アロイ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.
- 一般的なフォーム： Plate, Sheet, Round Bar, Pipe, Mesh.
- 主な特徴 Excellent Carburization & Oxidation Resistance.
- Strength: 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.
Carburization Resistance
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.
| エレメント | コンテンツ（%） |
|---|---|
| ニッケル（Ni） | 34.0 - 37.0 |
| クロム（Cr） | 17.0 - 20.0 |
| ケイ素 (Si) | 1.0 - 1.5 |
| 鉄（Fe） | バランス |
| マンガン (Mn) | 最大2.0 |
| カーボン（C） | 0.08 max |
*Note: The Silicon addition is the critical differentiator from Incoloy 800.
| 製品形態 | ASTM/ASME規格 |
|---|---|
| プレート、シート、ストリップ | ASTM B536, ASME SB536 |
| バー＆ロッド | ASTM B511, ASME SB511 |
| パイプ（シームレスおよび溶接） | ASTM B535, ASTM B710, ASME SB535 |
| Pipe Fittings | ASMB366、ASME SB366 |
| プロパティ | 代表値（室温） |
|---|---|
| 引張強度 | 80 - 95 ksi (550 - 655 MPa) |
| 降伏強さ（0.2%オフセット） | 30 - 45 ksi (205 - 310 MPa) |
| 伸び | 35 - 45 % |
| 硬度（ロックウェルB） | 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.
石油化学
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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