JIS G3454 Carbon steel pipes

JIS G3454 Carbon steel pipes

carbon steel pipe, JIS G3454, JIS G3454 STPG370, JIS G3454 STPG410, steel tube, steel tubes 

JIS G3454 standard specifies the carbon steel pipes, hereinafter referred to as the pipes.

Standard:

• JIS G3454 Carbon steel pipes for pressure service at an approximate maximum temperature of 350 Degrees Celsius.

Size range of JIS G3454 (mm):

• Outer Dimensions: 19.05mm- 114.3mm
• Wall Thickness:2.0mm -14 mm
• Length: max 16000mm

Application:

• Carbon steel pipes for pressure service
• High pressure service and high temperature service

Packing:

• Packing: in bundles
• Surface: Varnish coating
• Ends: Beveled or Plain ends with Plastic caps

Inspection & Certification:

• 1) Certification: ISO, API, ASTM, DIN etc.
• 2) Mill Test Certificate: EN10204/3.1B
• 3) Third party inspection: SGS, BV, Lloyds etc.

The main products of steel / steel grade:

• JIS G3454 STPG370
• JIS G3454 STPG410

Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
Painting: as requested.

Chemical Compositions(%) of JIS G3454

Grade	C	Si	Mn	P	S
STPG370	≤0.25	≤0.35	0.30-0.90	≤0.040	≤0.040
STPG410	≤0.30	≤0.35	0.30-1.00	≤0.040	≤0.040

Mechanical Properties of JIS G3454

Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation (%)
JIS G3454 STPG370	≥216	≥370	≥30
JIS G3454  STPG410	≥245	≥410	≥25

Pertaining to the electric-resisitance welded steel tubes, when previously agreed upon with the manufacturer, the purchaser may designate the supplementary quality requirements Z3 or Z4 speified in appendix, in addition to the items specified in this text.

JIS G3441 Alloy Steel Tubes for General Structural Purpose

JIS G3441 Alloy Steel Tubes for General Structural Purpose

JIS G3441, JIS G3441 SCM415TK, JIS G3441 SCM418TK, JIS G3441 SCM420TK, JIS G3441 SCM430TK, JIS G3441 SCM435TK, JIS G3441 SCM440TK, JIS G3441 SCr420TK, steel tube, steel tubes 

JIS G3441 alloy steel tubes are widely used in mechanical structure, natural gas, oil, water transportation, chemical fertilizer equipment with boiler ect.

Application of  JIS G3441 alloy steel tubes:

mechanical structure, natural gas, oil, water transportation, chemical fertilizer equipment with boiler, petroleum cracking, geological drilling, oil drilling, etc.

Quality Standard and Steel Grade:

• JIS G3441 SCr420TK
• JIS G3441 SCM415TK
• JIS G3441 SCM418TK
• JIS G3441 SCM420TK
• JIS G3441 SCM430TK
• JIS G3441 SCM435TK
• JIS G3441 SCM440TK

Size range of JIS G3441 Alloy Steel Tubes:

Tolerance on Outside Diameter in JIS G3441

O.D.(mm)	Tolerance(%)
<13 td>	±0.25
<13-25	±0.40
<25-40	±0.60
<40-65	±0.80
<65-90	±1.00
<90-140	±1.20
<140	By agreement

Tolerance on Wall Thickness in JIS G3441

W.T.(mm)	Tolerance
< td>	-0.5,+0.6
<4	-12.5%, +15%

How to test JIS G3441 Alloy Steel Tubes:

• Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation)
• Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc)
• Exterior Size Inspection.
• Mill Test Certificate:EN 10204/3.1B
• Delivery Condition:BKS, NBK,BK ,BKW, GBK(+A), NBK(+N), BK(+C)

JIS G3441 Alloy Steel Tubes Chemical composition Limits(%)

Steel grade	Steel grade(old)	C	Si	Mn	P	S	Cr	Mo
SCr420TK	–	0.18~0.23	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30
SCM415TK	–	0.13~0.18	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30
SCM418TK	–	0.16~0.21	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30
SCM420TK	–	0.18~0.23	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30
SCM430TK	As STKS1	0.33~0.38	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30
SCM435TK	As STKS3	0.33~0.38	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30
SCM440TK	–	0.38~0.43	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30

 Packing:

• Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips
• Two tags on each bundle
• Wrapped in waterproof paper
• PVC sleeve, and sackcloth with several steel strips

DIN2391 Seamless Precision Steel Tube

DIN2391 Seamless Precision Steel Tube

DIN2391 Seamless Precision Steel Tube

BKS, carbon steel tubes, din 2391, precision steel tube, Seamless tube, seamless tubes, steel tubes

DIN 2391 standard specifies theSeamless Precision Steel Tube used for Mechanical and Automobile.

Carbon steel tubes for machine structural purposes .
Standard:

• DIN2391-1: Seamless Precision Steel Tube.
• EN 10305-1: Steel tubes for precision applications.

Size (mm):

• Outer Dimensions: 4.0mm-60.0mm
• Wall Thickness: 0.5mm-8 mm
• Length: max 6000mm

Application:

• motor-car construction
• pneumatic
• hydraulic operating mechanisms

Steel grade:

• DIN2391-1 ST35
• DIN2391-1 ST45
• DIN2391-1 ST52

Delivery Condition:

• GBK, BKS, BK, BKW, NBK

Inspection and Test:

• Chemical Composition, Mechanical Properties
• Visual and Dimension Test
• NDT
• Grain Size Test

Surface treatment:

• Oil-dip, Varnish, Shot Blasting

Packing:

• Inner packing:Caps on two ends of every pipe
• Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
• Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
• Marking: as per customers requirement

DIN2391-1: Chemical compositions(%)

Grade	C	Si	Mn	P	S
DIN2391 ST35	≤0.17	≤0.35	≥0.40	≤0.050	≤0.050
DIN2391 ST45	≤0.21	≤0.35	≥0.40	≤0.050	≤0.050
DIN2391 ST52	≤0.22	≤0.55	≥1.60	≤0.050	≤0.050

DIN2391-1: Mechanical properties

Grade	BK		BKW		BKS			GBK		NBK
	Rm N/mm min	min	Rm N/mm min	min	N/ mm min	ReH N/mm min	min	N/ mm min	min	N/mm min	ReH N/mm min	min
DIN2391 ST35	480	6	420	10	420	315	14	315	25	340-470	235	25
DIN2391 ST45	580	5	520	8	520	375	12	390	21	440-570	235	21
DIN2391 ST52	640	4	580	7	580	420	10	490	22	490-630	355	22

EN 10297 Mechanical seamless Tubes

EN 10297 Seamless circular steel tubes for mechanical and general engineering purposes. Technical delivery conditions. Non-alloy and alloy steel tubes.
Standard: BS EN 10297-1:2003

Applications of  EN10297:

Alloy and non-alloy steel pipes, with circular section for mechanical and engineering applications.

Process: Seamless

Tolerance and size range :

Outside diameter:
D<=219.1mm: +/-1%(Min+/-0.5mm)
D>219.1mm:+/-1%

Thickness:
D<=219.1mm:+/-12.5%(min +/-0.4mm)
D>219.1mm: itchanges according to the ratio thickness/ diameter

Tolerance on thickness related to t/CD:

<=0.025	0.025<T<=0.050	>0.050
+/- 20%	+/-15%	+/-12.5%

Size range: According to DIN_EN_10220-2003 unless differently spcified by the customer

Straightness

D<33.7mm :not specified
D>=33.7mm :0.15% on the total length

Note:

D: Outside diameter
T: Nominal thickness (mm)

Out of proundness

Included in the outside diameter tolerance

Standard and Steel grade:

• EN 10297 E235
• EN 10297 E355
• EN 10297 C35E
• 20MnV6

Certification: UNI EN10204.3.1

Chemical analysis [%] of  EN 10297:

Steel grade	C	Si	Mn	P	S
E235	≤0,17	≤0,35	≤1,20	≤0,040	≤0,045
E355	≤0,22	≤0,55	≤1,60	≤0,040	≤0,045
C35E	0,32 – 0,39	≤0,40	0,50 – 0,80	≤0,035	≤0,035
20MnV6	0,16 – 0,22	0,10 – 0,50	1,30 – 1,70	≤0,035	≤0,040

Mechanical properties of EN 10297:

Steel grade	Supply condtion	ReH min [MPa]		Rm min [MPa]		A [%]
		T≤16	16<T≤25	T≤16	16<T≤25
E235	AR	235	225	360	360	25
E355	AR	355	345	490	490	20
C35E	N	300	280	520	500	17
20MnV6	AR	470	450	650	620	17

Condition on delivery:

Term	Symbol	Explanation
Cold-finished/hard (cold-finished as-drawn)	BK	No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)	BKW	After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed	GBK	After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized	NBK	The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.

Tubes according to EN 10305-1

EN 10305 Seamless cold drawn precision steel tubes for mechanical applications and for hydraulic and pneumatic power systems.

Typical fields of application are in the automotive, furniture and general engineering industries.

Steel tubes for precision applications-Technical delivery conditions-Part 1: Seamless cold drawn tubes.

Seamless Precision Steel Tubes according to EN 10305-1

Standard and Steel grade:

• EN10305-1 E215
• EN10305-1 E235
• EN10305-1 E355

Feature:

High precision and high brightness, the inner and outer surface of the tubes have high cleanness without oxid mechanical properties of the final tubes also come out excellent promising no leakage under high pressure no deformation after cold-bent and no cracks when flaring and flattening ensuring the efficient operation in all service.

Chemical analysis [%] of  EN10305-1

Steel grade	C	Si	Mn	P	S	V	Nb	Al
EN10305-1 E215	≤0,10	≤0,05	≤0,70	≤0,025	≤0,025	-	-	≥0,025
EN10305-1 E215	≤0,17	≤0,35	≤1,20	≤0,025	≤0,025	-	-	-
EN10305-1 E215	≤0,22	≤0,55	≤1,60	≤0,025	≤0,025	-	-	-

 Mechanical properties of  EN10305-1

Steel grade	+C		+LC		+SR			+A		+N
	Rm	A	Rm	A	Rm	ReH	A	Rm	A	Rm	ReH	A
	MPa	%	MPa	%	MPa	MPa	%	MPa	%	MPa	MPa	%
E215	430	8	380	12	380	280	16	280	30	290 – 430	215	30
E235	480	6	420	10	420	350	16	315	25	340 – 480	235	25
E355	640	4	580	7	580	450	10	450	22	490 – 630	355	22

Quality grade

The tubes are supplied in the following quality grades :

A) precision steel tubes intended primarily for mechanical stressing, without any particular quality requirement and without acceptance test certificate.
B) precision steel tubes intended primarily for mechanical stressing, with special quirement and exclusively with acceptance test certificate.
C) precision steel tubes with special requirement according to section 12. Theses requirements and corresponding tests must be agreed, with the customer having to specify his requirements at the time of enquiry and on ordering.

Condition on delivery:

Term	Symbol	Explanation
Cold-finished/hard (cold-finished as-drawn)	BK	No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)	BKW	After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed	GBK	After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized	NBK	The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.