ASTM A312 TP347H Stainless Steel Seamless Pipe for High-Temperature Industry

ASTM A312 TP347H stainless steel pipe is a niobium-stabilized austenitic stainless steel pipe, designed for high-temperature corrosion environments due to its excellent creep resistance and intergranular corrosion resistance.

The ASTM A312 TP347H stainless steel pipes supplied by GNEE are primarily used in high-temperature and high-pressure equipment in industries such as petrochemical and power generation, including boiler superheater tubes, reheater tubes, steam pipelines, and heat exchangers in chemical plants. Its high-temperature stability and corrosion resistance help prevent issues like chloride stress corrosion cracking during chemical production processes. Even at temperatures up to 800°C (1472°F), TP347H maintains excellent mechanical properties along with outstanding oxidation and scaling resistance.

Stainless Steel 347 Pipe Specification


Specifications	:	ASTM A 312 / ASME SA 312
Dimensions	:	ASTM, ASME and API
SS 347H Pipes	:	1/2″ NB – 16″ NB
ERW 347H Pipes	:	1/2″ NB – 24″ NB
EFW 347H Pipes	:	6″ NB – 100″ NB
Size	:	1/8″NB TO 30″NB IN
Specialized in	:	Large Diameter Size
Schedule	:	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type	:	Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form	:	Round, Square, Rectangular, Hydraulic Etc
Length	:	Single Random, Double Random & Cut Length.
End	:	Plain End, Beveled End, Treaded

SS 347H Welded Pipe Chemical Compostions

Grade		Phosphorous	Manganese	Carbon	Silicon	Nickel	Molybdenum	Sulphur	Chromium
SS 347 Pipe	Minimum					9.0	2.00		17.0
SS 347 Pipe	Maximum	0.045	2.0	0.08	1.00	13.0	3.00	0.030	20.0

Stainless Steel 1.4961 Tubing Mechanical Properties

Grade	Yield Strength	Elongation	Tensile Strength	Hardness
				Rockwell B (HR B)	Brinell (HB)
SS 347 Pipe	205	40	515	95	201

If you have a project need for 347 stainless steel tubing, we welcome your order. GNEE has a large inventory of popular products for you to choose from. Available in both seamless and welded configurations, contact our factory today for detailed chemical composition and free samples. We offer competitive pricing and excellent service.

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Testing and Inspection

Forgings conforming to ASTM standards undergo a variety of tests and inspections, including thermal analysis, tensile testing, hardness testing, hydrostatic testing, magnetic particle inspection, liquid penetrant testing, macroetch testing, and Charpy impact testing.

Highest quality packaging and shipping

The package is packed with waterproof paper and steel strapping, which meets the standard export sea freight packaging requirements and is suitable for various modes of transportation or can be customized according to customer requirements.