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Alloy 330 Studs

Alloy 330 Studs 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 Studs also offer industry a low coefficient of expansion, excellent ductility, and high strength.

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

Name: Alloy 330 Studs
SKU: 0

Specialist in Alloy 330 Studs · UNS N08330 · 1.4886

Alloy 330 Studs: Double-End · Tap-End · Fully Threaded · Custom

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

RAYCHIN LIMITED is a recognized expert in Alloy 330 studs — from double-end stud bolts, tap-end studs, fully threaded studs to fully custom configurations. Engineered for extreme heat environments up to 1150°C, these studs offer exceptional oxidation resistance, carburization resistance, and thermal stability. Our portfolio includes studs with UNC/UNF and metric threads, rolled or cut threads, and various end configurations. Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS – or custom to your drawing. Supplied with matching Alloy 330 hex nuts upon request.

Alloy 330 StudsAlloy 330 stud boltsUNS N08330 studs1.4886 studshigh temperature studsfurnace studsAlloy 330 double-end studsAlloy 330 tap-end studsAlloy 330 fully threaded studsAlloy 330 threaded studsASTM B511 studsX12NiCrSi35-16 studsRA330 stud boltsAlloy 330 anchor studs

Alloy 330 Studs – Full Product Range

Double-End Stud Bolts

Alloy 330 double-end stud bolts feature threads on both ends with an unthreaded center section. Supplied with two heavy hex nuts manufactured from matching Alloy 330 material. Ideal for flange connections, pressure vessels, and high-temperature equipment requiring through-bolting.

ASME B16.5API flangesFull thread endsReduced shank

Tap-End Studs

Alloy 330 tap-end studs feature a longer thread on one end for permanent installation into tapped holes, with a standard thread on the opposite end for nut engagement. Commonly used in furnace covers, removable fixtures, and refractory anchor systems.

Custom thread lengthsVarious end configurationsStep-down designs

Fully Threaded Studs

Alloy 330 fully threaded studs provide continuous threading along the entire length for maximum versatility. Ideal for applications requiring adjustable engagement or where full thread coverage is necessary.

Continuous threadUNC/UNFMetric coarse/fineLengths up to 4000mm

Reducer Studs (Step-Down)

Alloy 330 reducer studs feature different diameters on each end, allowing connection of components with mismatched thread sizes. Custom manufactured to precise specifications for specialized high-temperature applications.

Custom diametersStep transitionsLeft-right threads

Metric & UNC Studs

Alloy 330 studs available in all standard thread forms: UNC, UNF, metric coarse, metric fine, UNJ, and MJ threads. Classes 2A, 3A, 6g, and custom tolerances. Full range of diameters from 1/4" to 4" (M6 to M100).

UNC #4 to 4"M3 to M100UNF fine pitchSpecial threads

Custom Studs

Alloy 330 custom studs manufactured to your prints: special lengths up to 6000mm, left-hand threads, reduced ends, step diameters, drilled ends, or non-standard thread configurations.

Special lengthsLeft-hand threadVented optionsDrilled ends

International Standards & Global Designations for Alloy 330

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

Country / Region	Standard / Specification	Designation / Grade
USA	ASTM B511 / B512 / B535 / B536 / B546 / B710, ASME SB-511, AMS 5592, AMS 5716	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
NACE	NACE MR0175 / ISO 15156	Alloy 330 (qualified for sour service with limitations)

UNS N08330 1.4886 X12NiCrSi35-16 ASTM B511 ASTM B535 AMS 5716 NAS 330 AN 330

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

Our Alloy 330 studs are produced from certified melts conforming to ASTM B511 limits:

Element	ASTM B511 / UNS N08330 Range %	Typical
Carbon (C)	≤ 0.08	0.05
Silicon (Si)	0.75 – 1.50	1.25
Manganese (Mn)	≤ 2.00	1.20
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	0.20
Molybdenum (Mo)	≤ 0.75	0.30
Iron (Fe)	Balance	Balance

Expert note: The silicon addition (1.0-1.5%) significantly enhances oxidation resistance and spallation resistance during thermal cycling. The high nickel content (34-37%) provides exceptional resistance to carburization and thermal fatigue, making Alloy 330 ideal for studs in cyclic heating/cooling furnace environments. The alloy remains fully austenitic at all temperatures and is not subject to sigma phase embrittlement.

Complete Mechanical Properties – Alloy 330 Studs (Solution Annealed)

All studs are supplied in the solution annealed condition (1038‑1120°C / water quench). Minimum tensile requirements per ASTM B511 for bar stock:

Property	Metric (min)	Imperial (min)
Tensile Strength (Rm)	550 – 620 MPa	80 – 90 ksi
Yield Strength 0.2% (Rp0.2)	≥ 205 – 290 MPa	≥ 30 – 42 ksi
Elongation (A5)	≥ 35 – 45%	≥ 35 – 45%
Hardness (Rockwell)	≤ 95 HRB	≤ 95 HRB
Modulus of Elasticity	196 – 200 GPa	28,400 – 29,000 ksi
Density	8.08 g/cm³	0.292 lb/in³

High Temperature Performance of Alloy 330 Studs

Alloy 330 is specifically formulated for elevated temperature service. Short‑time elevated temperature tensile properties and rupture data:

Short-Time Elevated Temperature Tensile Properties

Temperature	Tensile Strength (MPa)	Yield Strength 0.2% (MPa)	Elongation (%)
21°C (70°F)	585	269	47
538°C (1000°F)	489	172	46
649°C (1200°F)	391	152	43
760°C (1400°F)	247	143	78
871°C (1600°F)	145	106	79
982°C (1800°F)	72	59	79
1093°C (2000°F)	22	14	28

Typical Creep-Rupture Properties

Temperature	Stress for Rupture in 1,000 hours (MPa)	Stress for Rupture in 10,000 hours (MPa)
760°C (1400°F)	69	48
871°C (1600°F)	31	21
982°C (1800°F)	12	8.6
1093°C (2000°F)	5.2	3.8

Oxidation resistance: Continuous service in air up to 1150°C (2100°F); excellent resistance to scaling, carburization, and nitriding. The silicon addition enhances oxide spallation resistance during thermal cycling.

Thermal Stability & Physical Data

Maximum continuous service temperature (oxidizing)	1150°C (2100°F)
Melting range	1380-1425°C (2515-2600°F)
Thermal conductivity at 500°C	21.6 W/m·K
Mean CTE (20-1000°C)	18.0 ×10⁻⁶ /°C
Electrical resistivity at 20°C	1.02 ×10⁻⁶ Ω·m
Magnetic permeability	1.02 (essentially non-magnetic)

Corrosion Resistance of Alloy 330 Studs

Alloy 330 offers excellent corrosion resistance in both high-temperature and aqueous environments:

Oxidation & scaling: Exceptional resistance in air, combustion gases, and sulfur‑bearing atmospheres up to 1150°C. The silicon addition enhances oxide adhesion and spallation resistance.
Carburization: High nickel content (34-37%) provides excellent resistance to carbon absorption in carbon-rich atmospheres, making it ideal for furnace components and heat treating equipment.
Nitriding: Good resistance to nitrogen-rich atmospheres (cracked ammonia, nitriding furnaces) due to stable austenitic structure.
Stress corrosion cracking: High nickel content provides immunity to chloride SCC in most environments, superior to 304 and 316 stainless steels.
Thermal shock: Excellent resistance to thermal shock, designed to withstand repeated quenching cycles without cracking or degradation.
Aqueous corrosion: Similar to 310 stainless; suitable for organic acids, nitric acid, and many oxidizing environments. Not intended for strong reducing acids or chloride pitting environments.
Sigma phase resistance: Fully austenitic at all temperatures, resists sigma phase embrittlement even after prolonged high-temperature exposure.

Corrosion Engineering Note: Alloy 330 is optimized for high-temperature oxidizing, carburizing, and nitriding atmospheres. Its high nickel content provides exceptional resistance to thermal fatigue and thermal shock. For applications requiring resistance to seawater or strong chlorides, we recommend 254 SMO or 6% Mo grades. Third-party corrosion testing per ASTM standards available upon request.

Precision Manufacturing & Global Standards Compliance

Precision Thread Rolling & Heat Treatment

Our Alloy 330 studs are produced from solution-annealed bar stock. Threads are rolled for improved grain flow and fatigue resistance, or cut for custom configurations. Each lot undergoes solution annealing (1038-1120°C) and water quenching to guarantee optimum high-temperature properties. In-house PMI verification ensures material conformity to ASTM B511.

Traceability & Third‑Party Testing

Full traceability from melt to finished product. Certificates EN 10204 3.1/3.2. NDT (PT, MT, UT) available. Quality system: ISO 9001:2015, AS9100D. Compliant with NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS, JIS, GB. Thread gauging per ASME B1.2 and B1.3M.

Alloy 330 Studs – Typical Applications & Industries

Our Alloy 330 studs are widely used in demanding high‑temperature assemblies:

Furnace anchor studs & supports
Heat treating baskets & fixtures
Radiant tube hangers
Annealing cover studs
Gas turbine component fastening
Petrochemical heater supports
Boiler damper linkages
Salt bath furnace electrodes
Ceramic fiber module attachments
Quench system anchors
Refractory anchor bolts
Exhaust system supports
Muffle furnace components
Conveyor system rods & studs
Pressure vessel studding
Flange connections (high-temperature)

Matching Alloy 330 heavy hex nuts, flat washers, and coupling nuts available for complete bolting sets.

Why RAYCHIN LIMITED – The Alloy 330 Stud Authority

Metallurgical competence

Engineers with deep expertise in high‑temperature alloys. We ensure proper solution annealing and rapid quench for every Alloy 330 stud. In‑house PMI and mechanical testing guarantee material conformity to ASTM B511.

Global approvals & inventory

ISO 9001:2015, AS9100D. Extensive stock of inch & metric sizes in various lengths and configurations. Fast turnaround for prototypes and emergency shutdowns. 24/7 customer support.

Custom capabilities

Special lengths up to 6000mm, left‑hand threads, step-down diameters, reduced ends, drilled heads, and custom end configurations. High‑temperature anti‑seize coatings and passivation available.

Full compliance

Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS. Full traceability with EN 10204 3.1/3.2 certifications. We speak English, German, Mandarin, Japanese.

Contact the Alloy 330 stud experts today

Request a quote for Alloy 330 studs, double-end stud bolts, tap-end studs, fully threaded studs – any standard (NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS) or custom specification.

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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