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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.
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.