Name: JIS G3461 STB340S Carbon Steel Tube For Boiler Heat Exchanger, Boiler Water Tube, Economizer Tube
Brand: Yuhong Group Co.,Ltd
SKU: TP304 , SUS304 , 1.4301 , 08X18H10
Price: 150000 USD
Availability: InStock

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Home Products Stainless Steel Seamless Tube

JIS G3461 STB340S Carbon Steel Tube For Boiler Heat Exchanger, Boiler Water Tube, Economizer Tube

Product Details:

Place of Origin:	CHINA
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001, ISO 14001, ISO18001, ASME
Model Number:	TP304 , SUS304 , 1.4301 , 08X18H10

Payment & Shipping Terms:

Minimum Order Quantity:	1PC
Price:	Negotiable
Packaging Details:	Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Delivery Time:	5-80 Days
Payment Terms:	L/C, D/A, D/P, T/T
Supply Ability:	15000tons/month

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Detailed Product Description

Standard:	JIS G3461	Material:	STB340S
OD:	1/2" (12.7mm), 5/8" (15.88mm), 3/4"(19.05mm), 1" (25.4mm), 1-1/4" (31.75mm), 1-1/2"(38.1mm) 1-3/4"(44.45mm), 2" (50.8mm), 2-1/4" (57.15mm) 2-1/2" (63.5mm) 3" (76.2mm),4" (101.6mm)	Wall Thickness:	22BWG ( 0.71mm), 20BWG (0.89mm), 18BWG(1.24mm), 16BWG(1.65mm), 14BWG(2.11mm), 12BWG(2.77mm), 10BWG(3.4mm)
NDT:	Eddy Current Test, Hydrostatic Test, Ultrasonic Test	End:	Beveled End, Plain End

JIS G3461 STB340S Carbon Steel Tube For Boiler Heat Exchanger, Boiler Water Tube, Economizer Tube

ASTM A270 TP304 austenitic stainless steel seamless pipe conforms to the American Society for Testing and Materials (ASTM) A270/A270M standards. It is an 18-8 type stainless steel, with a seamless structure achieved through hot rolling/cold drawing, resulting in a weld-free, high-pressure-resistant, and high-strength finish.

The pipe ends are precision CNC threaded, ensuring high accuracy and concentricity. They can be directly and quickly screwed onto standard fittings, valves, and connectors, achieving a tight seal without welding. The pipes are replaceable, leak-proof, and pressure-resistant.

TP304 material offers excellent corrosion resistance, is hygienic and non-toxic, easy to clean, and has a smooth inner wall. It meets 3-A and FDA hygiene requirements, is resistant to high-temperature steam sterilization, and is compatible with CIP/SIP cleanroom systems.

Widely used in food and beverage, pharmaceutical, bioengineering, clean fluid, water supply and drainage, and chemical piping industries, it is an ideal pipe material for sanitary and industrial-grade threaded connections.

Chemical Composition (Ladle Analysis, %)
Element	STB340S Requirement (max or range)	Typical Value	Standard Reference
C (Carbon)	≤ 0.25	~0.15–0.20	JIS G3461
Si (Silicon)	0.10 – 0.35	~0.20	JIS G3461
Mn (Manganese)	0.30 – 0.80	~0.50	JIS G3461
P (Phosphorus)	≤ 0.030	≤0.020	JIS G3461 (stricter for S grade)
S (Sulfur)	≤ 0.015	≤0.010	JIS G3461 (stricter for S grade)

Mechanical Properties
Parameter	Requirement	Standard Reference
Tensile Strength (Rm)	≥ 340 MPa	JIS G3461
Yield Strength (Rp0.2 or lower yield point ReL)	≥ 195 MPa (wall thickness ≤16mm)	JIS G3461
Elongation (longitudinal, 50mm gage length)	≥ 30% (WT ≤8mm)	JIS G3461
	≥ 28% (8 < WT ≤16mm)
	≥ 27% (WT >16mm)
Flattening Test	No cracks	JIS G3461
Flaring Test	No cracks	JIS G3461

Physical Properties
Parameter	Value	Unit
Density	~7.85	g/cm³
Elastic Modulus (20°C)	~205	GPa
Thermal Conductivity	~50	W/(m·K)
Coefficient of Linear Expansion (20–300°C)	~12.0	×10⁻⁶/°C
Specific Heat Capacity	~460	J/(kg·K)

Heat Treatment Requirements
Condition	Process	Requirement
Delivery Condition	Normalized or Annealed	Final heat treatment must be performed after manufacturing
Normalizing Temperature	Approx. 880–930°C, air cooling	Ensures grain refinement and uniform mechanical properties
Annealing Temperature	Approx. 880–930°C, furnace cooling	Softens the tube, reduces hardness

Application

Boiler Systems: Water-cooled wall tubes, flue tubes, and boiler body piping for small industrial boilers
Heat Exchangers: Shell-and-tube heat exchangers, condensers, and cooler tube bundles
Pipeline Systems: Medium and low-pressure steam pipelines and water supply pipelines
General Pressure Vessels: Heat exchange elements subjected to medium temperature and pressure