36CrNiMo4	1.6511	0,32	0,40	0,40	0,50	0,80	0,035	0,035	0,90	1,20	0,15	0,30	0,90	1,20
30CrNiMo8	1.6580	0,26	0,34	0,40	0,30	0,60	0,035	0,035	1,80	2,20	0,30	0,50	1,80	2,20
41NiCrMo7-3-2	1.6563	0,38	0,44	0,30	0,60	0,90	0,025	0,025	0,70	0,90	0,15	0,30	1,65	2,00

 

Mechanical properties for tubes made of steels in delivery condition +QT

Steel grade		Minimum tensile properties
Steel name	Steel number	Yield strength (ReH) Mpa For T in mm				Tensile strength (Rm) Mpa For T in mm				Elongation A
		≤ 8	> 8	> 20	> 50	≤ 8	> 8	> 20	> 50	≤ 8		> 8	≤ 20	> 20	≤ 50	> 50	≤ 80
			≤ 20	≤ 50	≤ 80		≤ 20	≤ 50	≤ 80	l	t	l	t	l	t	l	t
41 Cr 4	1.7035	800	660	560	-	1 000	900	800	-	11	9	12	10	14	12	-	-
25 Cr Mo 4	1.7218	700	600	450	400	900	800	700	650	12	10	14	12	15	13	16	14
30 Cr Mo 4	1.7216	750	630	520	480	950	850	750	700	12	10	13	11	14	12	15	13
34 Cr Mo 4	1.7220	800	650	550	500	1 000	900	800	750	11	9	12	10	14	12	15	13
42 Cr Mo 4	1.7225	900	750	650	550	1 100	1 000	900	800	10	8	11	9	12	10	13	11
36 Cr Ni Mo 4	1.6511	900	800	700	600	1 100	1 000	900	800	10	8	11	9	12	10	13	11
30 Cr Ni Mo 8	1.6580	1 050	1 050	900	800	1 250	1 250	1 100	1 000	9	7	9	7	10	8	11	9
41 Ni Cr Mo 7-3-2	1.6563	950	870	800	750	1 150	1 050	1 000	900	9	7	10	8	11	9	12	10