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347 Stainless Steel Sheet, Coil (AMS 5512) & Plate (UNS S34700)

347 ANN Coil
347 ANN Sheet
Available Thicknesses in Inches
.113 - .130
.083 - .098
.070 - .083
.056 - .066
.045 - .052
.037 - .045
.029 - .033
.022 - .026
.018 - .022
Available Thicknesses in Millimeters
2.870 - 3.302
2.108 - 2.489
1.778 - 2.108
1.422 - 1.676
1.143 - 1.321
0.940 - 1.143
0.737 - 0.838
0.559 - 0.660
0.457 - 0.559

347 stainless steel has a high resistance to prolonged heat and corrosion making it well suited for engine, power generation, welded fabrications and other high heat applications. 347 stainless steel offers good mechanical properties with higher creep and stress rupture characteristics than other grades, such as 304. 347 stainless steel is also advantageous in applications that require omission of the annealing process after welding.

All of our 347 stainless steel sheet and stainless steel coil is ordered to specific decimal thicknesses.

347 Stainless Steel Sheet Specifications

United Performance Metals can suppy 347 stainless steel sheet in widths of 48" down to .250" and standard lengths of 96" and 120" but are capable of shearing and leveling to your required lengths and widths.

347 stainless steel coil can also be slit to your desired width.

United Performance Metals 347 stainless steel sheet and stainless steel coil is supplied to AMS 5512.  

United Performance Metals supplies 347 stainless steel plate in a variety of thicknesses up to 1".  347 stainless steel plate is supplied to UNS S34700.

 

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Stainless Steels Chromium-Nickel-Molybdenum

Types 321 (S32100), 347 (S34700)

347 Stainless Steel General Properties

Types 321 (S32100) and 347 (S34700) are stabilized stainless steels which offer as their main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). Type 321 is stabilized against chromium carbide formation by the addition of titanium. Type 347 is stabilized by the addition of columbium and tantalum.

While Types 321 and 347 continue to be employed for prolonged service in the 800 to 1500°F (427 to 816°C) temperature range, Type 304L has supplanted these stabilized grades for applications involving only welding or short time heating.

Types 321 and 347 stainless steels are also advantageous for high temperature service because of their good mechanical properties. Types 321 and 347 stainless steels offer higher creep and stress rupture properties than Type 304 and, particularly, Type 304L which might also be considered for exposures where sensitization and intergranular corrosion are concerns. This results in higher elevated temperature allowable stresses for these stabilized alloys for ASME Boiler and Pressure Vessel Code applications. The Types 321 and 347 alloys have maximum use temperatures of 1500°F (816°C) for code applications like Type 304, whereas T304L is limited to 800°F (426°C).

347 Stainless Steel Applications

Applications for Types 321 and 347 include those for welded construction and parts subjected to heating in the carbide precipitation range, aircraft collector rings, aircraft exhaust stacks, boiler casings, cabin heaters, carburetor air intensifier tubes, exhaust manifolds, fasteners, fire walls, flash boilers, flexible couplings, furnace heating elements, jet engine parts, large mufflers for stationary diesel engines, pressure vessels, stack liners, all-welded tank car for carrying chemicals, annealing box inner covers, collector rings, expansion joints, heat resistors, heavy wall welded equipment, welded tanks for storing organic chemicals, wire cloth and screens (industrial).

347 SS Technical Data Sheet

Stainless Steels Chromium-Nickel-Molybdenum - Types 321 (S32100), 347 (S34700)

Chemical Composition (Represented by ASTM A240 and ASME SA-240)

Element Maximum Unless Range is Specified
321 347
Carbon 0.08 0.08
Manganese 2.00 2.00
Phosphorus 0.045 0.045
Sulfur 0.030 0.030
Silicon 0.75 0.75
Chromium 17.00-19.00 17.00-19.00
Nickel 9.00-12.00 9.00-13.00
Columbium+Tantalum - 10xC min to 1.00 max
Titanium 5x(C+N) min to 0.70 max -
Nitrogen 0.10 -
Iron Balance Balance

Resistance to General Corrosion

Types 321 and 347 alloys offer similar resistance to general, overall corrosion as the unstabilized chromium nickel Type 304. Heating for long periods of time in the chromium carbide precipitation range may affect the general resistance of Types 321 and 347 in severe corrosive media.

Stainless Steels Chromium-Nickel-Molybdenum - Types 321 (S32100), 347 (S34700)

Typical Physical Properties
Grade Density Modulus of Elasticity in Tension Melting Range
g/cm3 lb/in3
321 7.92 0.286 28 x 106 psi
193 GPa
1398-1446°C
2550-2635°F
347 7.96 0.288 28 x 106 psi
193 GPa
1398-1446°C
2550-2635°F
Mean Coefficient of Linear Thermal Expansion
Temperature Range Coefficients
°C °F cm/cm/°C in/in/°F
20-100 68-212 16.6 x 10-6 9.2 x 10-6
20-600 68-912 18.9 x 10-6 10.5 x 10-6
20-1000 68-1832 20.5 x 10-6 11.4 x 10-6
Thermal Conductivity
Temperature Range W/m·K Btu · in / hr · ft2 · °F
°C °F
20-100 68-212 16.3 112.5
20-500 68-932 21.4 147.7

 

Specific Heat

Temperature Range J/kg K Btu/lb · °F
°C °F
0-100 32-212 500 0.12

Magnetic Permeability

  • H/m Annealed
  • 1.02 Max
Electrical Resistivity
Temperature Range microhm·cm
°C °F
20 68 72
100 213 78
200 392 86
400 752 100
600 1112 111
800 1472 121
900 1652 126

Stainless Steels Chromium-Nickel-Molybdenum 0 Types 321 (S32100), 347 (S34700)

Room Temperature Tensile Properties

Minimum mechanical properties of the stabilized Types 321 and 347 chromium-nickel grades in the annealed condition (2000°F[1093°C], air cooled) are shown below.

Minimum Room Temperature Mechanical Properties Per, ASTM A240 and ASME SA-240
Property Type 321 Type 347
Yield Strength, 0.2% Offset
psi
MPa
30,000
205
30,000
205
Ultimate Tensile Strength,
psi
MPa
75,000
515
75,000
515
Percent Elongation in 2 in. or 51 mm 40.0 40.0
Hardness, Max.,
Brinell (Plate)
RB (Sheet & Strip)
217
95
201
92