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Alloy 330 Threaded Rods

Alloy 330 Threaded Rods 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 Threaded Rods 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 Threaded Rods
SKU: 0

Specialist in Alloy 330 Threaded Rods · UNS N08330 · 1.4886

Alloy 330 Threaded Rods: Continuous Thread · Double-End Studs · Custom Cut

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

RAYCHIN LIMITED is a recognized expert in Alloy 330 threaded rods — from continuous thread rods, double-end stud bolts, tap-end studs to fully custom configurations. Engineered for extreme heat environments up to 1150°C, these rods offer exceptional oxidation resistance, carburization resistance, and thermal stability. Our portfolio includes UNC/UNF and metric threads, rolled or cut threads, and lengths up to 4000mm. 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 Threaded RodsAlloy 330 all-thread rodsUNS N08330 threaded rod1.4886 threaded rodhigh temperature threaded rodsfurnace threaded rodsAlloy 330 stud boltsAlloy 330 continuous threadAlloy 330 double-end studsAlloy 330 tap-end studsASTM B511 threaded rodX12NiCrSi35-16 threaded rodRA330 threaded rodAlloy 330 fully threaded rod

Alloy 330 Threaded Rods – Full Product Range

Continuous Thread Rods

Fully threaded Alloy 330 continuous thread rods for applications requiring threading along the entire length. Ideal for tie rods, anchor bolts, and HVAC supports in high-temperature environments. Available in standard 1m, 2m, 3m lengths or custom cut.

UNC/UNFMetric coarse/fineRolled threadsCut threads

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 and pressure vessels.

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 and removable fixtures.

Custom thread lengthsVarious end configurations

Full Thread vs. Partial Thread

Alloy 330 fully threaded rods provide maximum thread engagement. Partial thread rods feature an unthreaded center section for shear applications. Both configurations available in all standard diameters.

Full threadPartial threadCustom grip lengths

Metric & UNC Threaded Rods

Alloy 330 threaded rods available in all standard thread forms: UNC, UNF, metric coarse, metric fine, UNJ, and MJ threads. Classes 2A, 3A, 6g, and custom tolerances.

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

Custom Threaded Rods

Alloy 330 custom threaded rods manufactured to your prints: special lengths up to 6000mm, left-hand threads, reduced ends, drilled heads, or non-standard diameters.

Special lengthsLeft-hand threadVented optionsStep diameters

International Standards & Global Designations for Alloy 330

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

Country / Region	Standard / Specification	Designation / Grade
USA	ASTM B511 (bars), ASTM B535 (seamless pipe), ASTM B546 (welded pipe), ASTM 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 ASTM B546 AMS 5716 NAS 330 AN 330

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

Our Alloy 330 threaded rods 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 threaded rods in cyclic heating/cooling furnace environments.

Complete Mechanical Properties – Alloy 330 Threaded Rods (Solution Annealed)

All threaded rods are supplied in the solution annealed condition (1038‑1066°C / water quench). Minimum tensile requirements per ASTM B511 for bar stock:

Property	Metric (min)	Imperial (min)
Tensile Strength (Rm)	552 – 621 MPa	80 – 90 ksi
Yield Strength 0.2% (Rp0.2)	≥ 207 – 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 Threaded Rods

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
593°C (1100°F)	458	167	46
649°C (1200°F)	391	152	43
704°C (1300°F)	305	145	69
760°C (1400°F)	247	143	78
816°C (1500°F)	185	119	56
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 1000 hours (MPa)
760°C (1400°F)	48
871°C (1600°F)	21
982°C (1800°F)	8.6

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 (2520-2597°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
Specific heat (0-100°C)	460 J/kg·K

Corrosion Resistance of Alloy 330 Threaded Rods

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.
Nitriding: Good resistance to nitrogen-rich atmospheres (cracked ammonia, nitriding furnaces).
Stress corrosion cracking: High nickel content provides immunity to chloride SCC in most environments, superior to 304 and 316 stainless steels.
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, resists sigma phase embrittlement at all temperatures.
Thermal shock: Excellent resistance to thermal shock, designed to withstand quenching cycles.

Corrosion Engineering Note: Alloy 330 is optimized for high-temperature oxidizing, carburizing, and nitriding atmospheres. 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

Thread Rolling & Heat Treatment

Our Alloy 330 threaded rods 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 (1038-1066°C) and water quenching to guarantee optimum high-temperature properties. In-house PMI verification ensures material conformity.

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 Threaded Rods – Typical Applications & Industries

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

Furnace tie rods & supports
Heat treating baskets & fixtures
Radiant tube hangers
Annealing cover studs
Gas turbine components
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

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

Why RAYCHIN LIMITED – The Alloy 330 Threaded Rod Authority

Metallurgical competence

Engineers with deep expertise in high‑temperature alloys. We ensure proper solution annealing and rapid quench for every Alloy 330 threaded rod. 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. Fast turnaround for prototypes and emergency shutdowns. 24/7 customer support.

Custom capabilities

Special lengths up to 6000mm, left‑hand threads, reduced ends, step diameters, 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 threaded rod experts today

Request a quote for Alloy 330 threaded rods, continuous thread, double-end studs, tap-end 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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