Alloy 330
Alloy 330 is an austenitic nickel-iron-chromium alloy with a specific addition of 1.25% silicon. It was developed specifically to handle the rigors of the industrial heat-treating environment, offering exceptional resistance to carburization and thermal shock.
- الأشكال الشائعة: Plate, Sheet, Round Bar, Pipe, Mesh.
- الميزة الرئيسية: Excellent Carburization & Oxidation Resistance.
- القوة: Good strength up to 2100°F (1150°C).
- Stability: Resistant to thermal cycling and quenching.
In heat treating furnaces, metals undergo brutal conditions: rapid heating, quenching, and exposure to carbon-rich atmospheres. Standard stainless steels become brittle or dissolve. Alloy 330 excels here because its **Silicon** content aids in the formation of a tightly adherent oxide scale, while its high **Nickel** content (35%) prevents embrittlement (sigma phase formation) and stress corrosion cracking.
مقاومة الكربنة
The alloy resists the absorption of carbon and nitrogen, preventing the material from becoming brittle during carburizing and carbonitriding cycles.
Thermal Shock Resistance
Designed to withstand rapid temperature changes, such as oil quenching, without cracking or severe distortion.
Immunity to Sigma Phase
The microstructure remains stable even after long-term exposure to intermediate temperatures, unlike Incoloy 800 or 300 series stainless.
| العنصر | المحتوى (%) |
|---|---|
| النيكل (ني) | 34.0 - 37.0 |
| الكروم (Cr) | 17.0 - 20.0 |
| السيليكون (Si) | 1.0 - 1.5 |
| الحديد (Fe) | الرصيد |
| المنجنيز (Mn) | 2.0 max |
| الكربون (C) | 0.08 max |
*Note: The Silicon addition is the critical differentiator from Incoloy 800.
| نموذج المنتج | معايير ASTM / ASME |
|---|---|
| لوحة، ورقة، شريط، شريط | ASTM B536, ASME SB536 |
| بار وقضيب | ASTM B511, ASME SB511 |
| Pipe (Seamless & Welded) | ASTM B535, ASTM B710, ASME SB535 |
| Pipe Fittings | astm B366، ASM SB366 |
| الممتلكات | القيم النموذجية (درجة حرارة الغرفة) |
|---|---|
| قوة الشد | 80 - 95 ksi (550 - 655 MPa) |
| قوة الخضوع (إزاحة 0.2%) | 30 - 45 ksi (205 - 310 MPa) |
| الاستطالة | 35 - 45 % |
| الصلابة (روكويل ب) | 70 - 85 HRB |
*Note: Alloy 330 remains ductile even after long-term service.
Heat Treating Baskets
Trays, baskets, and fixtures used to hold parts during carburizing and hardening cycles.
Furnace Muffles
Retorts and muffles that must contain controlled atmospheres at high temperatures.
Radiant Tubes
Heating tubes in gas-fired furnaces that are subjected to intense thermal cycling.
البتروكيماويات
Pigtails and headers in pyrolysis furnaces requiring carburization resistance.
Need Alloy 330 for Furnaces?
We maintain a large stock of Alloy 330 plate, bar, and pipe. Contact us for cut-to-size material for your thermal processing equipment.
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