High Temp Metals 800-500-2141 - RA330 Technical Information

RA 330 TECHNICAL DATA

Type Analysis

Element	Min	Max
Carbon	--	0.08
Manganese	--	2.00
Silicon	0.75	1.50
Phosphorus	--	0.03
Sulfur	--	0.03
Chromium	17.0	20.0
Nickel	34.0	37.0
Copper	--	1.00
Lead	--	0.005
Tin	--	0.025
Iron	Rem

Description

RA330 is the workhorse of the heat resistant alloys. It has good strength, carburization and oxidation resistance to about 2200 °F. These properties are enhanced by a nominal 1.25% silicon addition. RA330 has been designed to withstand the thermal shock of liquid quenching.

Application

RA330 finds wide application in high temperature industrial environments where good resistance to the combined effects of carburization and thermal cycling is a prime requisite such as: Furnace containers-carburizing, carbonitriding, annealing, malleablizing, mufflers, retorts, quenching fixtures, bar frame heat treating baskets, heat exchangers, radiant tubes, salt pots, both neutral and cyanide, gas turbine parts, petrochemical furnace components, furnace fans and shafts, conveyors, and hot pressing platens formation.

Corrosion Resistance

RA330 is highly resistant to chloride ion stress corrosion cracking and is a useful engineering choice for those applications where common stainless has failed by stress corrosion.

Workability

RA330 is readily worked by forming and machining procedures similar to those used with the austenitic stainless steels or nickel-chromium alloys. Forming at room temperature is suggested whenever possible. Heat treatment is not neccessary after most forming or welding operations. When required, the suggested full anneal is 1900-2050 °F, rapid air cool or water quenched.RA330 may be readily welded using RA330-04 weld fillers of matching composition. Do not use AWS ER330. Keep interpass temperatures low, do not preheat, do use reinforced stringer beads. Machinability rating 20-25% of B 1112.

Mechanical Properties

Typical Room Temperature Properties:

Tensile
Strength, psi
85,000

0.2% Yield
Strength, psi
39,000

Elongation
%
47

Hardness
Rb
70-85

Typical Creep-Rupture Properties:

Temp
Deg F

1400
1600
1800

Stress, psi, for a
Minimum Creep Rate
of 1% in 10,000 hrs
3600
2100
500

10,000 hr Rupture
Strength, psi

4300
1700
630

Physical Properties

Density lb/in(3)                                                                           Melting Range Deg F
      0.287                                                                                                2450-2540

Temp
° F

70
1400
1600
1800

Coefficient* of
Thermal Expansion
in/in °F x 10(-6)
--
9.7
9.8
10.0

Thermal
Conductivity
Btu-ft/ft(2)-hr-Deg F
7.2
13.7
14.2
14.7

Modulus of
Elasticity Dynamic
psi x 10(6)
28.5
21.0
19.5
18.0

*70 Deg F to indicate temperature.

RA330 - Current Inventory Stock

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