347H Stainless Steel Pipe

1. Standard: ASTM A312 / ASME SA312、ASTM A213/ASME SA213、ASTM A269/ASME SA269
2. Size: 1/2“NB - 16”NB(seamless);1/2“NB - 48”NB (welded)
3. Thickness: 0.5mm-30mm
4. Length: Single, Double Random & Cut Length
5. Grades: Alloy 347h, UNS S34709, WNR.1.4961

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Product Introduction

347H stainless steel pipe is an austenitic stainless steel, including SS 347H seamless pipe, 347H stainless steel welded pipe. A312 347H pipe has a higher carbon content than 347, and has excellent resistance to high temperature oxidation. It is used where intermittent heating between 800ºF (427ºC) and 1650ºF (899ºC) is required. In addition, niobium is added to ASTM A312 GR TP347H material, and niobium and tantalum can refine the grains, giving it excellent resistance to intergranular corrosion.

Alloy 347H Tubing Standard：

ASTM A312: Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

ASTM A269: Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service

ASTM A213: Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes

ASTM A312 TP347H Stainless Steel Seamless Pipes Size

Sizes	6NB - 1200NB
Outside Diameter	1/8" - 12" NPS
Thickness	0.6 - 12.7 mm
Length	Single, Double Random & Cut Length

ASTM A312 TP347H Stainless Steel Welded Pipes Size

Sizes	1/8" - 36" NB, 1/4" - 36" OD
Outside Diameter	6.35 - 114.3 mm
Thickness	0.8 - 12.7 mm
Length	up to 26 Meters

ASME SA312 UNS S34709 Pipes Specifications

ASTM / ASME Specification	ASTM A312 / ASTM SA 312
Dimensional Standards	ANSI/ASME B36.19M, ANSI/ASME B36.10M
Different Types and Shapes	Hydraulic, Square, Hex, Honed, Round, Rectangle
Most Common types	100% X Ray Welded, Seamless, CDW, Fabricated, ERW, Welded
Pipe End Types	Plain End, Beveled End, Treaded Pipe
Technical Conditions of The Pipe	Cold Drawn, Bright Annealed, Annealed and Pickled, Polished
Mechanical Surface Finishing	2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements
Wall Thickness Schedule Chart	SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Chemical Composition of Stainless Steel 347H Pipe

Material	C	Mn	Si	Cr	Ni	P	S	Nb
347H	0.04~0.10	≤2.00	≤0.75	17.0~19.0	9.0~13.0	≤0.045	≤0.03	8C~1.00

DIN 1.4961 Stainless Steel Pipes Mechanical Properties

Yield Strength, 0.2% Offset MPa	Ultimate Tensile Strength, MPa	Elongation in 2 in. or 51 mm	Hardness, Max, Brinell
205	515	40.0	217

347H Stainless Steel Pipe Application

Oil and gas extraction: wellhead equipment, pipelines, oil well casing, oil pumps and compressors, etc.
Heat exchangers and heaters Heat exchangers and heaters.
Food and pharmaceutical industries: reactors, storage tanks and processing equipment.
Boilers
Automobile and aircraft exhaust
Chemical equipment