JIS G3462 Steel Tube

Description

JIS G3462 specifies the alloy steel boiler tubes for exchanging heat on the inside and outside of the water tube,smoke tube superheater tubes,ect.

JIS G3462 specifies the alloy boiler steel tubes used for exchanging heat on the inside and outside of the tube, with 8 steel grades from STBA12-STBA26, it has the similar application as JIS G3461, steel tube of this specification could be supplied as U tube. However, it is not applicable to the steel tubes for heating furnace and those for heat exchangers of low temperature service. For final product, heat treatment of the bent portion is not usually performed. However, if there is a request from the orderer, agreement on heat treatment. Sunny Steel is an experienced boiler and pressure steel tube supplier which can offer you JIS G3462 steel tube of all grade and dimension range.

Standard:

• JIS G3462 Carbon steel boiler and heat exchanger tubes

Equipoutlet mainly produces different grades of alloy steel pipes, such as STBA12, STBA13, STBA20, STBA22, STBA23, STBA24, STBA25, STBA26, etc.

• STB12
• STB13
• STB20
• STB22
• STB23
• STB24
• STB25
• STB26

Molybdenum steel tube: STB12, STB13

Chromium-molybdenum steel tube:STB20,STB22,STB23,STB24,STB25,STB26

The JIS G3462 boiler tube Size:

The Outer dimension is from 19.05 mm to 168.3 mm & wall thickness ranges from 3.0 mm to 14 mm. JIS G3462 alloy steel tube is not applicable for heating heat exchangers and furnaces for low temperature service.

• Outer Dimensions: 19.05mm – 168.3mm
• Wall Thickness:2.0mm – 14 mm
• Length: max 19000mm

Chemical  composition(%) of JIS 3462

Grade	C	Mn	P	S	Si	Cr	Mo
STBA12	0.10-0.20	0.30-0.80	≤0.035	≤0.035	0.10-0.50	…	0.45-0.65
STBA13	0.15-0.25	0.30-0.80	≤0.035	≤0.035	0.10-0.50	…	0.45-0.65
STBA20	0.10-0.20	0.30-0.60	≤0.035	≤0.035	0.10-0.50	0.05-0.08	0.45-0.65
STBA22	≤0.15	0.30-0.60	≤0.035	≤0.035	≤0.50	0.08-1.25	0.45-0.65
STBA23	≤0.15	0.30-0.60	≤0.030	≤0.030	0.50-1.00	1.00-1.50	0.45-0.65
STBA24	≤0.15	0.30-0.60	≤0.030	≤0.030	≤0.50	1.90-2.60	0.87-1.13
STBA25	≤0.15	0.30-0.60	≤0.030	≤0.030	≤0.50	4.00-6.00	0.45-0.65
STBA26	≤0.15	0.30-0.60	≤0.030	≤0.030	0.25-1.00	8.00-10.0	0.90-1.10

Note:

OD refers to the outside diameter.
The above table is only applicable for heat exchanger alloy steel pipes. The buyer can appoint the upper limit value of tensile strength. The upper limit value of tensile strength is the above shown value plus 147 N/mm2.
For the alloy steel tube with the thickness of less than 8 mm, we use NO.12 sample for tensile test. The minimum elongation will be reduced by 1.5% from the table value when the thickness reduces 1 mm. The value ​​obtained will be rounded to an integer value according to JIS Z 8401 (a rounding method).
When we take the electric resistance welded steel pipes for tensile test, we also choose NO.12 sample from the parts not containing welding seams.

Mechanical proertiesof JIS G3462

Grade	Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)
STBA12	≥382	≥206	≥30
STBA13	≥412	≥206	≥30
STBA20	≥412	≥206	≥30
STBA22	≥412	≥206	≥30
STBA23	≥412	≥206	≥30
STBA24	≥412	≥206	≥30
STBA25	≥412	≥206	≥30
STBA26	≥412	≥206	≥30

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

The tubes shall be manufactured by seamless process, electric resistance welding process, or butt welding process, and those of other grades shall be manufactured by seamless process or electric resistance welding process. The tube shall be as manufactured or as cold-finished condition, or they shall be subjected to appropriate heat treatment.

The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube. The tubes shall be free from defects detrimental to practical use.

Higher temperature resistance or capacity corrosion, end up being widely used by petroleum, chemical engineering, boiler, heat exchanger and other power areas. JIS G3462 alloy steel tube is not applicable for heating furnaces and heat exchangers for low temperature service.

Size Array of JIS G3462 Alloy Steel Pipe

• Outer dimension is from 19.05 mm to 168.3 mm.
• Wall thickness ranges from three.0 mm to 14 mm.
• The particular length of such alloy steel tube is 19000 millimeters.

Equivalent steel grade of JIS G3462

KS		ASTM		JIS		DIN		BS
Grade number	Grade	Grade number	GRADE	Grade number	Grade	Grade number	Grade	Grade number
D 3572	STHA12	A161	T1	JIS G3462	STBA12	17175	15Mo 3	-
		A209	T1
STHA13	A209	T1a	STBA13		-	-	-	-
STHA20	A213	T2	STBA20		-	-	-	-
STHA22	A213	T12	STBA22		17175	13Cr Mo 44	3059	S1 620
								S2 620
								ERW620
								CEW620
STHA23	A199	T11	STBA23		-	-	-	-
	A200	T11
	A213	T11
STHA24	A199	T22	STBA24		17175	10Cr Mo910	3059	S1 622-440
	A200	T22						S2 622-440
	A213	T22
STHA25	A199	T5	STBA25		-	-	-	-
	A200	T5
	A210	T5
STHA26	A199	T9	STBA26		-	-	-	-
	A200	T9
	A213	T9

Heat treatment of JIS G3462

Symbol of class	JIS G3462 Heat treatment
STBA 12 STBA 13	Low temperature annealing, isothermal annealing, full annealing, normalizing or normalizing followed by tempering
STBA 20 STBA 22	Low temperature annealing, isothermal annealing, full annealing, normalizing or normalizing followed by tempering
STBA 23 STBA 24 STBA 25 STBA 26	Isothermal annealing, full annealing or normalizing followed by tempering

Advantages

JIS G3462 regulates the allowable size deviation of alloy steel pipes, but JST advanced rolling technology can effectively lessens the deviation range and inside the dimension of alloy steel tube better. We may also supply other sizes of pipes solution . customers’ requirements, but ought to ensure these alloy steel pipes pursue IS G3462 standards.

In production process, there always exists flaw, scar, wrinkling, laceration, rolling burr and other defects on alloy steel tube. JST configures UNICORN ultrasonic joint inspection machine, automatic ultrasonic testing equipment, magnetic flux inspection machine and other styles of inspection machines. They can test our alloy steel pipes.

JST also employs professional surface inspectors who’s able to test the inconspicuous defects on the lining and outside surface of alloy steel tubes. As mentioned by the defect characteristics, perform polishing, removal, repair when a series of processes.

 

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Japanese Industrial Standards (JIS) developed by the organization apply to a wide variety of industrial services and technologies such as automobiles, metallurgy, ships and medical equipment

The method for making cold-drawn seamless pipes involves taking a round “billet” or bar of steel and boring it in the center, turning it, cutting it, heating it to make it more pliable, then “drawing” it (extruding or pulling it) to make it a longer and thinner tube.

Japanese Industrial Standards for steel

Japanese Industrial Standards specifies the standards used for industrial activities in Japan. The standardization process is coordinated by Japanese Industrial Standards Committee and published through Japanese Standards Association.

The Industrial Standardization Law was revised in 2004 and the JIS mark product certification system was changed. Standards are named like “JIS X 0208:1997″, where X denotes area division, followed by four digits (or five digits for some of the standards corresponding ISO standards) and the revision release year.

• G – Ferrous Materials and Metallurgy
• H – Nonferrous Materials and Metallurgy

MTC IN EN 10204.3

EN 10204:2004 is for metallic products-and this norm tell us things about Types of inspection documents. There are no material standards.

Mostly material is defined with its chemical composition and mechanical properties in a public standars like ISO, EN, JIS, ASTM etc.

What is JIS?

Japanese Industrial Standards (JIS) specifies the standards used for industrial activities in Japan. The standardization process is coordinated by Japanese Industrial Standards Committee and published through Japanese Standards Association.

Tolerance of JIS seamless pipe

Table 1: Tolerance on Outside Diameter in JIS G3441, G3444, G3445

APPLICATION	TOLERANCE ON OUTSIDE DIAMETER (MM)
JIS G3441 JIS G3444 JIS G3445	50	±0.5
	>50	±1%
JIS G3441 JIS G3444 JIS G3445	<50	±0.25
	>50	±0.5%
JIS G3441 JIS G3445	<25	±0.12
	>25-40	±0.15
	>40-50	±0.18
	>5:.60	±0.20
	>60-70	±0.23
	>70-80	±0.25
	>80-90	±0.30
	>90-100	±0.40
	>100	±0.5%
JIS G3441	<13	±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

Table 2: Tolerance on Wall Thickness in JIS G3441, G3444, G3445

APPLICATION	TOLERANCE ON WALL THICKNESS (MM)
JIS G3441 JIS G3444 JIS G3445	<=4	-0.5,+0.6
	>4	-12.5%, +15%
JIS G3441 JIS G3444 JIS G3445	<=3	±0 .3
	>3	±10%
JIS G3441 JIS G3445	<=2	±0.15
	>2	±8%

APPLICATION	TOLERANCE ON OUTSIDE DIAMETER		TOLERANCE ON WALL THICKNESS
	<40A	±0.5mm	<=4mm	+0.6mm
	>50A, <125A	±1%		-0.005
Hot rolled seamless pipes	150A	±1.6mm	>4mm	+15% -12.5%
	>200A	±0.8%
	More than 350mm,the tolerance is ±0.5%
Cold drawn seamless pipes and electric resistant welded pipes	<25A	±0.3mm	<=3mm	±0.3mm
	>32A	±0.8%	>3mm	±10%
	But more than 350mm, the tolerance is ±0.5%

Table 4: Tolerance on Outside Diameter and Wall Thickness in JIS G3455, G3456, G3458, G3460

APPLICATION	TOLERANCE ON OUTSIDE DIAMETER		TOLERANCE ON WALL THICKNESS
Hot Rolled Seamless Pipes	<=50mm	±0.5mm	<=4mm	±0.5mm
	>50-160mm	±1%
	>160-200mm	±1.6mm	>4mm	±12.5%
	>200mm	±0.8%
	More that 350mm, the tolerance is ±0.5%
Cold Drawn Seamless Pipes and Electric Resistant Welded Pipes	<=40mm	±0.3mm	<=2mm	±0.2mm
	>40mm	±0.8%	>2mm	±10%
	More than 350 mm the tolerance is ±0.5%