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Stainless Steel, Nickel Alloys, Alloy 20, Duplex 2205® and Super Duplex 2507®.

Pipe, Tubing, Fittings, Flanges, Bar, Plate and
Continuous Coil Tubing
 
We now offer Metric Tubing in Stainless Steel
 
We offer Tube Fittings by Hoke-Gyrolok®, Parker® and Swagelok®.

 

 

 
 
 
 
   
 
 
 
 
 
 
 
347/347H Stainless Steel

UNS S34700


Grade 347 is an austenitic stainless steel made of .08% maximum carbon, 17% to 19% chromium, 2% maximum manganese, 9% to 13% nickel, 1% maximum silicon, traces of phosphorus and sulfur, 1% minimum to 10% maximum columbium and tantalum with the balance of iron. Grade 347 is advantageous for high temperature service because of its mechanical properties; it also has excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800° to 1500° F. It is similar to Grade 321 with respect to intergranular corrosion which is achieved through the use of columbium as a stabilizing element to maximize this feature. Grade 347 can not be hardened through heat treating, but elevated properties may be obtained through cold reduction.

Available from Inventory

Pipe – Seamless and Welded

Tubing – Seamless and Welded

Fittings – Butt Weld, Socket Weld

Flanges

½” Thru 12”

Schedules 10s, 40s, 80s and 160

Pressure Fittings - Threaded

1/4” Thru 2”

150#, 300#, 3000# and 6000#

Bar- Round, Flat and Hex

Plate and Sheet

Specifications

Pipe – ASTM/ASME A/SA312, ASTM/ASME A/SA 358

Tube- ASTM A213, A249, A269, A270, A511

Butt-Weld Fittings – ASTM A-403 WPW, WPX, WPS

Flanges – ASTM A182 Pressure Fittings - A/SA182

Chemical Composition %

C

Co

Cr

Mn

Ni

P

S

Si

Ta

Max

Max

Max

Max

Max

0.08

Trace*

17.0-20.0

2.0

9.0-13.0

0.04

0.30

0.75

Trace*

All in formation above in not guaranteed and not for design purposes.