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Alloy 330 Torx Screws

Alloy 330 Torx 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 Torx 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 Torx Screws
SKU: 0

Specialist in Alloy 330 Torx Screws · UNS N08330 · 1.4886

Alloy 330 Torx Screws: Superior Torque & High‑Temperature Endurance

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

RAYCHIN LIMITED is a premier manufacturer of Alloy 330 Torx Screws. Designed for demanding furnace and thermal processing environments, these screws feature a 6‑lobe star drive that resists cam‑out and delivers higher torque while minimizing wear on driver bits. Our Alloy 330 Torx screws withstand oxidation, carburization, and thermal shock up to 1150°C. Available in Torx, Torx Plus, tamper‑resistant (with center pin), internal and external drives, with various head styles: socket cap, button, flat, pan, and more. Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS – or fully custom to your drawing.

Alloy 330 Torx ScrewsAlloy 330 star drive screwsUNS N08330 Torx1.4886 Torx screwsAlloy 330 Torx Plushigh temperature alloy Torx screwsfurnace Torx fastenersAlloy 330 tamper resistant TorxAlloy 330 socket head TorxAlloy 330 button head Torx

Alloy 330 Torx Screw – Product Range by Head Style

Torx Socket Cap

Alloy 330 Torx socket cap screws combine the strength of a socket head with the torque advantages of a star drive. Ideal for confined spaces in furnace assemblies. Manufactured to ASME B18.3 / ISO 4762 with Torx drive.

Hexalobular internalStandard TorxTorx Plus

Sizes: #0 to 1" (M1.6 to M24)

Torx Button Head

Alloy 330 Torx button head screws provide a low-profile, rounded head for aesthetic and clearance-sensitive applications. Available with internal Torx drive.

Low headFull headTamper‑resistant

Meets: ISO 7380‑2 / DIN 7985 Torx variants

Torx Flat Head

Alloy 330 Torx flat head (countersunk) screws offer flush mounting with 82°, 90°, or 100° angles. Star drive prevents cam-out during high‑temperature cycling.

82°90°100°Slotted/Torx combo

Custom angles: available on request

Torx Pan Head

Alloy 330 Torx pan head screws feature a large bearing surface and are widely used in heat treating fixtures and radiant tube supports.

Type IType II cross recessTorx/slotted combo

Drives: T6 to T60

Tamper‑Resistant Torx

Alloy 330 security Torx screws (with center pin) prevent unauthorized removal in critical furnace components and safety barriers.

5‑lobe pin6‑lobe pinTORX TR

Custom pin heights available

External Torx & Shoulder

Alloy 330 external Torx screws (E‑Torx) for high‑torque applications. Also available as shoulder screws with Torx drive for precision alignment in furnace tooling.

E4 to E40Shoulder lengthsMetric/UNC

International Standards & Global Designations for Alloy 330

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

Country / Region	Standard / Specification	Designation / Grade
USA	ASTM B408 / A473, ASME SB-408, AMS 5592, AMS 5716, SAE J405	UNS N08330 · Alloy 330 · RA330
Europe (CEN)	EN 10095, EN 10269 (fasteners), EN 10088-3	1.4886 · X12NiCrSi35-16
Germany (DIN)	DIN 17752, DIN 17470, DIN EN 1.4886	X12NiCrSi35-16 / 1.4886
France (NF)	NF A35-572/573 (historical)	Z12NCS35.16
China (GB)	GB/T 20878, GB/T 4238, GB/T 1220	0Cr12Ni35Si16 / S33010 / 330
Japan (JIS)	JIS G 4312, JIS G 4902	SUH330 / NCF 330
ISO	ISO 4955, ISO 13680	X12NiCrSi35-16

UNS N08330 1.4886 X12NiCrSi35-16 ASTM B408 AMS 5592 AMS 5716 SUH330 NAS 330 AN 330

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

Our Alloy 330 Torx 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)	≤ 0.030	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. Ideal for Torx screws in cyclic heating/cooling furnace environments.

Complete Mechanical Properties – Alloy 330 Torx Screws (Solution Annealed)

All Torx 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 – 290 MPa	≥ 30 – 42 ksi
Elongation (A5)	≥ 30 – 45%	≥ 30 – 45%
Hardness (HRB)	≤ 85 – 95 HRB	≤ 85 – 95 HRB
Modulus of Elasticity	196 GPa	28,400 ksi
Density	8.08 g/cm³	0.292 lb/in³

High Temperature Performance of Alloy 330 Torx Screws

Alloy 330 is specifically formulated for elevated temperature service. The following data represent short‑time elevated temperature yield strength (0.2% offset) and stress rupture properties:

Temperature	Yield Strength Rp0.2 (approx.)	Rupture Strength (1000 h)
21°C (70°F)	205 – 290 MPa (30 – 42 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)	48 MPa (7.0 ksi)
871°C (1600°F)	75 MPa (10.9 ksi)	21 MPa (3.1 ksi)
982°C (1800°F)	35 MPa (5.1 ksi)	8.6 MPa (1.25 ksi)
1093°C (2000°F)	20 MPa (2.9 ksi) (short time)	5.4 MPa (0.78 ksi)

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

Thermal Stability & Physical Data

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	21.6 W/m·K
Mean CTE (20‑1000°C)	18.0 ×10⁻⁶ /°C

Corrosion Resistance of Alloy 330 Torx 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.
Nitriding: Good resistance to nitrogen‑rich atmospheres (e.g., cracked ammonia).
Stress corrosion cracking: High nickel content (34‑37%) provides immunity to chloride SCC.
Aqueous corrosion: Similar to 310 stainless; suitable for organic acids, but NOT intended for strong reducing acids or chloride pitting environments.
Oxidizing sulfur: Performs well in oxidizing sulfur atmospheres.

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 up to 1150°C.

Precision Manufacturing & Global Standards Compliance

Precision Torx Forming & Heat Treatment

Our Alloy 330 Torx screws are cold‑headed or CNC machined from solution‑annealed bar stock. The Torx drive is precision formed to ensure exact fit and maximum torque transfer without cam-out. Each lot undergoes solution annealing (1038‑1066°C) and water quenching to guarantee optimum high‑temperature properties.

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 Torx Screws – Typical Applications & Industries

Our Alloy 330 Torx screws are widely used in demanding high‑temperature assemblies where high torque and tamper resistance are required:

Vacuum furnace hot zones
Heat treating baskets & fixtures
Radiant tube supports
Annealing covers & muffles
Gas turbine components
Petrochemical heater hangers
Exhaust system flanges
Salt bath furnace electrodes
Ceramic fiber module attachments
Cracked ammonia handling equipment

We also supply matching Alloy 330 hex nuts, washers, and threaded rods for complete high‑temperature bolting sets.

Why RAYCHIN LIMITED – The Alloy 330 Torx Screw Authority

Metallurgical expertise

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

Global approvals & inventory

ISO 9001:2015, AS9100D. Extensive stock of inch & metric sizes, all common Torx 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 Torx 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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