347/347H Stainless  Steel Pipe/Tube
347/347H Stainless Steel Pipe/Tube
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347/347H Stainless Steel Pipe/Tube
Alloy 347 is a chromium nickel stainless steel which has been modified by the addition of columbium and tantalum. The main advantage of this is an excellent resistance to intergranular corrosion which is common to other austenitic stainless steels following exposure to temperatures of 800° to 1500°F. Type 347 has about the same general corrosion resistance as Type 302.
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  • INTRODUCTION
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  • FEATURE
Alloy 347 is generally used where corrosive conditions are severe, such as aircraft exhaust stacks, manifolds and ring collectors. Type 347 is also used for heavy welded assemblies which cannot be annealed after welding or where the operating conditions cause exposure within the temperature range between 800° to 1500°F.

Outer Diameter: 1mm-1500mm
Thickness: 0.1mm-50mm
Length: 1-12m
Surface: Annealed/Pickling/Polished
Shape: Round/Square/Hex
Technique: Hot Rolled/Cold Drawn

AISI/SAE

UNS

EN

W.Nr

347

S34700

X6CrNiNb18-10

1.4550

347H

S34709

X8CrNiNb16-13

1.4942

Chemical Composition Limits

Weight%

C

P

Si

Ni

Mn

S

Cr

Nb

Fe

Co

Mo

Cu

347

0.08 max

0.045 max

0.75 max

9-13

2.0 max

0.030 max

17-19

10 x C min

Bal

1.00 max
only AMS 5646

0.75 max

0.75 max

347H

0.04-0.10

0.045 max

0.75max

9-13

2.0 max

0.030 max

17-19

8 x C min

Bal

 

 

 

Material

Yield Strength (ksi)

Tensile Strength (ksi)

% Elongation

Hardness HB

347

≥205

510-740

≥40

≤230

347H

≥205

510-690

≥35

-

With plastic cap to protect both ends
Plastic bag wrapped outside pipe
Woven bag wrapped outside pipe

All our products are packed, stored, transported according to the international regulation. 

The tubes are wrapped with anti-rust paper and steel rings to prevent damage. Identification labels are tagged according to standard specification or customer's instructions. Special packing is available as per customer's requirement.

Plus, ply wooden box are available for special protection. Other kinds of packing can be offered if request.
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