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RA330®
RA330® is a patented alloy designed specifically for the heat treatment industry, and to this day RA330® still outperforms the generic version made only to UNS N08330. In addition to meeting the requirements of UNS N08330, Rolled Alloys has tighter chemistry restrictions and proprietary heat treatments to produce an optimum product. Even the weld wire, RA330-04, has increased levels of manganese to avoid hot cracking. When buying a heat resistant alloy, insist on quality, insist it is RA330®.
RA330® alloy is an austenitic heat and corrosion resistant alloy offering an exceptional combination of strength and resistance to carburization, oxidation and thermal shock. Carburization and oxidation resistance to 2100°F (1148°C) are enhanced by a nominal 1.25% silicon addition. RA330® alloy finds wide application in high temperature industrial environments where good resistance to the combined effects of carburization and thermal cycling are required. RA330® alloy remains fully austenitic at all temperatures and is not subject to embrittlement from sigma formation.
Rolled Alloys and our RA330® alloy were both created to service the need of the thermal process industries for a reliable source of a wrought alloy that could handle the rigors high temperature carburizing conditions and repeated quenching. Both our company and our RA330® alloy product began as parts of the Michigan Steel Castings Company (MISCO). The predecessor to RA330® was an alloy known as MISCO metal, it was a rolled version of the cast HT alloy and 35% nickel, 15% chromium. Its success came as a replacement to castings which were less ductile and fractured during harsh temperature cycling.
In 1953, Rolled Alloys became an independent company and MISCO metal became RA330® alloy. Over the past 60 years, we have applied our knowledge and close working relationship with the thermal process industry to modify RA330® to optimize its performance. These efforts include adjusting its chemistry to its current 35% nickel, 19% chromium, 1.25% silicon and controlled production techniques to ensure a product that has the optimal microstructure to withstand repeated thermal cycling.
- Oxidation resistance to 2100°F (1148°C)
- Resistant to carburization and nitriding
- Resistance to thermal shock
- Good strength at elevated temperature
- Metallurgical stability
UNS: N08330
W. NR.: 1.4886
EN: 10095
ASTM: B 536, B 511, B 512, B 535, B 546, B 710, B 739
ASME: SB 536, SB 511, SB 535, SB 710
AMS: 5592, 5716
Incoloy Alloy 330, Alloy 330, UNS N08330
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