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Alloy 330 Pan Head Screws

Alloy 330 Pan Head Screws are specifically designed for high temperature furnace applications such as vacuum furnaces, heat treating and brazing applications. The most prized trait of alloy 330 is its ability perform under cyclic conditions of temperature extremes from heating and cooling; as well as in alternate carburizing and oxidizing atmospheres. An austenitic, nickel-chromium-iron-silicon alloy, Alloy 330 Pan Head Screws also offer industry a low coefficient of expansion, excellent ductility, and high strength.

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An engineered high temperature resistant steel
Excellent high temperature stability and chemistry and specifications
Very oxidation and carburization resistant to 2100°F
Good resistance to thermal shock and quenching
Resistance to thermal shock from repeated quenching
High level of resistance to oxidation and carburization
Ability to handle thermal cycling
Provides resistance to scale formation up to about 2000°F
Good resistance to nitrogen-containing atmospheres where the oxygen content is low
High nickel content of 34-37% provides high resistance to chloride stress corrosion cracking and embrittlement

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RAYCHIN LIMITED

Name: Alloy 330 Pan Head Screws
SKU: 0

Specialist in Alloy 330 Pan Head Screws · UNS N08330 · 1.4886

Alloy 330 Pan Head Screws: Versatile High‑Temperature Fasteners

Austenitic Nickel‑Chromium‑Iron‑Silicon Alloy (UNS N08330 / 1.4886 / X12NiCrSi35-16)

RAYCHIN LIMITED is a premier manufacturer of Alloy 330 Pan Head Screws. Designed for extreme heat and corrosive atmospheres up to 1150°C, these screws feature a low‑profile rounded head with a large bearing surface – ideal for securing furnace fixtures, heat treating baskets, and petrochemical equipment. Our Alloy 330 pan head screws are available in slotted, Phillips, hex socket, Torx®, and combination drives. Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS – or fully custom to your drawing.

Alloy 330 Pan Head ScrewsAlloy 330 machine screwsUNS N08330 pan head1.4886 pan head screwsAlloy 330 slotted pan headAlloy 330 Phillips pan headhigh temperature alloy pan headfurnace pan head screwsAlloy 330 hex drive pan headAlloy 330 Torx pan head

Alloy 330 Pan Head Screw – Drive Options & Head Details

Slotted pan headPhillips pan headHex socket pan headTorx® pan headPosidrive pan headSquare drive pan headCombo drive

We manufacture all common drive systems for Alloy 330 pan head screws. Diameters from #0 (M1.6) up to 1" (M24), lengths 3mm to 200mm. Full thread, partial thread, and custom shank lengths. Head dimensions conform to ASME B18.6.3 (inch) and ISO 7045 / DIN 7985 (metric). Special undercut heads or non‑standard heights available on request.

International Standards & Global Designations for Alloy 330

Our Alloy 330 Pan Head Screws are manufactured from material meeting these worldwide specifications:

Country / Region	Standard / Specification	Designation / Grade
USA	ASTM B408 / A473 / A276, ASME SB-408, AMS 5592, AMS 5716	UNS N08330 · Alloy 330 · RA330
Europe (CEN)	EN 10095, EN 10269 (fasteners)	1.4886 · X12NiCrSi35-16
Germany (DIN)	DIN 17752, DIN 17470	X12NiCrSi35-16 / 1.4886
France (NF)	NF A35-572/573 (historical)	Z12NCS35.16
China (GB)	GB/T 20878, GB/T 4238	0Cr12Ni35Si16 / 330
ISO	ISO 4955, ISO 13680	X12NiCrSi35-16
Sweden (SS)	SS 14 23 78 (obsolete)	2378

UNS N08330 1.4886 X12NiCrSi35-16 ASTM B408 AMS 5592 AMS 5716 NAS 330 AN 330

Chemical Composition (Weight %) – Alloy 330 (UNS N08330 / 1.4886)

Our Alloy 330 pan head screws are produced from certified melts conforming to ASTM B408 / A473 limits:

Element	ASTM B408 / UNS N08330 Range %	Typical
Carbon (C)	≤ 0.08	0.05
Silicon (Si)	0.75 – 1.50	1.2
Manganese (Mn)	≤ 2.00	1.0
Phosphorus (P)	≤ 0.040	0.020
Sulfur (S)	≤ 0.030	0.010
Chromium (Cr)	17.0 – 20.0	19.0
Nickel (Ni)	34.0 – 37.0	35.5
Copper (Cu)	≤ 1.00	0.2
Molybdenum (Mo)	≤ 0.75	0.3
Iron (Fe)	Balance	Balance

Metallurgical note: High nickel (34‑37%) + chromium (17‑20%) + silicon (0.75‑1.5%) gives Alloy 330 exceptional resistance to oxidation, carburization, and thermal shock up to 1150°C [citation:4][citation:7]. Ideal for pan head screws in cyclic heating/cooling environments.

Complete Mechanical Properties – Alloy 330 Pan Head Screws (Solution Annealed)

All screws are supplied in the solution annealed condition (1038‑1066°C / water quench). Minimum tensile requirements per ASTM B408 / A473 for bar stock used in fasteners:

Property	Metric (min)	Imperial (min)
Tensile Strength (Rm)	585 – 750 MPa	85 – 109 ksi
Yield Strength 0.2% (Rp0.2)	≥ 205 MPa	≥ 30 ksi
Elongation (A5)	≥ 30%	≥ 30%
Hardness (HRB)	≤ 85 HRB	≤ 85 HRB
Modulus of Elasticity	196 GPa	28,400 ksi
Density	8.08 g/cm³	0.292 lb/in³

High Temperature Performance of Alloy 330 Pan Head Screws

Alloy 330 is specifically formulated for elevated temperature service. The following data represent short‑time elevated temperature yield strength (0.2% offset) based on typical annealed condition:

Temperature	Yield Strength Rp0.2 (approx.)
21°C (70°F)	205 MPa (30 ksi)
538°C (1000°F)	140 MPa (20.3 ksi)
649°C (1200°F)	130 MPa (18.9 ksi)
760°C (1400°F)	115 MPa (16.7 ksi)
871°C (1600°F)	75 MPa (10.9 ksi)
982°C (1800°F)	35 MPa (5.1 ksi)
1093°C (2000°F)	20 MPa (2.9 ksi) (short time)

Oxidation resistance: Continuous service in air up to 1150°C (2100°F); excellent resistance to scaling, carburization, and nitriding [citation:4][citation:7].

Thermal Stability & Physical Data [citation:4][citation:8]

Maximum continuous service temperature (oxidizing)	1150°C (2100°F)
Solution annealing range	1038‑1066°C (1900‑1950°F)
Melting range	1371‑1427°C (2500‑2600°F)
Thermal conductivity at 500°C	21 W/m·K
Mean CTE (20‑1000°C)	18.5 ×10⁻⁶ /°C

Corrosion Resistance of Alloy 330 Pan Head Screws

While Alloy 330 is optimized for high‑temperature environments, it offers good resistance to many corrosive conditions:

Oxidation & carburization: Exceptional resistance in air, combustion gases, and sulfur‑bearing atmospheres up to 1150°C [citation:3][citation:5].
Nitriding: Good resistance to nitrogen‑rich atmospheres (e.g., cracked ammonia) [citation:5].
Stress corrosion cracking: High nickel content (34‑37%) provides immunity to chloride SCC [citation:4][citation:5].
Aqueous corrosion: Similar to 310 stainless; suitable for organic acids, but NOT intended for strong reducing acids or chloride pitting environments [citation:4].
Oxidizing/Reducing sulfur: Performs well in oxidizing sulfur; for reducing sulfur consult our engineers [citation:7].

Corrosion note: Alloy 330 is not designed for seawater or strong chloride solutions (for those we offer 254 SMO). It excels in dry, oxidizing, carburizing, and nitriding atmospheres. NACE MR0175 suitability depends on specific conditions – contact RAYCHIN for details.

Precision Manufacturing & Global Standards Compliance

CNC Forming & Heat Treatment

Our Alloy 330 pan head screws are cold‑headed or CNC machined from solution‑annealed bar stock, then thread rolled for improved grain flow. Each lot undergoes solution annealing (1038‑1066°C) and water quenching to guarantee optimum high‑temperature properties. Automated optical inspection verifies head contour, drive depth, and thread form to ASME/ISO specifications.

Traceability & Third‑Party Testing

Full traceability from melt to finished product. Certificates EN 10204 3.1/3.2. NDT (PT, MT, UT) available on request. Our quality system: ISO 9001:2015, AS9100D. We also comply with NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS, JIS, GB. Custom designs welcome.

Alloy 330 Pan Head Screws – Typical Applications & Industries

Our Alloy 330 pan head screws are widely used in:

Furnace muffles & retorts
Heat treating baskets & fixtures
Radiant tubes & burner nozzles
Annealing covers & quenching systems
Gas turbine components
Petroleum heater supports
Exhaust systems & thermal oxidizers
Salt bath furnaces (cyanide/nitrate)

We also supply matching Alloy 330 nuts, washers, and stud bolts for complete high‑temperature bolting sets.

Why RAYCHIN LIMITED – The Alloy 330 Pan Head Screw Authority

Metallurgical expertise

Engineers specializing in high‑temperature alloys. We guarantee proper solution annealing and rapid quench for every Alloy 330 pan head screw. In‑house PMI and mechanical testing.

Global approvals & inventory

ISO 9001:2015, AS9100D. Extensive stock of inch & metric sizes, all common drives. Fast turnaround for prototypes and emergency shutdowns.

Custom capabilities

Special drive depths, non‑standard lengths, reduced shank, left‑hand threads, and custom head configurations. High‑temperature anti‑seize coatings available.

Full compliance

Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS. Material certifications with full traceability. We speak English, German, Mandarin, Japanese.

Request a quote for Alloy 330 Pan Head Screws – any standard or custom specification.

Contact our engineering team for application assistance, high‑temperature performance data, or NACE MR0175 suitability (case‑by‑case).

sales@ray-chin.com | +86 534 2166 566

ISO 9001:2015 · AS9100D · EN 10204 3.1/3.2 · third‑party inspection (DNV, Lloyds, TÜV) welcome.

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