Home > Alloys > Hastelloy > Hastelloy C-22

Nickel Alloy Grade Data Sheet

Hastelloy C-22

Hastelloy C-22 is a versatile nickel-chromium-molybdenum-tungsten alloy designed for resistance to both oxidizing and reducing chemical environments. Its high chromium content improves performance in oxidizing media, while molybdenum and tungsten provide strong resistance to pitting, crevice corrosion and stress corrosion cracking. Alloy C-22 is widely specified for chemical processing, pharmaceutical production, pollution control, pulp and paper equipment, waste treatment and systems handling contaminated or variable process streams.

 

 

 

Download Hastelloy C-22 Datasheet Send Inquiry
Material Overview

Hastelloy C-22 material profile

A concise grade introduction for buyers who need to confirm composition, properties, standards, available forms and suitable applications before sending an inquiry.

Engineering profile

Hastelloy C-22 is a versatile nickel-chromium-molybdenum-tungsten alloy designed for resistance to both oxidizing and reducing chemical environments. Its high chromium content improves performance in oxidizing media, while molybdenum and tungsten provide strong resistance to pitting, crevice corrosion and stress corrosion cracking. Alloy C-22 is widely specified for chemical processing, pharmaceutical production, pollution control, pulp and paper equipment, waste treatment and systems handling contaminated or variable process streams.

 

 

 

Hastelloy C-22

Technical data on this page is for material selection reference. Final acceptance values should be confirmed by the purchase standard, heat treatment condition, product form, size and material test certificate.

Chemical Composition

Hastelloy C-22 composition range

The following table shows common limiting composition values for Alloy 625 / UNS N06625. Actual product chemistry is reported by heat on the material test certificate.

Element Symbol Typical Requirement Role in Alloy C-22
Nickel Ni Balance Forms the corrosion-resistant alloy base and provides metallurgical stability.
Chromium Cr 20.0-22.5 Provides strong resistance to oxidizing chemicals and supports passive-film formation.
Molybdenum Mo 12.5-14.5 Improves resistance to reducing acids, pitting and crevice corrosion.
Iron Fe 2.0-6.0 Balances the alloy matrix and contributes to metallurgical stability.
Tungsten W 2.5-3.5 Strengthens resistance to localized corrosion in chloride-bearing media.
Cobalt Co 2.50 max Controlled residual and minor alloying element.
Manganese Mn 0.50 max Controlled minor element and deoxidizer.
Vanadium V 0.35 max Controlled minor alloying element.
Copper Cu 0.50 max Controlled residual element.
Carbon C 0.015 max Restricted to minimize carbide precipitation and preserve weld-zone corrosion resistance.
Silicon Si 0.080 max Restricted to reduce formation of harmful intermetallic phases during welding.
Phosphorus P 0.020 max Controlled impurity for consistent fabrication and corrosion performance.
Sulfur S 0.020 max Restricted impurity for improved hot workability and weld quality.

 

 

Physical Properties

Key physical and thermal data

These values help customers compare density, thermal behavior, magnetic response and conductivity during early material selection.

Property Metric Value Imperial / Notes Condition
Density 8.69 g/cm3 0.314 lb/in3 Room temperature
Melting Range 1357-1399 °C 2475-2550 °F Typical range
Specific Heat Approx. 414 J/kg·°C Approx. 0.099 Btu/lb·°F Approx. 20 °C
Thermal Conductivity Approx. 10.1 W/m·°C Approx. 70 Btu·in/ft2·h·°F Approx. 20 °C
Electrical Resistivity Approx. 114 µΩ·cm Approx. 686 ohm-cmil/ft Approx. 20 °C
Modulus of Elasticity Approx. 206 GPa Approx. 29.9 x 103 ksi Solution annealed, room temperature
Mean Thermal Expansion Approx. 12.4 µm/m·°C Approx. 6.9 µin/in·°F 20-100 °C
Magnetic Permeability Approx. 1.001 Essentially non-magnetic Solution annealed, room temperature

 

 

Mechanical Properties

Room-temperature mechanical properties

Mechanical properties vary with product form, size, processing route and heat treatment. The table below summarizes commonly referenced nominal values for material selection.

Product Form / Condition Tensile Strength Yield Strength, 0.2% Elongation Hardness
Plate, sheet and strip – solution annealed 690 MPa min 310 MPa min 45% min By specification
Rod and bar – solution annealed 690 MPa min 310 MPa min 45% min By specification
Rod and bar – cold worked 825-1100 MPa 550-900 MPa 15-30% Condition dependent
Seamless pipe and tube – solution annealed 690 MPa min 310 MPa min 45% min By specification
Wire – annealed 690-900 MPa 310-500 MPa 30-45% By size and condition
Forgings and rings – solution annealed 690 MPa min 310 MPa min 30% min By specification

 

 

For pressure equipment, aerospace parts or project-specific acceptance, use the minimum requirements in the specified ASTM, ASME, AMS, EN or customer drawing rather than nominal values.

Standards & Specifications

Common Hastelloy C-22 standards by product form

YSN128 can quote Alloy 625 products according to ASTM, ASME, AMS, EN, DIN, ISO or customer drawing requirements. Certificate scope can be matched to the purchase order.

Product Form Common Standards Typical Supply Item Certificate / Inspection
Plate, Sheet, Strip ASTM B575 / ASME SB575 Hot rolled plate, cold rolled sheet, strip and cut blanks EN10204 3.1, chemical analysis and mechanical testing
Rod and Bar ASTM B574 / ASME SB574 Round bar, rod, machined bar and cut lengths MTC, PMI, tensile testing and dimensional inspection
Seamless Pipe & Tube ASTM B622 / ASME SB622 Seamless pipe, process tube and heat-exchanger tube Hydrostatic test, eddy-current test and MTC
Welded Pipe ASTM B619 / ASME SB619 Longitudinally welded pipe and fabricated process piping Radiographic or ultrasonic inspection, hydrotest and MTC
Welded Tube ASTM B626 / ASME SB626 Welded process tube and heat-exchanger tube Eddy-current test, hydrostatic or pneumatic test and MTC
Forgings and Flanges ASTM B462 / ASME SB462 Rings, discs, blocks, flanges and custom forgings Heat-treatment record, ultrasonic testing, PMI and MTC
Fittings ASTM B366 / ASME SB366 Elbows, tees, reducers, caps and drawing-based fittings PMI, dimensional inspection, penetrant testing and MTC
Welding Products AWS A5.14 ERNiCrMo-10, AWS A5.11 ENiCrMo-10 Matching welding wire, bare electrodes and covered electrodes Chemical analysis, mill certificate and dimensional inspection

 

 

Available Product Forms

Hastelloy C-22 supply range

Review available product forms, size ranges, standards and delivery options for this alloy.

Form Common Size Range Delivery Condition Typical Applications Page Link
Pipe & Tube OD 6-762 mm, wall thickness or schedule to specification Seamless or welded, solution annealed, pickled or bright annealed Chemical piping, pharmaceutical systems, heat exchangers and waste-treatment equipment View Pipe & Tube
Round Bar Diameter 3-500 mm, custom cut lengths available Hot rolled, forged, solution annealed, peeled or polished Pump shafts, valve parts, fasteners and machined corrosion-resistant components View Round Bar
Sheet & Plate Thickness 0.5-150 mm, custom widths and lengths Hot rolled, cold rolled, solution annealed, pickled or polished Process vessels, reactors, scrubbers, tanks and pollution-control equipment View Sheet & Plate
Strip & Foil Thickness 0.02-5 mm, precision slit widths available Cold rolled, solution annealed, bright finished or coil supplied Corrosion-resistant seals, liners, diaphragms and precision formed parts View Strip & Foil
Wire Diameter 0.1-20 mm, coil, spool or straight-length supply Cold drawn, solution annealed, bright or pickled Wire mesh, demister pads, springs and welding-product manufacture View Wire
Fasteners Standard and custom bolts, nuts, screws, studs and washers Solution annealed, machined, rolled thread or custom finished Chemical plants, pharmaceutical equipment, scrubbers and waste-treatment systems View Fasteners
Fittings ASME, ANSI, EN and custom drawing dimensions Seamless, welded, formed or machined, solution annealed Mixed-acid piping, chlorine systems and chemical process lines View Fittings
Flanges ASME B16.5, ASME B16.47, EN and custom large-diameter designs Forged, solution annealed, machined and inspected Severe chemical piping, pressure vessels and pollution-control systems View Flanges
Forgings Rings, discs, blocks and shafts up to 2000 mm or drawing requirements Open-die or closed-die forged, solution annealed and machined Pump components, valve bodies, pressure parts and custom chemical equipment View Forgings
Welding Wire Diameter 0.8-4.0 mm, spool, coil or straight length Precision drawn, clean bright finish and controlled chemistry Joining Alloy C-22, dissimilar-metal welding and corrosion-resistant overlay View Welding Wire

 

 

Material Selection Guide

When to consider Hastelloy C-22

This guide helps buyers connect service conditions with the typical advantage of Alloy 625. Final selection should consider medium concentration, temperature, pressure, fabrication, availability and budget.

Service Requirement Why Alloy C-22 Helps Common Product Form Buyer Note
Mixed oxidizing and reducing chemicals The balanced chromium, molybdenum and tungsten contents provide resistance across a wide range of process conditions. Plate, pipe, tube, fittings and process vessels Provide the complete chemistry for normal operation, cleaning, start-up and shutdown.
Pitting and crevice corrosion Molybdenum and tungsten provide strong resistance to localized attack in chloride-bearing media. Pipe, tube, sheet, plate, fittings and fasteners Check chloride concentration, temperature, deposits and crevice geometry.
Oxidizing acid environments The relatively high chromium content improves resistance to oxidizing acids and contaminated chemical streams. Pipe, tube, plate, fittings and heat exchangers Specify acid concentration, temperature, aeration and impurities.
Pharmaceutical and fine-chemical equipment Broad corrosion resistance supports service where process chemistry and cleaning media can vary. Sheet, plate, tube, fittings and fabricated vessels Specify surface finish, cleaning procedure and product-contact requirements.
Pollution-control and waste systems Alloy C-22 resists many acidic condensates and contaminated streams containing chlorides. Plate, pipe, ducting, scrubber components and fittings Confirm condensate chemistry, dew-point conditions, deposits and erosion risk.
Welded corrosion-resistant equipment Low carbon and silicon contents help maintain corrosion resistance in welded structures. Plate, sheet, pipe, tube and welding wire Control cleanliness, heat input, interpass temperature and final inspection.

 

 

Why Choose Us

Supply and quality support for Hastelloy C-22

For ranking traffic, buyers need more than a data sheet. This section gives clear trust signals for procurement, engineering and quality teams.

STASTM / ASME / AMS / EN

Quotation can be matched to project standards and product form specifications.

MTEN10204 3.1 MTC

Heat number, chemistry, mechanical properties and inspection records can be supplied.

QCPMI & Inspection

PMI, UT, dimensional inspection, visual inspection and packing check are available.

CSCustom Size

Cutting, machining allowance, rough machining and drawing-based supply can be arranged.

EPExport Packing

Wooden case, bundle, waterproof protection and international shipping documents.

RFFast Technical Reply

Send grade, size, standard, quantity and destination for a practical quotation route.

Related Nickel Alloys

Compare nearby grades and product forms

Explore related grades and product forms for comparison.

FAQ

Hastelloy C-22 questions from buyers

Find practical answers about procurement, standards, fabrication and industrial applications.

Hastelloy C-22 is used for chemical processing, pharmaceutical equipment, pollution control, pulp and paper systems, waste treatment, heat exchangers and equipment handling variable or contaminated chemical streams.

Yes. UNS N06022 is the standardized UNS designation for Hastelloy C-22. The alloy may also be identified as Alloy C-22, Nickel Alloy C-22, W.Nr. 2.4602 or NiCr21Mo14W.

Alloy C-22 contains more chromium and generally provides stronger resistance in many oxidizing environments. Alloy C-276 contains more molybdenum and may be preferred for certain strongly reducing conditions. Final selection should be based on the complete chemical composition and temperature.

YSN128 can quote plate, sheet, strip, round bar, rod, wire, seamless pipe, welded pipe, tube, forgings, flanges, fittings, fasteners and welding wire. Cutting, forming, machining and drawing-based production can also be discussed.

Common specifications include ASTM B575 for plate and sheet, ASTM B574 for rod and bar, ASTM B622 for seamless pipe and tube, ASTM B619 for welded pipe, ASTM B626 for welded tube, ASTM B462 for forgings and ASTM B366 for fittings.

Yes. Alloy C-22 has good weldability using suitable nickel-alloy procedures. Matching filler metals such as ERNiCrMo-10 may be used with clean joint surfaces, controlled interpass temperature and the required inspection.

Alloy C-22 has excellent resistance to pitting, crevice corrosion and stress corrosion cracking in many chloride-bearing environments. Performance still depends on chloride concentration, temperature, oxidizing potential and crevice conditions.

Please send the product form, dimensions, quantity, applicable ASTM or ASME standard, delivery condition, inspection requirements, destination and service temperature. Process chemistry and cleaning conditions should also be provided when corrosion suitability must be reviewed.

Request Hastelloy C-22 Quote

Need Hastelloy C-22 price, stock or technical support?

Send your required grade, product form, size, quantity, standard, certificate and destination. We will help check availability, production route, inspection scope and practical delivery plan.

Email RFQ

Home Tel Mail Inquiry