RA330: Complete Properties & Application Guide

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Overview

RA330 (UNS N08330 / W.Nr. 1.4886) is a nickel-iron-chromium alloy with excellent resistance to thermal shock and carburization up to 1150°C. The silicon content provides outstanding oxidation resistance, while the nickel content gives stability against sigma phase embrittlement.

Chemical Composition

The chemical composition of RA330 is carefully controlled to achieve its unique combination of properties and performance characteristics.

Element	Min %	Max %
Nickel (Ni)	34.0	37.0
Iron (Fe)	Balance	Balance
Chromium (Cr)	17.0	20.0
Carbon (C)	—	0.08
Manganese (Mn)	—	2.0
Silicon (Si)	0.75	1.5
Phosphorus (P)	—	0.03
Sulfur (S)	—	0.03

Mechanical Properties at Room Temperature

The mechanical properties of RA330 vary depending on product form and heat treatment condition. The data below represents typical values for solution-annealed material.

Property	Value
Tensile Strength	517 MPa
Yield Strength (0.2% offset)	207 MPa
Elongation in 2 inches	40%
Density	8.02 g/cm3
Melting Point	1400 °C
Max Service Temperature	1150 °C

Corrosion Resistance

Excellent oxidation resistance up to 1150°C. Outstanding resistance to carburization in high-temperature carbon-containing atmospheres. Good resistance to thermal fatigue and thermal shock. Resistant to nitriding environments.

Applications

The unique combination of properties makes RA330 suitable for a wide range of demanding applications:

• Industrial Furnaces: Furnace rolls, grids, retorts, and muffles.
• Heat Treatment: Baskets, fixtures, and conveyor belts for heat treatment furnaces.
• Petrochemical: Furnace tubes and reformer components.
• Glass Industry: Molds and components for glass manufacturing.
• Power Generation: Burner nozzles and combustion chamber components.

Available Product Forms

Hangbo Alloy Group manufactures and supplies RA330 in the following product forms, conforming to ASTM, AMS, and ASME specifications:

• Round Bars: Diameters from 6 mm to 300 mm, hot-finished or cold-drawn, solution annealed.
• Seamless Tubes & Pipes: Sizes from 6 mm OD to 219 mm OD, various wall thicknesses.
• Plates & Sheets: Thicknesses from 0.5 mm to 50 mm, hot-rolled or cold-rolled.
• Forgings: Custom flanges, rings, discs, and complex shapes per customer drawing.
• Welding Wire: Diameters 0.8 mm to 5.0 mm, precision-wound coils and spools.

Related Standards

Standard	Description
ASTM B511	Bar and Rod
ASTM B535	Seamless Pipe and Tube
ASTM B536	Plate, Sheet, and Strip
ASTM B512	Wire
ASTM B366	Fittings
AMS 5716	Bar and Forging

Contact Us for RA330

Hangbo Alloy Group maintains extensive inventory of RA330 in all standard product forms. We can provide mill test certificates, third-party inspection reports (SGS, TUV), and custom processing services.

For quotations, material certifications, or technical consultation, contact our sales team or call +86-136-1165-6360. We typically respond within 10 minutes.