Alloy 347 is a stabilized, austenitic, chromium steel containing columbium which allows for the elimination of carbide precipitation, and, consequently, intergranualr corrosion. Alloy 347 is stabilized by the additions of chromium and tantalum and offers higher creep and stress rupture properties than alloy 304 and 304L which may also be used for exposures where sensitization and intergranualr corrosion are of concern. The addition of columbium also allows Alloy 347 to have excellent corrosion resistance, even superior to that of alloy 321. 347H is the higher carbon composition form of Alloy 347 and demonstrates improved high temperature and creep properties.
Specifications: UNS S34700 / S34709
Alloy 347 is frequently used for the fabrication of equipment, which must be placed in service under severe corrosive conditions, and is also common to the petroleum refining industries. Applications that consistently used Alloy 347 include:
High temperature chemical processes
Heat exchanger tubes
High temperature steam service
High pressure steam pipes
Radiant superheaters
Boiler tubes
Heavy duty exhaust systems
General refinery piping
The process flow of the Stainless Steel Square Bar production line: billet acceptance → heating → rolling → double scale cutting → cooling → cutting → inspection → packaging → measurement → warehousing.
Grade | SS 347/347H |
---|---|
Mn | 2 max |
Cb | 10xC – 1.10 |
Si | 1.0 max |
P | 0.045 max |
S | 0.030 max |
Fe | 62.74 min |
C | 0.08 max |
Cr | 17 – 20 |
Ni | 9 – 13 |
Density | 8.0 g/cm3 |
Tensile Strength | Psi – 75000 , MPa – 515 |
Yield Strength (0.2%Offset) | Psi – 30000 , MPa – 205 |
Melting Point | 1454 °C (2650 °F) |
Elongation | 35 % |
Standard | ASTM A479,ASTM A276,ASTM A484, ASTM A582, ASME SA276, ASME SA484, GB/T1220, GB4226, etc. | ||
Material | 301, 304, 304L, 309S, 321, 316, 316L, 317, 317L, 310S, 201,202 321, 329, 347, 347H 201, 202, 410, 420, 430, S20100, S20200, S30100, S30400, S30403, S30908, S31008, S31600, S31635, etc. | ||
Specifications | Round bar | Diameter:0.1~500mm | |
Hexagonal bar | Size: 2mm~100mm | ||
Flat bar | Thickness | 0.3~200mm | |
Width | 1~2500mm | ||
Square bar | Size: 1mm*1mm~800mm*800mm | ||
Length | 2m, 5.8m, 6m, or as required. | ||
Surface | Black, peeled, polishing, bright, sand blast, hair line, etc. | ||
Price Term | Ex-work, FOB, CFR, CIF, etc. | ||
Export to | Singapore, Canada, Indonesia, Korea, USA, UK, Thailand, Peru, Saudi Arabia, Viet Nam,India, Ukraine, Brazil, South Africa, etc. | ||
Delivery Time | Standard size is in stock,prompt delivery or as order's quantity. | ||
Package | Export standard package, bundled or be required. The inner size of container is below: 20ft GP: 5.9m(length) x 2.13m(width) x 2.18m(high)about 24-26CBM 40ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high) about 54CBM 40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high) about 68CBM |
316L Stainless Steel Square Bar | 347 Stainless Steel Square Bar |
317 Stainless Steel Square Bar | 347H Stainless Steel Square Bar |
317L Stainless Steel Square Bar | 410 Stainless Steel Square Bar |
201 Stainless Steel Square Bar | 420 Stainless Steel Square Bar |
202 Stainless Steel Square Bar | 430 Stainless Steel Square Bar |
329 Stainless Steel Square Bar | S20100 Stainless Steel Square Bar |
Stainless Steel Square Bar are mainly used in chemical, petrochemical, marine engineering, seawater pipelines, seawater desalination and other industries, nuclear engineering, paper and pulp industry
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