Alloy 330 (UNS N08330, ASTM B536) and 800 (N08800, ASTM B409) Foil: Robust High-Temperature Solutions
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In a Southeast Asian petrochemical furnace, standard 310 stainless hangers carburized and collapsed at 1050°C, contaminating batches and halting operations for months. Alloy 330 (UNS N08330, ASTM B536) and 800 (N08800, ASTM B409) foils excel in such environments with superior scaling resistance.
Specifications & Standards
Alloy 330 foil conforms to ASTM B536 (plate/sheet), AMS 5716, DIN 1.4886 for carburizing to 1100°C. Incoloy 800 meets ASTM B409 (sheet), ASME SB409, DIN 1.4876 for nitriding atmospheres.
Both undergo ASTM G28 corrosion, E8 mechanical testing, supporting NACE compliance for chemical exports.
Product Forms & Availability
Foils 0.01-0.5 mm thick, widths to 1200 mm, annealed per ASTM tolerances. 330 for mesh belts, 800 for heater elements.
Mumbai stocks offer slitting for industrial fabricators.
Chemical Composition
| Element | Alloy 330 % | Incoloy 800 % |
|---|---|---|
| Nickel | 34.0-37.0 | 30.0-35.0 |
| Chromium | 17.0-20.0 | 19.0-23.0 |
| Iron | Balance | 39.5-45.0 |
| Silicon | 0.75-1.50 | 1.0 max |
| Copper | - | 0.75 max |
| Titanium | - | 0.6 max |
| Aluminum | - | 0.6 max |
| Carbon | 0.10 max | 0.10 max |
Si in 330 aids scale adhesion; Al+Ti in 800 stabilize structure.
Mechanical & Physical Properties
330: UTS 550 MPa min, yield 205 MPa, 30% EL, density 8.0 g/cm³, oxid resist to 1100°C. 800: UTS 520 MPa, yield 205 MPa, 30% EL.
CTE 17 µm/m·°C for 800, excellent creep rupture.
Why this grade
Alloy 330 is a 35% nickel, 19% chromium alloy carrying about 1.2% silicon, and the silicon is the point — it confers the carburisation and thermal-shock resistance that 800 lacks. That makes it the furnace-hardware grade: radiant tubes, retorts, muffles and heat-treatment fixtures cycling to around 1150°C.
Frequently Asked Questions
Certifications & Compliance
ISO 9001, AD2000-Merkblatt WO, with grain size ASTM E112, hardness tests. PED compliant for pressure parts.
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Alloy 330 and 800 foils ensure reliable service in oxidizing/carburizing heat, backed by standards and performance data. Procurement gains economy with durability. How can these alloys optimize your process?