Alloy 330 Button Head Cap Screws
RAYCHIN SPECIALTY METALS FASTENERS: BOLTS, NUTS, SCREWS, WASHERS, STUDS, THREADED RODS, U-BOLT, J-BOLTS
STANDARD AND CUSTOMIZED, SMALL BATCH AND LARGE BATCH, IMPERIAL AND METRIC
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
Specialist in Alloy 330 Button Head Cap Screws · UNS N08330 · 1.4886Alloy 330 Button Head Cap Screws: High‑Strength, High‑Temperature Fasteners
RAYCHIN LIMITED is a premier manufacturer of Alloy 330 Button Head Cap Screws. Designed for extreme temperature service up to 1150°C, these screws combine a low-profile button head with internal hex drive, allowing secure fastening in furnace interiors, heat treating fixtures, and petrochemical heaters. Our Alloy 330 button head cap screws are produced to precise dimensional standards (ASME B18.3, DIN 912 / ISO 7380 counterpart with button head) and are available in a wide range of diameters (#0 through 1" and M2 to M24), lengths, and drive types (hex socket, Torx, Phillips). Every screw is solution annealed and offers exceptional oxidation, carburization, and thermal fatigue resistance.
Precision Alloy 330 Button Head Cap Screws – Product Highlights
Dimensions & Drive Options
Manufactured to ASME B18.3 (inch series socket cap), ISO 7380 (hex socket button head), and custom configurations. Available drive types: hex socket (standard), Torx®, Phillips, and slotted. Diameters from #0 (M1.6) up to 1" (M24), lengths 3mm to 200mm. Full UNF/UNC and metric coarse/fine threads. Alloy 330 button head cap screws feature a low head height for clearance-limited high-temperature assemblies.
Applicable Standards & Custom Work
Produced and tested in accordance with: NAS, AN, MS, ANSI, ASTM B408 / A473, ASME, SAE, API, NACE (if applicable), ISO, DIN, KS, JIS, GB. RAYCHIN offers custom head markings, non‑standard lengths, reduced shanks, and special drive depths. Full PMI (positive material identification) available on request.
International Standards & Global Designations for Alloy 330
Our Alloy 330 Button Head Cap Screws are manufactured from material meeting these worldwide specifications:
UNS N08330 1.4886 X12NiCrSi35-16 ASTM B408 EN 10095 NAS 330 AN 330
Chemical Composition (Weight %) – Alloy 330 (UNS N08330 / 1.4886)
Our Alloy 330 button head cap screws are produced from certified melts conforming to ASTM B408 limits:
Complete Mechanical Properties – Alloy 330 Button Head Cap Screws
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:
High Temperature Performance of Alloy 330 Button Head Cap 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:
Oxidation resistance: Continuous service in air up to 1150°C; intermittent service even higher. The alloy forms a tightly adherent oxide scale that resists spalling.
Thermal Stability & Physical Data
Corrosion Resistance of Alloy 330 Button Head Cap Screws
While Alloy 330 is optimized for high‑temperature environments, it offers good resistance to many corrosive conditions:
- Oxidation & sulfidation: Exceptional resistance in air, combustion gases, and sulfur‑bearing atmospheres up to 1150°C.
- Carburization: High nickel content (≥33%) provides excellent resistance to carbon absorption.
- Nitriding: Resists nitrogen penetration in ammonia-based atmospheres.
- Aqueous corrosion: Similar to 310 stainless; suitable for organic acids, but NOT intended for strong reducing acids or chloride pitting/crevice corrosion.
- Stress corrosion cracking: Immunity to chloride SCC due to high nickel.
Expert Manufacturing – Alloy 330 Button Head Cap Screws
Precision Thread Rolling & Head Forming
Our Alloy 330 button head cap screws are produced using CNC multi‑spindle machines and thread rolling for improved grain flow. After forming, each lot is solution annealed in a controlled atmosphere furnace and water quenched to restore maximum ductility and high‑temperature properties. Dimensional inspection on optical comparators and automated vision systems ensures compliance with ASME/ISO standards.
Traceability & Certification
All screws are traceable from melt to finished product. We provide EN 10204 3.1 mill certificates, and third‑party inspections (DNV, Lloyds, TÜV, ABS) are available upon request. Nondestructive testing (PT, MT, UT) can be performed per customer specification. RAYCHIN is ISO 9001:2015 and AS9100D certified.
Industries Relying on Alloy 330 Button Head Cap Screws
Our Alloy 330 button head cap screws are specified for:
- Furnace fixtures & radiant tubes
- Heat treating baskets & retorts
- Petrochemical heater supports
- Annealing covers & muffles
- Ceramic fiber module attachments
- Burner nozzles & dampers
- Exhaust systems & thermal oxidizers
- Power generation boiler components
We also supply matching Alloy 330 nuts, washers, and stud bolts for complete high‑temperature bolting sets.
Why RAYCHIN LIMITED – The Alloy 330 Button Head Cap Screw Authority
Metallurgical expertise
Engineers specialized in high‑temperature alloys. We ensure proper solution annealing and rapid quench for every Alloy 330 button head cap screw. In‑house testing verifies hardness, tensile, and grain size.
Global approvals & inventory
ISO 9001:2015, AS9100D. We stock a wide range of inch & metric sizes in various drive types. Fast turnaround for prototypes and emergency shutdowns.
Custom capabilities
Special drive depths, non‑standard lengths, reduced shank, and even left‑hand threads. Short runs welcome. 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 traceability. We speak English, German, Mandarin, Japanese.
Request a quote for Alloy 330 Button Head Cap 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 566ISO 9001:2015 · AS9100D · EN 10204 3.1/3.2 · third‑party inspection welcome.
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