Grade 347 is an austenitic steel alloy with the addition of a stabilizing element i.e. Niobium. Niobium, when added to stainless steel alloys has a strengthening effect on steels. Niobium along with chromium is a reason why the A182 Grade F347 WNRF Flange can be used for high temperature service. One of the main advantages of this alloy is its excellent resistance to intergranular corrosion after the flange has been exposed to temperatures in the chromium carbide precipitation range. The temperature in the chromium carbide precipitation falls in between the range of 800 to 1500°F. Apart from being useful in high temperature applications, the ASTM A182 F347 Flanges does not compromise its good mechanical properties such as its higher creep and stress rupture. In fact, the properties of grade UNS S34700 Slip On Flange outperform those of Alloy 304 as well as Alloy 304L.
ASTM A182 F347 Flanges
347 stainless steel Slip On Flanges
ASME SA182 F347 Blind Flanges
Hence, these flanges are considered for applications where sensitization and intergranular corrosion have been dubbed as major concerns. The alloy is suited to be used in aqueous and low temperature environments due to its ability to resist intergranular attack. Since this particular alloy grade demonstrates good resistance to polythionic acid stress related corrosion cracking, therefore the 347 Stainless Steel Flanges is a useful a material for use around reactor plants. Austenitic grade 347 is essentially a non-magnetic stainless steel alloy in the annealed condition. The alloy can only be hardened if it undergoes a cold working process. The SS 347 Blind Flange is used in the gas and chemical, oil, sector as well as the nuclear industry.
Standards | GOST Flange, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092, BS, BS4504, BS 10, EN-1092, DIN, ANSI, ASME, DIN, MSS S44, ISO70051, ANSI/ASME B16.5, ASME/ANSI B16.5/16.36/16.47A/16.47B, B16.47 Series A & B, B16.48, EN |
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Pressure Rating ANSI | Class 1500, Class 150, Class 900, Class 2500, Class 300, Class 600, |
Pressure Calculation in DIN | 10Bar, 16Bar, 25Bar, 40Bar, 6Bar, / PN16, PN64, PN40, PN25, PN10, PN6 |
JIS | 16 K, 20 K, 5K, 10 K, 40 K, 63 K, 30 K, |
UNI | 10Bar 16Bar 6Bar 25Bar 40Bar |
EN | 6Bar 25Bar 40Bar 10Bar 16Bar |
Most common Types | Threaded / Screwed / Forged / Plate |
Production technique |
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Shapes and Types we produce | Large Male-Female (LMF), Ring Type Joint (RTJ), Flat Face (FF), Small Tongue, Small Male-Female (SMF),Raised Face (RF), Large Tongue & Groove, Groove, Lap-Joint Face (LJF) |
Test | Direct-reading Spectrograph, Magnetic particle detector, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector |
Equipment | Pushing Machine, Press machine, Bending machine, Sand-blasting machine, electric bevelling machine etc |
Stainless Steel 1.4550 Weld Neck Flanges | Stainless Steel 347 Lap Joint Flanges |
347 Stainless Steel Long Weld Neck Flanges | ASME SA182 F347 Spectacle Blind Flanges |
347 SS Spades & Ring Spacers | SS A182 F347 Nipoflange |
UNS S34700 5D Weldoflange | Stainless Steel 1.4550 Flange Outlet |
ASTM A182 F347 Flange | SS A182 F347 Blind Flange |
ASTM A182 F347 Forged Flanges | 347 Stainless Steel Plate Flange |
ASTM A182 F347 Flanges | 347 Stainless Steel BS 10 Flanges |
347 SS BS 4504 Flanges | UNS S34700 EN 1092-1 Flanges |
Stainless Steel 1.4550 SORF Flange | ASME SA182 F347 BLRF Flange |
SS A182 F347 WNRF Flange | ASTM A182 F347 Series a Lap Joint Ring Flange |
ASME SA182 F347 Slip on Flange | UNS S34700 Threaded Flange |
347 SS Reducing Flange | 347 Stainless Steel Socket Weld Flange |
347 Stainless Steel PN16 blind flange | 347 SS Forged Socket Weld Pipe Flange |
ASME SA182 F347 Class 300 slip on flange | Stainless Steel 1.4550 Slip On Weld Flange |
Stainless Steel 347 Tongue and Groove Flanges | ASME SA182 F347 Male and Female Flange |
Stainless Steel 1.4550 Reducing Flanges | SS A182 F347 ASME B16.5 Flanges |
ASTM A182 F347 SWRF Flange | Stainless Steel 347 Forged blind flange |
ASME SA182 F347 groove weld neck flange | 347 Stainless Steel Socket Weld Hub Flange |
UNS S34700 Forged steel slip on flanges | SS A182 F347 Race face slip on flange |
UNS S34700 Ring Type Joint Flanges | 347 SS Raised Face Flanges |
347 SS threaded lap joint flange | SS A182 F347 Slip On Integral flange |
Stainless Steel 347 Forged integral puddle flange | UNS S34700 table e long weld neck |
ASME SA182 F347 Class 150 LBS Flange | Stainless Steel 347 PN10 Forged Flanges |
Fitting Schedule/Class | Flange Size | Fitting Connection Type | Pipe Fitting Material | Max. Pressure | Price |
Class 150 | 1/2″ | FNPT | 347 Stainless Steel | 150 psi | $27.39 / each |
Class 150 | 1/2″ | Socket Weld | Forged 347 Stainless Steel | 275 psi | $31.86 / each |
Class 150 | 1/2″ | Welded | 347 Stainless Steel | 150 psi | $12.43 / each |
Class 150 | 3/4″ | FNPT | 347 Stainless Steel | 150 psi | $27.39 / each |
Class 150 | 3/4″ | Socket Weld | Forged 347 Stainless Steel | 275 psi | $35.88 / each |
Class 150 | 3/4″ | Welded | 347 Stainless Steel | 150 psi | $15.34 / each |
Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
347 | 515 | 205 | 40 | 95 | 201 |
STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
SS 347 | 1.4550 | S34700 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
Standard | Class | Diameter | Bolt Circle Diameter | Number of Bolts | Bolt Size | Diameter of Bolt Hole |
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AS4087 | PN14 | 95 | 67 | 4 | M12 | 14 |
AS 2129 Flange | Table C | 95 | 67 | 4 | 13 | 14 |
Table D | 95 | 67 | 4 | 13 | 14 | |
Table E | 95 | 67 | 4 | 13 | 14 | |
Table F | 95 | 67 | 4 | 13 | 14 | |
Table H | 114 | 83 | 4 | 16 | 17 | |
Table J | 114 | 83 | 4 | 16 | 17 | |
ANSI B16.5 | ANSI 150 | 89 | 60 | 4 | 13 | 16 |
ANSI 300 | 95 | 67 | 4 | 13 | 16 | |
ANSI 600 | 95 | 67 | 4 | 13 | 16 | |
ANSI 900 | 121 | 83 | 4 | 19 | 22 | |
ANSI 1500 | 121 | 83 | 4 | 19 | 22 | |
ISO 7005 (DIN) Flange | PN6 | 80 | 55 | 4 | M10 | 11 |
PN10 | 95 | 65 | 4 | M12 | 14 | |
PN16 | 95 | 65 | 4 | M12 | 14 | |
PN20 | 90 | 60.5 | 4 | M14 | 16 | |
PN25 | 95 | 65 | 4 | M12 | 14 | |
PN40 | 95 | 65 | 4 | M12 | 14 |