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Alloy 330 Fasteners

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Alloy 330 Fasteners

Alloy 330 (1.4864) fasteners 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, 330 fasteners 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 Fasteners
SKU: 0

Specialist in Alloy 330 Fasteners · Bolts · Nuts · Screws · Washers · Stud Bolts · Threaded Rods

Alloy 330 Fasteners: Bolts, Nuts, Screws, Washers, Stud Bolts & Threaded Rods

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

RAYCHIN LIMITED is a recognized expert in Alloy 330 fasteners — from Alloy 330 bolts, Alloy 330 nuts, Alloy 330 screws, Alloy 330 washers to Alloy 330 stud bolts and Alloy 330 threaded rods. Our portfolio includes heavy hex bolts, hex nuts, socket head cap screws, flat and lock washers, continuous thread rods, double‑end studs, and custom non‑standard fasteners. Alloy 330 (UNS N08330 / 1.4886) is an austenitic nickel‑chromium‑iron alloy with silicon addition, specifically designed for high‑temperature service up to 1150°C (2100°F) and excellent resistance to oxidation, carburization, and thermal shock. Ideal for furnace equipment, heat treatment fixtures, petrochemical heaters, and power generation.

Alloy 330 fastenersAlloy 330 boltsAlloy 330 nutsAlloy 330 screwsAlloy 330 washersAlloy 330 stud boltsAlloy 330 threaded rodsUNS N08330 fasteners1.4886 fastenershigh temperature alloy boltsX12NiCrSi35-16NAS 330AN 330MS 330Alloy 330 hex boltsAlloy 330 heavy hex nuts

Expertise Across the Full Alloy 330 Fastener Range

Alloy 330 Bolts & Stud Bolts

Hex bolts, heavy hex bolts, structural bolts, flange bolts, socket head cap screws, and precision Alloy 330 stud bolts with UNC/UNF or metric threads. Diameters from 1/4" to 4" (M6–M100). Lengths up to 4000 mm for threaded rods. Manufactured to ASME B18.2.1, DIN 931, DIN 933, ISO 4014. All Alloy 330 stud bolts supplied with matching nuts from same heat.

Alloy 330 Nuts

Hex nuts, heavy hex nuts, jam nuts, slotted nuts, flange nuts, square nuts, coupling nuts, and dome nuts. Precision tapped Alloy 330 nuts meet Class 2B / 6H. Proof load tested per ASTM. Coupling nuts for threaded rod connections in furnace and petrochemical applications.

Alloy 330 Screws

Machine screws (pan, flat, round, truss head), socket set screws, button head cap screws, flat head cap screws. Alloy 330 screws combine high‑temperature strength with oxidation resistance. Custom drive types: Phillips, Torx, combo drive.

Alloy 330 Washers

Flat washers (USS, SAE, oversize), spring lock washers, toothed lock washers, thrust washers. Our Alloy 330 washers are solution annealed from bar/plate for uniform properties. Perfect for high‑temperature bolting assemblies.

Alloy 330 Threaded Rods

Continuous thread rods (full thread) in 1m, 2m, 3m lengths or custom cut. Alloy 330 threaded rods meet ASTM B408 / A473. Used as furnace tie rods, heater supports, and high‑temperature anchor bolts. Rolled threads for improved fatigue.

Custom & Specialty Alloy 330 Fasteners

From dowel pins to valve stem extensions and studs for petrochemical heaters. We machine complex geometries. Heat treatment (solution annealing 1038–1066°C / water quench) precisely controlled. Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS, JIS, GB.

Manufacturing Standards for Alloy 330 Fasteners

RAYCHIN LIMITED manufactures Alloy 330 fasteners to the following national and international standards, ensuring full compliance for projects worldwide.

NASANMSANSIASTMASMESAEAPINACEISODINKSJISGB

RAYCHIN LIMITED manufactures Alloy 330 fasteners to the following national and international standards, ensuring full compliance for projects worldwide. Both standard and non-standard custom configurations are available.

Alloy 330 Fastener Styles

Alloy 330 Screws	12 Point Screws Button Head Cap Screws Flat Head Screws Hex Head Cap Screws Pan Head Screws Security Screws Set Screws Socket Head Cap Screws Vented Screws	• DIN 603 / ISO 8677 • DIN 912 / ISO 4762 • DIN 913 / ISO 4026 • DIN 914 / ISO 4027 • DIN 915 / ISO 4028 • DIN 916 / ISO 4029 • DIN 921 • DIN 931 / ISO 4014 • DIN 933 / ISO 4017 • DIN 961 / ISO 8676 • DIN 965 / ISO 7046 • DIN 966 / ISO 7047 • DIN 7991 / ISO 10642 • DIN 7380 / ISO 7380 • DIN 84 / ISO 1207 • DIN 85 / ISO 1580 • DIN 34822 • DIN 34821 • DIN 7504 / ISO 15480 • DIN 7984 • DIN 963 / ISO 2009




















Alloy 330 Bolts	Hex Head Bolts Shoulder Bolts Wedge Anchor Bolts	• DIN 931 • DIN 933 • ISO 4014 • ISO 4017 • ISO 7370




Alloy 330 Nuts	Hex Nuts Lock Nuts	• DIN 439 / ISO 4035 • DIN 934 / ISO 4032 • DIN 985 / ISO 7040 • DIN 986 • DIN 980 / ISO 7042 / ISO 19513 • DIN 6923 / ISO 4161





Alloy 330 Studs/Rod	Studs Threaded Rod Weld Studs	• DIN 975 • DIN 976


Alloy 330 Washers	Flat Washers Lock Washer	• DIN 125 / ISO 7089 / ISO 7090 • DIN 126 / ISO 7091 • DIN 127 / ISO 7090 • DIN 9021 / ISO 7093



Alloy 330 Hose Clamps	Medium Duty Hose Clamps	--

Alloy 330 Screws

12 Point Screws	Alloy 330 12 point screws allow for higher torque to be applied than a socket head cap screw or head head bolt, however they are be less economical due to the complex head design. Available in 1/4" or larger sizes.	• IFI-115 • MIL SPEC • DIN 34822 • DIN 34821



Button Head Cap Screws	Alloy 330 button head screws offer a wide clamping area and low profile. They are best for fastening material that is too thin to counter bore.	• ASME B18.3 • ASME 18.3.4M • DIN 7380 / ISO 7380


Flat Head Screws	Alloy 330 flat head screws are most commonly offered in an 82° countersink angle, but can be customized to other angles from 60° -120° and are designed to be flush with the surface. Available in slotted and socket drivers. Phillips, 6-lobe, torx and tamperproof drivers in Inconel flat head screws can be made require special manufacturing.	• ASME B18.3 • ASME B18.3.6 • DIN 963 / ISO 2009 • DIN 965 / ISO 7046 • DIN 7991 / ISO 10642




Hex Head Cap Screws	Alloy 330 hex head cap screws offer the added washer face to the bolt head which is lacking on a hex bolt and tighter dimensional tolerances. Ideal for a high clamping force applications with ease of access. Generally availabe in #2 - 1/2" sizes and metric sizes.	• ASME B18.6.3 • DIN 931 / ISO 4014 • DIN 933 / ISO 4017 • DIN 961 / ISO 8676



Pan Head Screws	Alloy 330 pan head screws offer a rounded top are best used for small diameter faster needs. Offered in slotted and they are ideal for low torque applications.	• ASME B18.6.3 • DIN 7985 • DIN 921 • DIN 85 / ISO 1580 • DIN 84 / ISO 1207 (cheese head) • DIN 966 / ISO 7047 (raised counter sunk)







Security Screws	Unique driver designs offer these Alloy 330 screws resistance to unwanted tampering or removal due to the fact that they cannot be removed using an ordinary driver. Inconel security screws are available in several different drive styles, as well as custom per print.	--

Set Screws	Alloy 330 set screws are available in cup, cone, flat, dog and half-dog points. Set screws have no head and are equiped with a socket or slotted driver at one end.	• ASME B18.3 • DIN 913 / ISO 4026 • DIN 914 / ISO 4027 • DIN 915 / ISO 4028 • DIN 916 / ISO 4029




Socket Head Cap Screws	Alloy 330 socket head cap screws are ideal for limited access situations where there is little clearance around the screws. They offer a safe, reliable and economic solution.	• ASMET B18.3 • DIN 912 / ISO 4762 • DIN 7984


Vented Screws	Alloy 330 vented screws are best for vacuum environments because the hole drilled through its axis (from head through threads) allow gases and other contaminents to vent. Inconel vented screws are available in any style.	--

Alloy 330 Bolts

Hex Head Bolts	Alloy 330 hex bolts are similar to hex head cap screws but without the added washer face. They are ideal for high clamping force applications with ease access.	• ASME B18.2.1 • DIN 931 / ISO 4014 • DIN 933 / ISO 4017


Shoulder Bolts	Alloy 330 shoulder bolts are made up of a head, shoulder and threaded segment. The smooth shoulder section allows for rotating parts. Typically available with socket drivers.	• ASME • DIN 7379 / ISO 7379 • ISO 7370


Wedge Anchor Bolts	Alloy 330 wedge anchor bolts offer a safe secure fastening solution for attaching equipment and other materials to concrete in corrosive environments.	--

Alloy 330 Nuts

Hex Nuts	Alloy 330 hex nuts are available in a variety of styles including finished hex nuts, jam nuts and heavy hex nuts.	• ASME B18.16.3 • ASME B18.2.2 • DIN 439 / ISO 4035 • DIN 934 / ISO 4032 • DIN 986




Lock Nuts	Alloy 330 lock nuts are available in all metal and polymer insert styles. All-metal lock provide even load distribution and can be used at high temperatures. Polymer insert styles are more economical and are best for temperatures under than 350°F.	• ASME B18.16.3M • DIN 980 / ISO 7042 / ISO 19513 • DIN 6923 / ISO 4161 • DIN 985 / ISO 10511 / ISO 7040

Alloy 330 Studs & Threaded Rod

Studs	Alloy 330 studs are fully threaded or partially threaded and made to custom lengths.	• ASME B18.31.2 • DIN 976

Threaded Rod	Alloy 330 threaded rod or all thread are available in lengths greater than 1 foot. Minimum order quantity is a total of 6 feet of length.	• ASME B1.1 • DIN 975

Weld Studs	Alloy 330 weld studs are available in both arc or capacitor discharge (CD) styles. Weld studs provide an extremely secure fastening solution when one side of the stud needs to be permanently fix to a part and the other side with the threads accessible.	--

Alloy 330 Washers

Flat Washers	Alloy 330 washers are most commonly offered in SAE sizes, but also availabe in USS, oversized and custom sizes upon request.	• ASME 18.21.1 • SAE / USS • DIN 125 / ISO 7089 / ISO 7090 • DIN 126 / ISO 7091




Lock Washers	Alloy 330 lock washers are offered as split lock washers. Belleville spring lock washers can also be made upon request.	• ASME B18.21.1 • DIN 127 / ISO 7090 • DIN 6796 / ISO 10690

International Standards & Global Designations for Alloy 330

To serve clients worldwide, RAYCHIN LIMITED manufactures Alloy 330 fasteners from material conforming to:

Country / Region	Standard / Specification	Designation / Grade
USA	ASTM B408 / A473 / A276, ASME SB-408	UNS N08330 · Alloy 330
Europe (CEN)	EN 10095, EN 10269 (fasteners)	1.4886 · X12NiCrSi35-16
Germany (DIN)	DIN 17752, DIN 17470 (former)	X12NiCrSi35-16 / 1.4886
Sweden (SS)	—	—
France (NF)	NF A35-572/573 (obsolete)	Z12NCS35.16
China (GB)	GB/T 20878, GB/T 4238	0Cr12Ni35Si16 / 330
ISO	ISO 4955, ISO 13680	X12NiCrSi35-16
NACE	NACE MR0175 / ISO 15156 (consult)	Alloy 330 (not typical for sour but available)

UNS N08330 1.4886 X12NiCrSi35-16 ASTM B408

Chemical Composition (Weight %) – Alloy 330 Austenitic Stainless Steel

Our Alloy 330 bolts, nuts, screws, washers, stud bolts and threaded rods are produced from melts conforming to ASTM B408 / UNS N08330 limits:

Element	ASTM B408 / UNS N08330 Range %	Typical
Carbon (C)	≤ 0.08	0.05
Silicon (Si)	1.00 – 2.00	1.5
Manganese (Mn)	≤ 2.00	1.0
Phosphorus (P)	≤ 0.040	0.020
Sulfur (S)	≤ 0.030	0.010
Chromium (Cr)	18.0 – 21.0	19.0
Nickel (Ni)	33.0 – 37.0	35.0
Iron (Fe)	Balance	Balance

Expert note: The high nickel (34‑37%) and chromium (18‑21%) with silicon (1‑2%) gives Alloy 330 exceptional resistance to oxidation, carburization, and thermal fatigue up to 1150°C (2100°F). Ideal for repeated heating/cooling cycles.

Complete Mechanical Properties of Alloy 330 Fasteners (Solution Annealed)

Alloy 330 fasteners are supplied in the solution annealed condition (1038‑1066°C followed by water quenching). Minimum values per ASTM B408 / A473:

Property	Metric (min)	Imperial (min)
Tensile Strength (Rm)	550 - 750 MPa	80 - 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	8.0 g/cm³	0.289 lb/in³

High Temperature Performance of Alloy 330 Fasteners

Alloy 330 is renowned for its strength and oxidation resistance at elevated temperatures. Typical short-time elevated temperature tensile (0.2% yield strength):

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)

Continuous service temperature up to 1150°C in air (oxidation-limited). Excellent creep rupture strength; data available on request.

Thermal Stability Limits

Maximum Service Temperature (continuous, oxidizing)	1150°C (2100°F)
Solution Annealing Temperature	1038‑1066°C (1900‑1950°F)
Melting Range	1371‑1427°C (2500‑2600°F)
Thermal Conductivity (at 500°C)	21 W/m·K
Coef. of Thermal Expansion (20‑1000°C)	18.5 ×10⁻⁶ /°C

Corrosion Resistance of Alloy 330 Fasteners

Alloy 330 is primarily designed for high‑temperature environments, but it offers good resistance to many corrosive media:

Oxidation: Exceptional resistance in air up to 1150°C due to high chromium and silicon.
Carburization: High nickel content resists carbon absorption in carbon‑rich atmospheres.
Nitriding: Good resistance to ammonia/nitriding gases at elevated temperatures.
Aqueous corrosion: Similar to 310 stainless; resists many organic acids, but not intended for strong reducing acids or chlorides.
Stress corrosion cracking: High nickel provides immunity to chloride SCC in most conditions.

Corrosion Engineering Note: For cyclic oxidation or sulfidation environments, RAYCHIN can advise optimized surface condition. Third‑party testing per ASTM G54 (oxidization) available. Not recommended for seawater or strong chloride solutions – for those we offer 254 SMO or 6% Mo grades.

Special focus: Alloy 330 Fasteners for High‑Temperature & Furnace Applications

For critical applications in heat treating, petrochemical, and power generation, RAYCHIN offers Alloy 330 fasteners to ASTM, ASME, and customer specifications:

Furnace fixtures: radiant tubes, baffles, annealing covers, retorts
Petrochemical: heater supports, tube hangers, pyrolysis assemblies
Power generation: boiler damper seals, burner nozzles, sootblower components
Standards: UNC/UNF, metric coarse/fine, UNJ, MJ threads
Surface treatments: passivation, high‑temp anti‑seize coatings
Traceability: EN 10204 3.1/3.2, third‑party (DNV, Lloyds, TÜV) available
Custom: non‑standard lengths, head configurations, special undercut studs

All Alloy 330 fasteners are supplied with full material traceability and positive material identification (PMI).

Why RAYCHIN LIMITED – The Alloy 330 Fastener Authority

Metallurgical competence

Engineers with deep expertise in high‑temperature alloys. We ensure proper solution annealing and rapid quenching for optimal high‑temperature strength across all Alloy 330 bolts, nuts, screws, washers, stud bolts & threaded rods. Every heat verified.

Global approvals & traceability

ISO 9001:2015, AS9100D; compliance with NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS. Full traceability from melt to final packaging (EN 10204 3.1/3.2). Third‑party inspections available.

Extensive inventory & rapid delivery

We stock Alloy 330 hex bolts (M6–M100), heavy hex nuts, flat washers, continuous thread rods in many sizes. 24/7 support for emergency shutdowns.

Custom solutions

CNC turning and thread rolling for short runs. Special coatings (high‑temp anti‑seize, silver plating). Testing per high‑temperature requirements.

Contact the Alloy 330 fastener experts today

Request a quote for Alloy 330 bolts, nuts, screws, washers, stud bolts & threaded rods – any global standard (NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS), any quantity. Inquire about high‑temperature furnace applications.

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