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JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect.
GB13296-1991 GB14975-2002 GB14976-2002,ect.
Size:
ND5 - DN400
Length:
6m length or cutting any length as request
Applications:
fluid and gas transport, structure , boiler, heat exchanger, super heater
347H stainless steel pipe is a high-performance alloy known for its excellent corrosion resistance and high-temperature strength, making it a go-to choice in demanding industrial environments. Its unique composition, particularly the addition of niobium, sets it apart, ensuring stability even under extreme conditions.
347H Stainless Steel Pipe: Key Characteristics
347H is an austenitic stainless steel, part of the 300 series, with a chemical composition that includes chromium (17-19%), nickel (9-13%), and niobium (columbium, 5x the carbon content minimum) as key alloying elements. This combination grants it superior resistance to intergranular corrosion, especially after exposure to high temperatures, which is critical in applications like boilers and heat exchangers. The "H" designation indicates a higher carbon content (0.04-0.10%), enhancing its strength at elevated temperatures compared to standard 347.
Typical Applications Thanks to its ability to withstand temperatures up to 1500°F (816°C) and resist oxidation and carbide precipitation, 347H pipe is widely used in:
Power generation (boiler tubes, superheaters)
Chemical processing (reactors, pipelines handling corrosive fluids)
Petrochemical industry (refinery equipment)
High-temperature exhaust systems
Mechanical Properties
Property
Value
Tensile Strength
75,000 psi (min)
Yield Strength
30,000 psi (min)
Elongation
40% (min in 2")
Hardness
95 HRB (max)
Advantages Over Similar Alloys Compared to 304 or 316 stainless steel, 347H offers better high-temperature stability and reduced risk of sensitization (carbide formation at grain boundaries), which is crucial for welded components in corrosive environments. It outperforms 321 in higher temperature ranges, making it a preferred choice for extreme heat applications.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification:
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...