JIS S30400 347H Stainless Steel Round Pipe Price 316L PMI Inspection 16 Inch 20 Inch Tp347h Seamless Steel Tube for Heat Exchanger and Condenser

• Type: Stainless Steel Pipes
• Standard: ASTM, AISI, GB, JIS, DIN, EN
• Grade: 300 Series
• Model NO.: JIS S30400 347H
• Certification: ISO, RoHS, IBR, AISI, ASTM, GB, EN, DIN, JIS
• Shape: Round
• Technique: Cold Rolled
• Surface Treatment: Pickling
• Product Name: Stainless Steel Tube
• Delivery Time: Within 7 Days
• Test: as The Requests of The Customers
• Length: 6000mm or as Customzied
• Tolerance: +- 1%
• Edges: Mill Edge, Slit Edge
• Transport Package: Water Proof Paper+Metal Pallet+Angle Bar Protectio
• Specification: As Requirement
• Trademark: TISCO, POSCO, JISCO, LISCO etc.
• Origin: Wuxi China
• HS Code: 721922
• Production Capacity: 50000ton/Month

Product Description

Product Description

JIS S30400 347H Stainless Steel Round Pipe Price 316L PMI Inspection 16 Inch 20 Inch TP347H Seamless Steel Tube for Heat Exchanger and Condenser

347H Stainless Steel Pipe (S34709 / 1.4908 / TP347H) is a high-carbon, niobium-stabilized austenitic stainless steel pipe, primarily engineered for high-temperature and high-pressure applications where resistance to creep and intergranular corrosion is critical.
1. Chemical Composition (UNS S34709)

Element	C	Cr	Ni	Nb+Ta	Mn	Si	P	S
Range	0.04-0.10%	17.0-19.0%	9.0-13.0%	≥10×C%	≤2.0%	≤0.75%	≤0.045%	≤0.030%

Key Design: The higher carbon content boosts high-temperature strength, while Niobium (Nb) stabilizes the alloy by forming carbides, preventing chromium depletion and sensitization during welding or high-temperature exposure.
2. Core Properties
Mechanical Properties (Room Temp):
Tensile Strength: ≥ 515 MPa
Yield Strength: ≥ 205 MPa
Elongation: ≥ 40%
High-Temperature Performance:
Max Continuous Service Temp: 650°C (1200°F) (for pressure-retaining parts)
Oxidation Resistance: Up to 850°C (1560°F) (non-pressure parts)
Creep Strength: Significantly superior to 304H and 321H.
Corrosion Resistance:
Excellent intergranular corrosion resistance after welding (no post-weld annealing required).
Good general corrosion resistance, comparable to 321 stainless.
3. Common Specifications & Standards
ASTM/ASME: A213 (Boiler/Superheater), A312 (Welded/Seamless), A249, A358
EN/DIN: 1.4908, EN 10216-5, EN 10217-7
GB: 07Cr18Ni11Nb
4. Typical Applications
Power Generation: Boiler superheaters, reheaters, steam pipes.
Petrochemical: High-temperature heat exchangers, furnace tubes, cracking tubes.
Aerospace & Automotive: Exhaust systems, hot gas ducts.
Chemical Processing: Equipment operating in the sensitizing temperature range (427-816°C).
5. 347H vs. 347 (Key Difference)
347H: Higher carbon (0.04-0.10%) for superior high-temperature strength (up to 650°C).
347: Lower carbon (≤0.08%) for general corrosion-resistant applications (up to 600°C).

Product Name	Stainless steel pipe
Texture Of Material	210 202 301 304 304L 316 316L 321 309S 310S 904L 410 420 430
Thickness	0.03 - 6mm
Length	2000 mm, 2500 mm, 3000 mm, 6000 mm or as required by the customer
Surface Treatment	NO.1,2B,BA,NO.4(Satin),Hairline,8K(mirror)
Standard	AISI,ASTM,DIN,JIS,GB,JIS,SUS,EN
Application	Architecture, corrugated cardboard roof, electrical, household appliances, automobile industry, transportation packaging, machining, interior,decoration, medical
Processing Services	Uncoiling, Cutting, Punching, Welding, Bending
MOQ	1 T, please consult for details
Sample And Customize	Support
Delivery Time	15 - 25 days
Shipping Method	Sea freight,land transport,air transport,express delivery
Package	Standard packaging
Payment Method	Support advance payment
Place of Origin	Jiangsu China
Production Capacity	1000000 tons/year
Quality	Top Quality

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Quality Inspection

Packaging & Shipping

Company Profile

Development is endless and progress is endless. We will continue to carry forward the fine tradition and pioneering and innovative spirit of the Chinese people in Wuxi. Passionate, create a century-old Jinhua, a beautiful blueprint, go all out, and move forward with great strides. A bigger, more advanced and more dynamic our company quickly rose up. Looking forward to cooperating with you.

Certifications

FAQ

1.Q: How could you guarantee your products?
A:We accept and support the third-party inspection.We also could issue the warranty to customer to guarantee the quality.
 

2.Q: What are the advantages of your company ?
A4: We have many professionals, technical personnel, more competitive prices and best after-dales service than other stainless steel companies.
 

3.Q:How many coutries you already exported ?
A5: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt,Turkey, Jordan, India, etc.
 

4.Q: Can you provide sample ?
A6: Small samples in store and can provide the samples for free.
Customized samples will take about 5 - 7days.