347/347H Stainless Steel Pipe

347 / 347H Stainless Steel Pipes

347 / 347H Stainless Steel Pipe

347 / 347H Stainless Steel Pipes

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 .

Kaysuns provide dual grade of 347/347H stainless steel pipe and fittings with the exellent quality and fast delivery. Our stainless steel piping can be inspected by third party inspection, classication of DNV, BV, ABS, KR etc. are available for welded pipes.

 

Stainless Steel 347H Chemical Composition to ASTM A312, ASTM A269, ASTM A213

Grade

C

Mn

P

S

Si

Ni

Cr

Nb

Weight %

347

9.00

17.00

10C

Min.

0.08

2.00

0.045

0.030

1.00

13.00

19.00

1.00

Max.

347H

0.04

11.00

18.00

8C

Min.

0.10

2.00

0.045

0.03

1.00

15.00

20.00

1.00

Max.

347 / 347H Stainless Steel Pipe

347H Stainless Steel Mechanical Properties ASTM A312, ASTM A269, ASTM A213

Grade

Tensile Strength, Min. Mpa

Yield Strength, Min. Mpa

Longitudinal

347

515

205

35

347H

515

205

35

Available Manfaucturing Standard for 347/347H Stainless Steel Pipe

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
Manfaucturing Craft Cold Drawn,Cold Rolled (ERW/EFW for welded)
Pipe End Plain End, Beveled End, Treaded
Delivery Condtions Solution Annealing, Bright Annealing

 

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

 

Stainless Steel Piping Dimensions to ASME B36.19/B36.10

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