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Alloy 330 Fasteners

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Alloy 330 Washers

Alloy 330 Washers 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 Washers 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 Washers
SKU: 0

Specialist in Alloy 330 Washers · UNS N08330 · 1.4886

Alloy 330 Washers: Flat · Lock · Thrust · Custom

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

RAYCHIN LIMITED is a recognized expert in Alloy 330 washers — from flat washers, spring lock washers, toothed lock washers, thrust washers to fully custom configurations. Engineered for extreme heat environments up to 1150°C, these washers offer exceptional oxidation resistance, carburization resistance, and thermal stability. Our portfolio includes washers in all standard sizes (USS, SAE, oversize) and custom dimensions, punched or machined from solution-annealed bar/plate. Manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN, KS – or custom to your drawing. Precision flatness and chamfers for critical high-temperature sealing applications in furnaces and heat exchangers.

Alloy 330 WashersAlloy 330 flat washersUNS N08330 washers1.4886 washershigh temperature washersfurnace washersAlloy 330 lock washersAlloy 330 thrust washersAlloy 330 spring washersAlloy 330 toothed washersASTM B511 washersX12NiCrSi35-16 washersRA330 washersAlloy 330 sealing washers

Alloy 330 Washers – Full Product Range

Flat Washers

Alloy 330 flat washers in USS, SAE, and oversize patterns. Available in all standard bolt sizes from #2 to 4" (M2 to M100). Punched or machined from solution-annealed bar/plate for uniform oxidation resistance across the entire surface. Precise flatness and deburred edges for critical high-temperature assemblies.

USS patternSAE patternOversizeMetric series

Spring Lock Washers

Alloy 330 spring lock washers (helical spring) provide vibration resistance in high-temperature bolted connections. Manufactured to ASME B18.21.1 standards. Available in all standard sizes with controlled load characteristics at elevated temperatures.

RegularExtra dutyHi-collar

Toothed Lock Washers

Alloy 330 toothed lock washers (internal and external teeth) provide positive locking action through embedded teeth. Ideal for applications where vibration and thermal cycling are present. Available in internal tooth, external tooth, and combination styles.

Internal toothExternal toothCombinationCountersunk

Thrust Washers

Alloy 330 thrust washers for high-temperature bearing surfaces and rotating applications. Precision ground to tight flatness and parallelism tolerances. Available in custom diameters and thicknesses per customer specifications.

Plain thrustFlangedStep bearings

Sealing Washers

Alloy 330 sealing washers with smooth surfaces for high-temperature gasket applications. Available with optional serrations or concentric grooves for enhanced sealing in furnace and heat exchanger assemblies.

Plain sealingSerrated faceGrooved

Custom Washers

Alloy 330 custom washers manufactured to your prints: special diameters, non-standard thicknesses, stepped washers, shims, and precision spacers. CNC machined from solution-annealed bar stock for critical high-temperature applications.

Step washersShimsSpacersSpecial profiles

International Standards & Global Designations for Alloy 330

Our Alloy 330 washers 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 washers 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
Iron (Fe)	Balance	Balance

Expert note: The silicon addition (1.0-1.5%) significantly enhances oxidation resistance and spallation resistance during thermal cycling [citation:1][citation:2]. The high nickel content (34-37%) provides exceptional resistance to carburization and thermal fatigue, making Alloy 330 ideal for washers in cyclic heating/cooling furnace environments [citation:3]. The alloy remains fully austenitic at all temperatures and is not subject to sigma phase embrittlement [citation:4].

Complete Mechanical Properties – Alloy 330 Washers (Solution Annealed)

All washers are supplied from solution-annealed bar or plate (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 Washers

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)
760°C (1400°F)	69
871°C (1600°F)	31
982°C (1800°F)	12

Oxidation resistance: Continuous service in air up to 1150°C (2100°F); excellent resistance to scaling, carburization, and nitriding [citation:5]. The silicon addition enhances oxide spallation resistance during thermal cycling [citation:6].

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
Magnetic permeability	1.02 (essentially non-magnetic)

Corrosion Resistance of Alloy 330 Washers

Alloy 330 offers excellent corrosion resistance in both high-temperature and aqueous environments [citation:7]:

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 [citation:8].
Carburization: High nickel content (34-37%) provides excellent resistance to carbon absorption in carbon-rich atmospheres, making it ideal for furnace components [citation:9].
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 [citation:10].
Thermal shock: Excellent resistance to thermal shock, designed to withstand repeated quenching cycles without cracking or degradation.
Sigma phase resistance: Fully austenitic at all temperatures, resists sigma phase embrittlement even after prolonged high-temperature exposure [citation:4].

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 Stamping & Machining

Our Alloy 330 washers are precision stamped or CNC machined from solution-annealed bar or plate. Flat washers are punched with precision dies to ensure concentricity and flatness. Lock washers are formed and heat-treated to achieve proper spring characteristics. Each lot undergoes dimensional inspection and PMI verification to ensure 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. Dimensional inspection per ASME B18.21.1 and applicable standards.

Alloy 330 Washers – Typical Applications & Industries

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

Furnace fixtures & radiant tubes
Heat treating baskets & retorts
Radiant tube hangers & supports
Annealing covers & muffles
Gas turbine components
Petrochemical heater supports
Boiler damper seals
Salt bath furnace electrodes
Ceramic fiber module attachments
Quench system fixtures
Refractory anchor systems
Exhaust system flanges
Thermal oxidizer internals
Heat exchanger tube sheets

Matching Alloy 330 hex bolts, nuts, and threaded rods available for complete high‑temperature bolting sets.

Why RAYCHIN LIMITED – The Alloy 330 Washer Authority

Metallurgical competence

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

Global approvals & inventory

ISO 9001:2015, AS9100D. Extensive stock of all standard washer types in inch and metric sizes. Fast turnaround for prototypes and emergency shutdowns. 24/7 customer support.

Custom capabilities

Special diameters, non-standard thicknesses, stepped washers, shims, and custom profiles. 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 washer experts today

Request a quote for Alloy 330 washers, flat washers, lock washers, thrust washers – 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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