Heat Resistant Steel Pipe

ASTM A312 347/347H Stainless Steel Pipe

ASTM A312 347/347H Stainless Steel Pipe
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Product Details

347 is a type of stabilized Austenitic stainless steel with Niobium and 347H is its high carbon version. 347 can be the version with the addition of Niobium and Tantalum based on the 304 stainless steel. Niobium-tantalum can refine grain, resist intergranular corrosion and promote aging hardening. 347 should be used where requiring intermittent heating between 800ºF (427ºC) and 1650ºF (899ºC) or for welding under conditions which prevent a post-weld anneal. 

 

Relevant standards: ASTM A312/A358

Size: 1/2“NB - 16”NB(seamless);1/2“NB - 24”NB (welded)

Length: 5.8 or random

Shape: round pipe, rectangle pipe, square pipe


Equivalent materials

China  

American  

Japanese  

German  

06Cr18Ni11Nb

Grade   347

SUS   347

X6CrNiNb18-10, 1.4550

07Cr18Ni11Nb

Grade   347H

/

X7CrNiNb18-10, 1.4912


347/347H Chemical Composition

Material

C

Mn

Si

Cr

Ni

P

S

Nb

347

≤0.08

≤2.00

≤0.75

17.0~19.0

9.0~13.0

≤0.045

≤0.03

10C~1.00

347H

0.04~0.10

≤2.00

≤0.75

17.0~19.0

9.0~13.0

≤0.045

≤0.03

8C~1.00

 

347/347H Physical 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

 

Applications

The high-temperature performance of 347&347H stainless steel tubes are superior than 304 and 321. They have been widely used in the field of aviation, petrochemical, food, papermaking and other industries, such as exhaust manifold and branch pipe of aero-engine, hot gas pipe of turbo-compressor, and parts working under small load and temperature less than 850℃. 


We supply and manufacture high quality 347&347H Heat resistant stainless steel pipes in accordance with EN, DIN, ASTM, GB standards, specified delivery conditions and final customer specifications for industrial and commercial applications. Special sizes of steel pipes and delivery issues can be further negotiated and we provide a wide range of solutions for purchasing departments to select alternative grades without specifying product specifications.

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