ASTM A240 Grade 347 Stainless Steel Chemical/Physical/Mechanical Properties

Posted:2016-11-30 00:13:42

Type 347 is a stabilized austenitic stainless steel similar to type 304 with an addition of Columbium and Tantalum. Alloy 347 stainless steel plate can be easily welded and processed by standard shop fabrication practices.

Grade 347 Stainless Steel Common Applications

Aircraft collector rings, Aircraft exhaust stacks, Boiler casings, Cabin heaters, Furnace heating elements, Heavy wall welded equipment

Composition of ASTM A240

Carbon		.08 Max
Manganese		2.00 Max
Phosphorus		.045 Max
Sulfur		.030 Max
Silicon		.75 Max
Chromium		17.00 - 19.00
Nickel		9.00 - 13.00
Nitrogen		.10 Max
Molybdenum
Mechanical Properties(Annealed, Per ASTM A240)
UTS	75 ksi Min
Elongation % in 2"	40.00 Min
Rockwell Hardness	RB95.00 Max

Features of ASTM A240 Grade 347

1, Good creep strength up to 1500°F
2, Maintains good corrosion resistance in applications where the temperature is between 800°F and 1500°F.
3, Good resistance to corrosion in the as welded condition.

Standard Inventory Specifications

UNS S34700
AMS 5512
AMS 5646
ASTM A 269
ASTM A 276
ASTM A193
ASME SA 269
ASME SA 276
EN 1.4550
PWA-LCS
GE-S400/1000

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