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Inconel 601 Washers

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Manufacturer, Exporter & Supplier of Inconel 601 Washers

Inconel 601 Washers for High-Temperature & Corrosion-Resistant Industrial Applications

Inconel 601 washers are high-performance fastening components engineered from a nickel-chromium-iron alloy (UNS N06601), specifically designed to maintain structural integrity in extreme thermal and oxidizing environments. These washers are widely used in furnace assemblies, aerospace heat shielding systems, petrochemical processing units, and high-temperature industrial equipment where conventional stainless steel fasteners fail due to scaling or deformation.

Inconel 601 Washers Manufacturer

The alloy composition provides exceptional resistance to oxidation up to approximately 1100°C, along with excellent carburization resistance under cyclic thermal loading. In demanding environments such as heat treatment plants, gas turbine assemblies, and chemical reactors, these washers ensure stable load distribution and long-term joint reliability.

KK Fasteners supplies Inconel 601 washers with controlled dimensional tolerances and full material traceability, serving OEMs and engineering contractors across global industrial markets with consistent quality assurance.

Technical Specification List Of Inconel 601 Washers

Parameter Specification
Material Inconel 601 (Nickel-Chromium-Iron Alloy)
UNS Number N06601
ASTM Standards ASTM B166, ASTM B168
Type Flat Washer, Spring Washer, Lock Washer
Size Range M3 to M64 (Metric) / Custom Inch Sizes Available
Thickness Range 0.5 mm to 10 mm
Inner Diameter As per DIN 125 / DIN 127 / ISO 7089
Outer Diameter Standard DIN/ISO or Custom Requirements
Standards Compliance DIN, ISO 7089, ISO 7090, ASTM, BS, JIS
Surface Finish Solution Annealed, Pickled, Passivated
Hardness 80–95 HRB (Typical Range)
Tensile Strength Approx. 550–700 MPa (Depending on Processing Condition)
Temperature Resistance Up to ~1100°C (Oxidation Resistant)
Manufacturing Process Cold Forging / Precision Stamping / CNC Machining
Inspection & Testing Dimensional Inspection, Hardness Test, Surface Analysis, Material Traceability

Chemical Composition Of Inconel 601 Washers

Grade C Mn Si Fe S Cr Cu Ni
601 min. – – – 6.0 – 14.0 – 72.0
max. 0.15 1.0 0.5 10.0 0.015 17.0 0.5 –

Mechanical Properties Of Inconel 601 Washers

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
601 Psi – 95,000 , MPa -655 Psi – 45,000 , MPa – 310 40 – –

Equivalent Grades of Inconel 601 Washers

Grade UNS No Old British Euronorm GOST Japanese JIS
BS En No AFNOR
Inconel 601 N06601 NA 13 NiCr15Fe 2.4816 NC15FE11M МНЖМц 28-2,5-1,5 NCF 601

Inconel 601 Washers Dimensions

Flat Washers Dimensions
Bolt Size
USS
SAE
OD (in.)
ID (in.)
Thickness
OD (in.)
ID (in.)
Thickness
1/8 (#6)
-
-
-
0.375
0.156
.036/.065
5/32 (#8)
-
-
-
0.438
0.188
.036/.065
3/16 (#10)
0.560
0.250
.036/.065
0.500
0.220
.036/.065
7/32 (#12)
-
-
-
0.562
0.250
.051/.080
1/4 (#14)
0.734
0.312
.051/.080
0.625
0.281
.051/.080
5/16
0.875
0.375
.064/.104
0.688
0.344
.051/.080
3/8
1.000
0.438
.064/.104
0.812
0.406
.051/.080
7/16
1.250
0.500
.064/.104
0.922
0.469
.051/.080
1/2
1.375
0.562
.086/.132
1.062
0.531
.074/.121
9/16
1.469
0.625
.086/.132
1.156
0.594
.074/.121
5/8
1.750
0.688
.108/.160
1.312
0.656
.074/.121
3/4
2.000
0.812
.122/.177
1.469
0.812
.108/.160
7/8
2.250
0.938
.136/.192
1.750
0.938
.108/.160
1
2.500
1.062
.136/.192
2.000
1.062
.108/.160
1 1/8
2.750
1.250
.136/.192
2.250
1.250
.108/.160
1 1/4
3.000
1.375
.136/.192
2.500
1.375
.136/.192
1 3/8
3.250
1.500
.153/.213
2.750
1.500
.136/.213
1 1/2
3.500
1.625
.153/.213
3.000
1.625
.153/.213
1 5/8
3.750
1.750
.153/.213
-
-
-
1 3/4
4.000
1.875
.153/.213
-
-
-
1 7/8
4.250
2.000
.153/.213
-
-
-
2
4.500
2.125
.153/.213
-
-
-
2 1/4
4.750
2.375
.320/.248
-
-
-
2 1/2
5.000
2.625
.210/.280
-
-
-
2 3/4
5.250
2.875
.228/.410S
-
-
-
3
5.500
3.125
.249/.327
-
-
-

Inconel 601 Washers Size Chart

Size
USS
SAE
Inside Diameter
(A)
Outside Diameter
(B)
Thickness
(C)
Inside Diameter
(A)
Outside Diameter
(B)
Thickness
(C)
#2
-
-
-
3/32"
1/4"
0.020"
#4
-
-
-
1/8"
5/16"
0.032"
#6
-
-
-
5/32"
3/8"
0.049"
#8
-
-
-
3/16"
7/16"
0.049"
#10
-
-
-
7/32"
1/2"
0.049"
#12
-
-
-
1/4"
9/16"
0.065"
1/4"
5/16"
0.734"
0.065"
9/32"
5/8"
0.065"
5/16"
3/8"
7/8"
0.083"
11/32"
11/16"
0.065"
3/8"
7/16"
1"
0.083"
13/32"
13/16"
0.065"
7/16"
1/2"
1-1/4"
0.083"
15/32"
15/16"
0.065"
1/2"
9/16"
1-3/8"
0.109"
17/32"
1-1/16"
0.095"
9/16"
5/8"
1-15/32"
0.109"
19/32"
1-5/32"
0.095"
5/8"
11/16"
1-3/4"
0.134"
21/32"
1-5/16"
0.095"
3/4"
13/16"
2"
0.148"
13/16"
1-15/32"
0.134"
7/8"
15/16"
2-1/4"
0.165"
15/16"
1-3/4"
0.134"
1"
1-1/16"
2-1/2"
0.165"
1-1/16"
2"
0.134"
1-1/8"
1-1/4"
2-3/4"
0.165"
-
-
-
1-1/4"
1-3/8"
3"
0.165"
-
-
-
1-3/8"
1-1/2"
3-1/4"
0.180"
-
-
-
1-1/2"
1-5/8"
3-1/2"
0.180"
-
-
-
1-5/8"
1-3/4"
3-3/4"
0.180"
-
-
-
1-3/4"
1-7/8"
4"
0.180"
-
-
-
2"
2-1/8"
4-1/2"
0.213"
-
-
-

Range of Inconel 601 Washers

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Spring Lock Washers

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Plain Flat Washers

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Square Washers

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Square Bevel Washers

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Tab Washers

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External Tooth Lock Washers

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Internal Tab Washers

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Hex Washers

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Bonded Sealing Washers

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Conical Spring Washers

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Countersunk Washers

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Dock Washers

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Fender Washers

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Finishing Washers

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Ogee Washers

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Internal Tooth Lock Washers

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Self Locking Washers

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Wave Washers

Different Types of Inconel 601 Washers

  • Inconel 601 Spring Washers
  • Inconel 601 Machined Washers
  • Inconel 601 Square Washers
  • Inconel 601 Plain Flat Washers
  • Inconel 601 Spring Lock Washers
  • Inconel 601 Tab Washers
  • Inconel 601 Internal Tab Washers
  • Inconel 601 Square Beveled Washers
  • Inconel 601 Hex Washers
  • Inconel 601 External Tooth Lock Washers
  • Inconel 601 Internal Tooth Lock Washers
  • Inconel 601 Curved Wave Washers
  • Inconel 601 Conical Spring Washers
  • Inconel 601 Self Locking Washers
  • Inconel 601 Dock Washers
  • Inconel 601 Fender Washers
  • Inconel 601 Ogee Washers
  • Inconel 601 Sealing Washers
  • Inconel 601 Countersunk Washers
  • Inconel 601 Finishing Washers

Key Technical Features

  • High-Temperature Structural Stability: Maintains mechanical integrity under continuous exposure to elevated temperatures up to ~1100°C, making it suitable for furnace and kiln assemblies.
  • Exceptional Oxidation Resistance: Chromium-rich surface layer prevents scaling and oxidation in cyclic thermal environments such as heat exchangers and burners.
  • Superior Load Distribution: Engineered geometry ensures uniform stress distribution across bolted joints, reducing localized fatigue failure in dynamic systems.
  • Creep Resistance Under Stress: Nickel matrix resists deformation under long-term mechanical loading at elevated temperatures.
  • Dimensional Accuracy: Manufactured within tight tolerances (DIN/ISO compliant), ensuring precise fitment in high-precision assemblies.
  • Chemical Stability: Resists carburization and nitriding, making it suitable for petrochemical and heat treatment industries.
  • Fatigue Resistance: Performs reliably under thermal cycling and vibration-intensive environments such as turbines and engines.

Industry Applications

Inconel 601 washers are used wherever extreme heat, oxidation, and mechanical stress converge. These components are critical in maintaining bolted joint integrity in high-temperature engineering systems.

  • Aerospace Engine Assemblies — Used in turbine housing and exhaust systems where thermal cycling is extreme.
  • Industrial Furnaces & Kilns — Secures refractory panels and heating elements in continuous operation environments.
  • Petrochemical Processing Plants — Applied in reactor vessels and piping systems exposed to corrosive gases.
  • Power Generation Systems — Used in gas turbines and boiler assemblies for thermal stability.
  • Heat Exchangers — Ensures sealing integrity under fluctuating thermal loads.
  • Automotive High-Performance Engines — Used in turbocharger and exhaust manifold assemblies.
  • Chemical Processing Equipment — Supports bolted joints exposed to oxidizing and reducing atmospheres.

Manufacturing & Quality Assurance

The manufacturing process for Inconel 601 washers involves precision stamping or CNC machining followed by controlled heat treatment. Raw alloy billets undergo solution annealing to achieve uniform grain structure before forming operations. Each washer is then processed to ensure dimensional accuracy and surface integrity.

Quality control includes hardness testing, tensile verification, and microscopic inspection for surface defects. Lot traceability is maintained throughout production, ensuring compliance with ASTM B166 requirements. KK Fasteners implements multi-stage inspection protocols, including automated dimensional checks and manual verification for critical orders. Certifications such as ISO 9001:2015, RoHS, and REACH compliance support global industrial procurement requirements.

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Send us your Requirement for Inconel 601 Washers

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Inconel 601 Washers - FAQs

Inconel 601 washers are high-performance fastening components made from a nickel-chromium-iron alloy (UNS N06601). They are designed for extreme heat and oxidation resistance, commonly used in furnaces, turbines, petrochemical plants, and aerospace systems where standard stainless steel washers fail under thermal stress.

Inconel 601 contains a balanced composition of nickel and chromium that forms a stable oxide layer at high temperatures. This protective layer prevents scaling and degradation, allowing the washers to perform reliably in continuous service up to approximately 1100°C.

These washers are generally manufactured in compliance with ASTM B166 and ASTM B168 standards. Depending on application requirements, they also conform to DIN, ISO 7089, ISO 7090, BS, and JIS standards to ensure global compatibility and interchangeability.

They are widely used in industrial furnaces, heat treatment equipment, gas turbines, chemical processing plants, power generation systems, and aerospace engines. Their primary role is to maintain joint integrity in high-temperature and oxidizing environments.

A reliable supplier should offer certified raw materials, ASTM-compliant manufacturing, full traceability, and strict quality inspection processes. Global export capability and technical support are also important. KK Fasteners supplies engineered Inconel 601 washers with consistent quality control for industrial applications worldwide.

Inconel 601 Washers - Export Destination

Inconel 601 Washers Supplier in North America
Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States.
Inconel 601 Washers Supplier in South America
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.
Inconel 601 Washers Supplier in Europe
Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic (Czechia), Denmark, Estonia, Finland, France, Germany, Greece, Holy See, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom.
Inconel 601 Washers Supplier in Asia
Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, Cyprus, Georgia, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Laos, Lebanon, Malaysia, Maldives, Mongolia, Myanmar, Nepal, Oman, Pakistan, Palestine, Philippines, Qatar, Saudi Arabia, Singapore, South Korea, Sri Lanka, State of Palestine, Syria, Taiwan, Tajikistan, Thailand, Timor-Leste, Turkey, Turkmenistan, United Arab Emirates, Uzbekistan, Vietnam, Yemen.
Inconel 601 Washers Supplier in Australia
Australia, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu.

For high-temperature and oxidation-critical applications, Inconel 601 washers deliver long-term reliability where conventional alloys fail. With controlled manufacturing and strict quality validation, KK Fasteners supports global industries with engineered fastening solutions tailored for extreme environments.

Contact the engineering team today to request a technical datasheet or customized quotation for your project requirements.

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