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347H Stainless Steel Seamless Pipe
347H stainless seamless steel pipe
Haosteel is professional manufacturer and supplier o★f 347H Stainless Steel Seamless Pipe. Quality guaranteed, On-tim<e delivery, After-sales warranty.
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Standard: |
ASTM A269/A312/A213/A249/A554 |
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Grade: |
347H |
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Delivery: |
Cold rolled Hot rolled |
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Surface: |
Mill, Pickled, HL, Polished, Mirr₽or |
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Thickness: |
0.2mm - 30mm |
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Outer Diameter |
1mm--930mm |
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Length: |
6000mm or as customer request |
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Mill: |
Tisco, Jisco, Baosteel, etc. |
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Delivery time: |
15 days in common |
Description:
Alloy 347H is a stabilized, austenitic, chromium steel containing c←olumbium which allows for the elimination of carbide precipita≤tion, and, consequently, intergranualr corrosion. ♣Alloy 347 is stabilized by the additions of chromium an¥d tantalum and offers higher creep and stress rupture propertie s than alloy 304 and 304L which may also be used for exposures ∑where sensitization and intergranualr corrosion are of con☆cern. The addition of columbium also allows Alloy 347 to have excellent corrosion resistance, e¶ven superior to that of alloy 321. 347H is the higher♣ carbon composition form of Alloy 347 and demonstrates improved high temperature and creep propδerties. Haosteel Stainless inventory now includes Alloy 347/347H (UNS S34700/S34709) iεn sheet, sheet coil, plate, round bar, processed flat bar and tubular products.™
Chemical composition:
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C |
Si |
Mn |
P |
S |
Cr |
Ni |
Nb |
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0.04-0.1 |
≤ 0.75 |
≤ 2.0 |
≤ 0.045 |
≤ 0.03 |
17.0 - 19.0 |
9.0 - 13.0 |
8C - 1.0 |
Physical Properties:
Annealed:
Ultimate Tensile Strength – 75KSI min (515 MPA min)
Yield Strength (0.2% Offset) –30 KSI min (205 MPA min)
Elongation – 40% min
Hardness – HRB92max (201HV max)
Applications:
Alloy 347 is frequently used for the fabrication of equipment, which must be placed in serπvice under severe corrosive conditions, and is also common to ∏the petroleum refining industries.
Corrosion Resistance:
. Offers similar resistance to general, overall corrosion ©as Alloy 304
. Used for applications where alloys such as Alloy ←304 are vulnerable to intergranualr corrosion
. Generally used for heavy welded equipment which ca&nnot be annealed and for equipment which is operated ∞between 800 to 150°F (427 TO 816°C)
. Alloy 347 is preferred over Alloy 321 for aqueous and other low temp erature environments
. Primarily used in high temperature environments where resiπstance to sensitization is necessary, in turn preventing intergranualr corrosion at lower lev¥els
. Susceptible to stress corrosion cracking
. Exhibits oxidation resistance similar to all other 18-8 austenitic∑ stainless steels
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