|
|
Features
* Outstanding long-term oxidation and
carburization resistance
* Resists metal dusting
* Exceptional strength to 2200
°F
* Excellent thermal shock and fatigue
resistance
* Hot corrosion resistance
* Resistance to chloride and
polythionic acid stress corrosion
cracking
* Sulfuric acid corrosion
resistance
Applications
* Radiant tubes
* Tube hangers for petroleum refining
and power boilers
* Heat treating fixtures
* Furnace fans and shafts
* Molten glass process equipment
* Stack dampers
* Muffles, retorts
* Gas turbine combustion chambers
* Thermowells
* Flare tips
* Sour water strippers
Nominal Chemical Composition
|
element
|
weight %
|
|
Nickel
|
45
|
|
Chromium
|
25
|
|
Manganese
|
1.5
|
|
Silicon
|
1.0
|
|
Molybdenum
|
3
|
|
Cobalt
|
3
|
|
Tungsten
|
3
|
|
Carbon
|
0.05
|
|
Iron
|
18
|
Specifications
UNS N06333
ASTM B 718, B 719, B 722, B 723, B
726
ASM 5593, 5717
|
|
Performance Profile
RA333 is a high chromium nickel base superalloy
with outstanding resistance to high temperature
oxidation and carburization.
RA333 has an exceptional ability to withstand
the repeated thermal shock of oil or water
quenching. RA333 is one of the few materials that
can withstand corrosive conditions ranging from
aqueous to white heat. The alloy has been used for
dampers and refractory anchors in 13%
SO2/SO3 at 1800 °F, and
for refinery flare tips. Upon shut-down, RA333
resists attack by sulfuric acid formed below the
dew point. It also resists polythionic acid stress
corrosion cracking. RA333 has exceptional
resistance to molten glass and has replaced
platinum spinnerets in the manufacture of
fiberglass.
RA333 is welded with matching composition
RA333-70-16 AC/DC covered electrodes and RA333 bare
wire. Do not preheat, keep interpass temperature
below 212 °F and use reinforced stringer
beads. The machinability rating of RA333 is 12-15%
of B1112; use 20-25 sfm with high speed steel
tools.
Mechanical Properties
Representative Tensile Properties
|
Temp °F
|
Ultimate Tensile Strength,
psi
|
0.2% Yield Strength, psi
|
Elongation %
|
|
70
|
107,000
|
47,000
|
48
|
|
1600
|
27,500
|
23,900
|
75
|
|
1800
|
15,700
|
12,100
|
64
|
|
2000
|
7,400
|
6,500
|
25
|
|
2200
|
4,000
|
3,500
|
106
|
Typical Creep-Rupture Properties
|
Temp °F
|
Stress, psi, for a Minimum creep
Rate of 1% in 10,000 hrs
|
10,000 hr Rupture Strength,
psi
|
|
1400
|
6400
|
9200
|
|
1600
|
2700
|
3100
|
|
1800
|
880
|
1050
|
|
2000
|
-
|
360
|
|
2200
|
-
|
140
|
Physical Properties
Density lb/in3
0.294
|
Melting Range °F
2375-2450
|
|
Temp °F
|
Expansion, in/in°F x
10-6
|
Thermal Conductivity
Btu-ft/ft2•hr•°F
|
Modulus of Elasticity Dynamic, psi x
106
|
|
70
|
-
|
6.41
|
29.2
|
|
1000
|
8.6
|
11.3
|
24.6
|
|
1200
|
9.0
|
12.4
|
23.4
|
|
1400
|
9.3
|
13.5
|
22.1
|
|
1600
|
9.4
|
14.5
|
20.2
|
|
1800
|
9.7
|
15.6
|
18.2
|
|
2000
|
-
|
16.7
|
|
70 °F to indicated temperature.
Detailed technical data for RA333 is in the 33 page
Bulletin 110.
Welding is covered separately in Bulletin 120.
|