JIS G3462 Grade Stba 22 Alloy Steel Tubes

• After-sales Service: According to The Actual Project Application
• Warranty: According to The Actual Project Application
• Type: Seamless
• Technique: Cold Drawn
• Material: Alloy Steel
• Surface Treatment: Varnishing
• Model NO.: KM-20230509
• Usage: Boiler Pipe, Oil/Gas Drilling, Heat Exchanger Tubes
• Section Shape: Round
• Standards: JIS G3462 ,JIS G3461
• Materials: Stba 20,Stba 23,Stba 24,Stba 25,Stba 26
• Production Process: Cold Drawn or Hot Rolled
• Application: Heat Exchanger Tubes, Condenser Tubes, Water Tubes
• Transport Package: in Bundles or Plywood Cases
• Specification: 25 mm--139.8 mm
• Trademark: KINGMETAL
• Origin: China
• HS Code: 7304511090
• Production Capacity: 1000 Tons Per Month

Product Description

JIS G3462 Grade STBA 22 Alloy Seamless Tubes
 
Standard:JIS G3462
Alloy steel tubes for boiler and heat exchanger
 
JIS G3462 specifies the alloy steel tubes (hereafter referred to as "tubes") used for exchanging heat between the inside and outside of the tube, such as water tubes,smoke tubes, superheater tubes and air preheater tubes of boilers, and heat exchanger tubes, condenser tubes and catalyst tubes used in chemical and petroleum industries.
 
 
 
JIS G3462 STBA22 Alloy boiler and heat exchanger tubes Quick Details
Manufacture:Seamless; Cold finished ,Hot finished
Wall thickness(WT): 2.0 mm--12.7 mm.
Outer diameter (OD): 25 mm--139.8 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
 
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
 
 
Manufacturing method
(1)The tubes of STBA23 are manufactured by seamless process.
(2) Plain end finishing are applied to the shape of tube end.
 
 

Composition Table Of JIS G3462 Alloy Steel Boiler And Heat Exchanger Tubes

 

Grade	Chemical Composition Limits (%)
	C	Si	Mn	P	S	Cr	Mo
JIS G3462 STBA12	0.10-0.20	0.10-0.50	0.30-0.80	≤ 0.035	≤ 0.035	-	0.45-0.65
JIS G3462 STBA13	0.15-0.25	0.10-0.50	0.30-0.80	≤ 0.035	≤ 0.035	-	0.45-0.65
JIS G3462 STBA20	0.10-0.20	0.10-0.50	0.30-0.60	≤ 0.035	≤ 0.035	0.050-0.080	0.45-0.65
JIS G3462 STBA22	≤ 0.15	≤ 0.50	0.30-0.60	≤ 0.035	≤ 0.035	0.80-1.25	0.45-0.65
JIS G3462 STBA23	≤ 0.15	0.50-1.00	0.30-0.60	≤ 0.030	≤ 0.030	1.00-1.50	0.45-0.65
JIS G3462 STBA24	≤ 0.15	≤ 0.50	0.30-0.60	≤ 0.030	≤ 0.030	1.90-2.60	0.87-1.13
JIS G3462 STBA25	≤ 0.15	≤ 0.50	0.30-0.60	≤ 0.030	≤ 0.030	4.00-6.00	0.45-0.65
JIS G3462 STBA26	≤ 0.15	0.25-1.00	0.30-0.60	≤ 0.030	≤ 0.030	8.00-10.00	0.90-1.10

 

Outer Diameter And Wall Thickness Of JIS G3462 Heat Exchanger & Boiler Tubes

 

Execution	Size Range	OD Tolerance	Wall tolerance
Hot-rolled Tube	OD - 80 mmOD > 80 mmWall < 12 mmWall - 12 mm	± 0.4 mm± 0.5 % of OD	± 0.7 mm± (5 % x wallthickness + 0.1 mm
Hot-rolled peeled tube	All sizesWall < 12 mmWall - 12 mm	+ 0.25/- 0 mm	± 0.8 mm± (5 % x wall thickness+ 0.2 mm)
Cold Worked tubecold-rolled or cold-drawn	OD < 40 mmOD 40 - 80 mmOD > 80 Wall Thickness< 6 mm Wall Thickness6 - 8 mm Wall Thickness > 8	+ 0.30/- 0 mm*+ 0.35/- 0 mm*+ 0.40/- 0 mm*	± 0.30 mm± 0.35 mm± 0.40 mm

 

 

 

All Sizes and wall thickness in JIS G3462 Grade STBA 22 Alloy Steel Seamless Tubes

 

Mechanical Strength Table Of JIS G3462 Grade STBA 22 Alloy Steel Seamless Tubes

Grade	Tensile Property (N/mm2) ( ≥ )	Yield Point or Yield Strength (N/mm2) ( ≥ )	Elongation (%)
			OD ≥ 20 mm	10 mm ≤ OD <20 mm	OD <10 mm
			NO. 11 Sample; NO. 12 Sample	NO. 11 Sample	NO. 11 Sample
			Longitudinal	Transverse	Transverse
JIS G3462 STBA12	382	206	≥ 30	≥ 25	≥ 22
JIS G3462 STBA13	412	206	≥ 30	≥ 25	≥ 22
JIS G3462 STBA20	412	206	≥ 30	≥ 25	≥ 22
JIS G3462 STBA22	412	206	≥ 30	≥ 25	≥ 22
JIS G3462 STBA23	412	206	≥ 30	≥ 25	≥ 22
JIS G3462 STBA24	412	206	≥ 30	≥ 25	≥ 22
JIS G3462 STBA25	412	≥ 206	≥ 30	≥ 25	≥ 22
JIS G3462 STBA26	412	206	≥ 30	≥ 25	≥ 2