347H Pipes
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We could produce 347H pipes,347 H pipes,347H seamless pipes,347H welded pipes,347H boiler pipes, 347H heat exchanger pipes,347H Capillary pipes,347 H Thermocouple pipes,347H Superheater pipes and reheater pipes,347H condenser pipe,347H finned pipes,347 H furnace pipes,347H instrumentation pipes,347H Evaporator pipes,347H honed pipes,347 H coiled pipes,347H Precision pipes,347H High pressure pipes,347H hydraulic pipes from china

The outer diameter of 347H pipes that we could do is from 0.4MM to 850MM,The thickness of 347H that we could do is from 0.12MM to 100MM

As per surface finish of 347 H pipes, we could do pickled and polish into bright surface as per the requirement of the clients, also for bright surface of 347H pipes, we could meet 2D finish.No. 4 Finish,No. 6 Finish,No. 7 Finish as per the requirement of the clients

347H is a stabilized, austenitic, chromium steel

The chemical composition of 347H pipes is as follows


Content (%)

Iron, Fe

62.83 - 73.64

Chromium, Cr

17 - 20

Nickel, Ni

9 - 13

Manganese, Mn


Silicon, Si


Niobium, Nb (Columbium, Cb)

0.320 - 1

Carbon, C

0.04 - 0.10

Phosphorous, P


Sulfur, S


The mechanical propery of 347 H seamless pipes is as follows


Tensile Strength (MPa) min

Yield Strength 0.2% ksi  offset (MPa) min

Elongation (% in 50mm)  min

Hardness (Brinell) MAX

Hardness (Rockwell B) MAX







As per heat treatment of 347H pipes, we could do solution treatment, annealed treatment as per the requirement of the clients

As per material of 347H pipes, our raw material has been melted by  EAF+VOD-ESR methods

We produce 347H seamless pipes and weled pipes as per the standard of ASTM B729 and ASTM B464

In order to control the quality of 347 H seamless pipes and weled pipes, we will do Positive material identification (PMI),Visual inspection,Dimensional inspection.Laser micrometer inspection,Destructive testing( includes tensile, hardness, bending, flattening, flare and metallurgical tests),ultrasonic testing and pressure testing,Liquid Penetrate testing as per the requirement of the clients

Our 347H pipes are packed wooden crates lined with wax craft paper, tri-wall clay-coated reinforced cases

Our 347H seamless pipe and weled pipes are widely used in many industry :Valves,Oil Refineries,Petrochemical,Heat Exchangers & Pressure Vessels,Oil & Gas,Pumps.Mining.Paper Mills,Lock & Dam.Agricultural Equipment.Chemical Processing.Metal Fabrication,Marine,Oil Tools & Production,Food and so on

We could supply 347H pipe material certificate as per En10204-3.1 or EN10204-3.2 by third parts(like TUV,DNV,GL,and so on)

Please send us the size and quantity of 347H pipes that you need, we are glad to quote the best price for your side

Except 347H pipes,we also could produce 347H flanges,347H plates,347H fasteners,347H bolts,347H pipe fittings,347H bars,347H tubes,347H springs