Stainless Steel Pipes ASTM A347/347H
347H stainless steel pipe is a high carbon austenitic stainless steel pipe, with an excellent heat-resistance material which is applied to boiler, heat exchanger, car and aircraft exhaust, chemical equipment etc. As a higher grade from AISI 321H, the intergranular corrosion of 347H is achieved through the use of niobium (Nb) as a stabilizing element to maximize this feature. SS 347 has a good mechanical properties welding performance, excellent resistance to intergranular corrosion .
ASTM A312, ASTM A269, ASTM A213, ASTM A249, ASTM A358, EN10216-5, EN10217-7, DIN 17456, DIN 17455, GOST 9941, JIS G3459, JIS G3463 etc.
Manufacturing and Supplying Capacity:
| Product: | Stainless Steel Pipes and tubes |
| Grade | 347, 347H, 1.4550 |
| Dimension: | 1/2” ~ 24” for smls, 6” ~ 104” for EFW pipe |
| Schedule: | SCH10S, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type: | Seamless / Welded |
| Manufacturing Craft | Cold Drawn,Cold Rolled (ERW/EFW for welded) |
| Pipe End | Plain End, Beveled End, Treaded |
| Delivery Conditions | Solution Annealing, Bright Annealing |
Description
Features of 347/347H Stainless Steel Pipe
- Excellent resistance for high temperature
- Similar resistance and corrosion protection as Alloy 321
- Used for heavy welded equipment when annealing is not possible
- Good oxidation resistance, on par with most other austenitic stainless steels
- Higher carbon allows for better high temperature creep properties
Material Comparision of Stainless Steel 347 of ASTM –EN –JIS -China
|
China – GB |
Japan |
USA |
KS |
EN/DIN |
AS |
CNS |
DIN |
||
|
Grade |
New(GB24511) |
JIS |
ASTM |
UNS |
Grade |
||||
|
S34700 |
06Cr18Ni11Nb |
SUS347 |
347 |
S34700 |
STS347 |
1.4550 |
347 |
347 |
X6CrNiNb18-10 |
|
S34709 |
07Cr18Ni11Nb |
SUS347HTB |
347H |
S34709 |
STS347H |
|
|
|
|
Application
347H stainless steel pipe is mainly used where corrosion resistance and sustained operations at temperatures between 800°F and 1500°F (427°C ~ 816°C) is of the utmost importance. It is also a superior grade for use on heavy welded objects, which cannot be re-annealed.
- Chemical production equipment
- Boiler and heat exchanger
- Oil and gas refinery piping
- Radiant superheaters
- High pressure steam pipes
- Heavy wall-welded equipment
- Aircraft exhaust stacks
- Car manufacturing
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