HIGH NICKEL / EXOTIC ALLOY FASTENERS

Hastelloy C22 Threaded Fasteners | UNS N06022

Hastelloy C22 Threaded Fasteners for severe corrosive and demanding industrial applications. Aanuraj supplies C22 hex bolts, full threaded studs, nuts, washers and custom fasteners in metric and inch sizes.

Hastelloy C22 UNS N06022 ASTM B574 Material Basis Custom Sizes MTC Available

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Hastelloy C22 / UNS N06022

Industrial & Corrosion-Resistant Fasteners

Technical Support & MTC

Technical Contents

Overview Features Chemistry Mechanical Solution Annealing Standards Dimensions Applications Why Aanuraj Enquiry

1. Hastelloy C22 Threaded Fasteners - Technical Overview

Hastelloy C22, UNS N06022, is a nickel-chromium-molybdenum-tungsten alloy developed for severe corrosive environments.

For fastener applications, suitable C22 rod/bar material can be specified to ASTM B574. Finished bolts, studs, nuts and washers should additionally be defined by the applicable dimensional, thread, testing and purchase requirements.

UNS N06022Material identification

690 MPaTensile minimum

310 MPaYield minimum

45%Elongation minimum

2. Key Features of Hastelloy C22 Threaded Fasteners

Oxidizing & Reducing Media
Strong resistance across many aggressive oxidizing and reducing chemical environments.

Pitting & Crevice Resistance
High chromium and molybdenum support resistance to localized corrosion.

Stress-Corrosion Resistance
Selected for demanding environments where SCC resistance is important.

High Nickel Alloy
Nickel-based metallurgy provides broad corrosion resistance.

Low Carbon
Low carbon chemistry supports corrosion performance after fabrication.

Custom Fasteners
Metric, inch and drawing-specific configurations can be supplied.

3. Hastelloy C22 Chemical Composition | UNS N06022

Element	Requirement, wt.%	Engineering role
Nickel (Ni)	Balance	Base alloy matrix.
Chromium (Cr)	20.0 - 22.5	Oxidizing-media and localized corrosion resistance.
Molybdenum (Mo)	12.5 - 14.5	Pitting, crevice and reducing-environment resistance.
Tungsten (W)	2.5 - 3.5	Supports localized corrosion resistance.
Iron (Fe)	2.0 - 6.0	Controlled alloy constituent.
Cobalt (Co)	2.5 max.	Controlled alloy/residual element.
Carbon (C)	0.01 max.	Low carbon supports corrosion performance.
Manganese (Mn)	0.50 max.	Controlled processing element.
Silicon (Si)	0.08 max.	Controlled residual.
Vanadium (V)	0.35 max.	Controlled minor element.
Copper (Cu)	0.50 max.	Controlled minor element.
Phosphorus (P)	0.04 max.	Controlled impurity.
Sulfur (S)	0.03 max.	Controlled impurity.

4. Hastelloy C22 Mechanical & Physical Properties

Property	Reference value	Basis
Tensile Strength	690 MPa / 100 ksi minimum	ASTM B574, solution-annealed rod/bar
Yield Strength, 0.2%	310 MPa / 45 ksi minimum	ASTM B574, solution-annealed rod/bar
Elongation	45% minimum	ASTM B574, solution-annealed rod/bar
Density	Approx. 8.69 g/cm3	Typical C22 physical data
Elastic Modulus	Approx. 206 GPa	Typical C22 physical data
Thermal Conductivity	Approx. 10.1 W/m.K at 50 C	Typical C22 physical data
Specific Heat	Approx. 414 J/kg.K at 50 C	Typical C22 physical data
Melting Range	Approx. 1357 - 1399 C	Typical C22 physical data

Important: ASTM B574 is a material specification for suitable rod/bar. These values should not be treated as a universal finished-fastener strength class.

5. Hastelloy C22 Solution Annealing & Quenching

Solution Annealing Temperature
2050 F / 1121 C is the Haynes C22 solution heat-treatment reference.

Holding Time
Typically 10-30 minutes after the complete section reaches temperature, depending on thickness.

Cooling
Water quenching is preferred. Rapid air cooling may be used for thin sections where permitted.

After Hot Forming
Re-annealing may be required to restore corrosion resistance and ductility.

After Cold Forming
Re-anneal when the applicable material procedure requires restoration after significant cold work.

Production Control
Record furnace temperature, soak time, thermocouple traceability and cooling method.

6. Hastelloy C22 Fasteners - Standards & Specifications

Requirement	Reference	Purpose
Material - Rod / Bar	ASTM B574 / UNS N06022	Chemistry and solution-annealed material properties.
Forged Components	ASTM B564 where applicable	Nickel-alloy forgings including applicable C22 material.
Hex Bolt Dimensions	ASME B18.2.1 / ISO 4014 / ISO 4017 / DIN 931 / DIN 933	Head, length and dimensional requirements.
Stud Dimensions	ASME B18.31 series / applicable DIN standard	Stud geometry and dimensional requirements.
Nut Dimensions	ASME B18.2.2 / DIN 934 / ISO 4032	Hex and heavy-hex nut dimensions.
Washer Dimensions	ASME B18.21.1 / DIN 125 / ISO 7089	Plain washer dimensions.
Threads	ASME B1.1 for inch / applicable metric thread standard	UNC, UNF or metric pitch and tolerance.

7. Hastelloy C22 Fastener Dimensions - Metric & Inch

Product	Metric	Inch	Typical dimensional reference
Hex Bolts	M8 - M64	1/4" - 2.5"	ISO 4014/4017, DIN 931/933, ASME B18.2.1
Full Threaded Studs	M8 - M48	3/8" - 2.5"	Applicable stud standard / customer drawing
Hex Nuts	M8 - M48	1/4" - 3"	DIN 934, ISO 4032, ASME B18.2.2
Plain Washers	M8 - M48	1/4" - 3"	DIN 125, ISO 7089, ASME B18.21.1

8. Thread Specifications - Metric & Inch

Metric Coarse Pitch

M8 - 1.25 | M10 - 1.50 | M12 - 1.75
M14 - 2.00 | M16 - 2.00 | M18 - 2.50
M20 - 2.50 | M22 - 2.50 | M24 - 3.00
M27 - 3.00 | M30 - 3.50 | M36 - 4.00
M42 - 4.50 | M48 - 5.00

Inch UNC / UNF Reference

1/4" - 20 UNC / 28 UNF
3/8" - 16 UNC / 24 UNF
1/2" - 13 UNC / 20 UNF
5/8" - 11 UNC / 18 UNF
3/4" - 10 UNC / 16 UNF
1" - 8 UNC / 12 UNF
1-1/4" - 7 UNC / 12 UNF
1-1/2" - 6 UNC / 12 UNF
2" - 4-1/2 UNC / 8 UNF

9. Hastelloy C22 Corrosion Resistance & Material Advantages

Oxidizing Environments
High chromium supports resistance in oxidizing process environments.

Reducing Environments
Nickel and molybdenum support resistance in many reducing chemical environments.

Chloride Service
High Mo and Cr contribute to pitting and crevice corrosion resistance.

Mixed Chemistry
C22 is selected where process chemistry can vary between oxidizing and reducing conditions.

Critical Bolting
Useful where conventional stainless fasteners may not provide sufficient corrosion resistance.

Custom Engineering
Suitable for project-specific sizes, lengths and thread configurations.

10. Hastelloy C22 Fasteners - Applications & Industries

Chemical Processing
Reactors, vessels, piping, flanges and aggressive chemical service.

Petrochemical & Oil & Gas
Corrosive process systems and critical bolted joints.

Pollution Control
Scrubbers, flue-gas systems and waste-treatment equipment.

Pharmaceutical
Process equipment exposed to aggressive chemicals and cleaning conditions.

Marine & Process
Chloride-rich and mixed-corrosion environments.

Power & Industrial
High-corrosion equipment and demanding maintenance applications.

11. Why Aanuraj for Hastelloy C22 Threaded Fasteners?

High-Nickel Expertise
Experience with Hastelloy, Inconel, Monel, stainless, duplex and exotic grades.

Material Traceability
Heat-wise identification, PMI and MTC-linked documentation as required.

Manufacturing Capability
Hot forging, CNC machining, thread rolling and inspection support.

Custom Sizes
Metric, inch and drawing-specific diameters, lengths and thread configurations.

Technical Support
Support for grade selection, corrosion environment, dimensions and heat treatment.

Industrial Supply
Chemical, petrochemical, oil & gas, marine and process industries.

Need Hastelloy C22 Threaded Fasteners?

Send your size, quantity, thread standard, drawing or application requirement to Aanuraj for technical review and quotation.

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Hastelloy C22 Fasteners - Technical & SEO Keywords

Primary: Hastelloy C22 Threaded Fasteners, Hastelloy C22 Fasteners, UNS N06022 Fasteners, ASTM B574 C22 Fasteners.

Products: Hastelloy C22 Bolts, C22 Hex Bolts, Hastelloy C22 Studs, C22 Threaded Studs, Hastelloy C22 Nuts, C22 Washers, N06022 Bolts, N06022 Studs, N06022 Nuts.

Industries: Chemical Industry Fasteners, Petrochemical Fasteners, Oil and Gas Fasteners, Pollution Control Fasteners, Pharmaceutical Fasteners, Marine Fasteners, High Nickel Fasteners, Exotic Alloy Fasteners.

Technical reference note: ASTM B574 covers suitable low-carbon nickel alloy rod/bar including UNS N06022. Finished fastener dimensions, threads and acceptance requirements should be specified separately by the applicable fastener standard, drawing and purchase specification. Verify the current applicable standard and MTC before certification.