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You are here: Home- NewsASTM A240 Grade 347 Stainless Steel Chemical/Physical/Mechanical Properties

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

Posted:2/9/2017 12:13:42 AM

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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