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Grade T347
Similarto T-321, Type 347 is also an austenitic chrome-nickel steel that has been stabilized with columbium and tantalum. This grade is also recommended for parts which are welded, but cannot be annealed.
TYPICAL APPLICATIONS
Airplane exhaust stacks, chemical tank cars, expansion joints jet engine parts.
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TYPICAL ANALYSIS |
347 |
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Chrome |
17.00-19.00 |
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Nickel |
9.00-12.00 |
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Carbon |
.08 MAX. |
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Manganese |
2.00 MAX. |
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Silicon |
1.00 MAX. |
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Molybdenum |
|
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Columbium and/or Tantalum |
10xCMIN. |
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MECHANICAL PROPERTIES (ANNEALED)
BRINELL HARDNESS |
170 |
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TENSILE—KSI |
90 |
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YIELD—KSI |
35 |
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ELONGATION IN 2-% |
50 |
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RED. IN AREA-% MIN |
65 |
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WELDING
CHARACTERISTICS |
Very good - tough welds |
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MACHINING
COMPARED TO B1112
SCREW STOCK |
45% |
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SPECIFICATIONS
AISI |
347 |
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ASTM |
A276, A479 |
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AMS |
5646 |
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QQS |
763 |
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