How does Alloy C22 differ from stainless steel?

Unlike stainless steel, Alloy C22 is a nickel-based alloy with significantly higher molybdenum and chromium levels, giving it superior performance in oxidizing acids, chloride environments, and mixed-acid conditions where stainless steels fail. The addition of tungsten further enhances its resistance to pitting and crevice corrosion.

Is Hastelloy C22 suitable for seawater applications?

Yes. Hastelloy C22 has superior resistance to chloride-induced pitting and crevice corrosion, making it an excellent material for seawater handling systems, desalination equipment, and marine heat exchangers.

Hastelloy C22 Plates & Sheets Supplier Mumbai, India

Name: Jade Special Metals
Address: 199/201 Siddesh Darshan, 10th Khetwadi, Mumbai, Maharashtra, 400004, IN
Telephone: +91 9987685906

What is Hastelloy C22 — UNS N06022 | Werkstoff Nr. 2.4602?

Hastelloy C22 (UNS N06022, Werkstoff Nr. 2.4602) is a nickel-chromium-molybdenum-tungsten alloy per ASTM B575, carrying 20–22.5% Cr, 12.5–14.5% Mo, and 2.5–3.5% W. The tungsten addition absent from Hastelloy C276 maintains passivity in oxidizing acids, mixed-acid media, and wet chlorine environments where 316L stainless steel and even Hastelloy C276 suffer accelerated attack. Chemical plant operators select C22 specifically where nitric acid concentration exceeds 30% or when hydrochloric acid and oxidizing chlorides co-exist in the same process stream.

Jade Alloys holds ready stock in 14 sheet thicknesses (0.4 mm to 6.0 mm) and 13 plate thicknesses (8 mm to 120 mm), dispatched within 3 working days from our Khetwadi, Mumbai warehouse.

Alloy Identity — Quick Reference

ASTM Standard	B575 / ASME SB-575
UNS Number	N06022
Werkstoff Nr.	2.4602
JIS	NW 6022
EN Designation	NiCr21Mo14W
HS Code (Export)	75062000
Density	8.69 g/cm³ (0.314 lb/in³)
Max Service Temp (continuous)	677 °C (1,250 °F)
Max Service Temp (intermittent)	1,093 °C (2,000 °F)

Hastelloy C22 Sheets & Plates Full Specification (ASTM B575 / UNS N06022)

Standard	ASTM B575 / ASME SB-575 / UNS N06022
Foil Thickness	Below 0.15 mm
Sheet Thickness	0.15 mm to 6.35 mm (per ASTM B575)
Plate Thickness	Above 6.35 mm up to 120 mm
Width	1000 mm, 1219 mm, 1500 mm, 2000 mm & custom widths
Length	2000 mm, 2440 mm, 3000 mm, 6000 mm & custom lengths
Surface Finish	2B, 2D, BA, No.1, No.4, 8K Mirror, Brushed, Sandblasted, Electroless Nickel Plating
Forms Available	Sheets, Plates, Coils, Foils, Strips, Shim Sheets, Perforated Sheets, Chequered Plates, Circles, Rings
Hardness (annealed sheet)	Rockwell B 90
Hardness (plate)	Rockwell B 95
Mill Test Certificate	EN 10204 3.1 (standard) \| 3.2 third-party on request
Edges	Round, Rolled, Slit, Square
HS Code	75062000

Note: Per ASTM B575 — Foil = below 0.15 mm | Sheet = 0.15 mm to 6.35 mm | Plate = above 6.35 mm thick.
See also: Metal Weights Calculator

Hastelloy C22 Chemical Composition (ASTM B575 / UNS N06022)

The composition below gives Hastelloy C22 its layered corrosion defence. Tungsten (W) at 2.50–3.50% is the critical differentiating element versus Hastelloy C276 (which contains no tungsten) — this addition delivers superior performance in mixed-acid and chlorinated service.

Grade	C (max)	Mn (max)	Si (max)	S (max)	P (max)	Co (max)	Ni	Cr	Fe	Mo	W
C22 / N06022	0.010	0.50	0.08	0.02	0.02	2.50	Balance	20.0–22.5%	2.0–6.0%	12.5–14.5%	2.50–3.50%

W = Tungsten. This element is absent from Hastelloy C276 (N10276) — it is the primary reason C22 outperforms C276 in oxidizing and mixed-acid environments.

ASTM B575 N06022 Plate Mechanical & Physical Properties

Mechanical Properties of Hastelloy C22 Sheets (ASTM B575 Minimum)

Tensile Strength (min.)	690 MPa (100,000 psi)
Yield Strength 0.2% (min.)	310 MPa (45,000 psi)
Elongation (min.)	45%
Hardness (annealed sheet)	Rockwell B 90
Young’s Modulus	205 GPa (29.7 × 10³ ksi)

Physical Properties of Hastelloy C22 Plates

Density	8.69 g/cm³ (0.314 lb/in³)
Melting Range	1,357 – 1,399 °C (2,475 – 2,550 °F)
Specific Heat	381 J/kg°C (0.091 Btu/lb°F)
Electrical Resistivity	1.215 microhm·m
Thermal Expansion (70–400°F)	6.9 × 10⁻⁶ /°F
Max Service Temp (continuous)	677 °C (1,250 °F)
Max Service Temp (intermittent)	1,093 °C (2,000 °F)

Hastelloy C22 Sheets & Plates Standard Sizes & Thickness Range

Hastelloy C22 (UNS N06022) — Standard Plate & Sheet Dimensions (mm × mm)

1000 × 2000 mm	1219 × 2438 mm (4’×8′)	1500 × 3000 mm	2000 × 2000 mm	2000 × 4000 mm
Standard	Standard	Standard	Standard	Standard / Custom

Hastelloy C22 Sheet Thickness Chart (0.15 mm – 6.35 mm)

Thickness (mm)	Thickness (inches)	Form
0.15 – 0.3 mm	0.006 – 0.012 in	Shim / Foil
0.4 mm	0.01575 in	Sheet
0.5 mm	0.01969 in	Sheet
0.7 mm	0.02756 in	Sheet
0.8 mm	0.03150 in	Sheet
1.0 mm	0.03937 in	Sheet
1.2 mm	0.04724 in	Sheet
1.6 mm	0.06299 in	Sheet
2.0 mm	0.07874 in	Sheet
3.0 mm	0.11810 in	Sheet
4.0 mm	0.15750 in	Sheet
5.0 mm	0.19690 in	Sheet
6.0 mm	0.23620 in	Sheet

Hastelloy C22 Plate Thickness Chart (above 6.35 mm up to 120 mm)

Thickness (mm)	Thickness (inches)
8.0 mm	0.315 in
10.0 mm	0.394 in
12.0 mm	0.472 in
16.0 mm	0.630 in
20.0 mm	0.787 in
25.0 mm	0.984 in
30.0 mm	1.181 in
40.0 mm	1.575 in
50.0 mm	1.969 in
60.0 mm	2.362 in
80.0 mm	3.150 in
100.0 mm	3.937 in
Up to 120 mm	Up to 4.724 in

Thicknesses 12 mm to 120 mm are cut-to-size. Contact us for non-standard combinations.

Hastelloy C22 Sheet & Plate Thickness Tolerances (ASTM B575)

Nominal Thickness Range (mm)	Permitted Variation (mm)
0.15 – 0.25	+0.025 / -0.013
0.25 – 0.51	+0.038 / -0.025
0.51 – 1.27	+0.064 / -0.025
1.27 – 2.54	+0.102 / -0.025
2.54 – 6.35	+0.152 / -0.025
6.35 – 12.7	+0.19 / 0
12.7 – 25.4	+0.25 / 0
Above 25.4	+0.38 / 0

Hastelloy C22 Price Per Kg

Pricing varies by thickness, width, finish, quantity, and current nickel/LME rates. Contact Jade Alloys for a real-time mill-direct quote.

Product Form	India Price (Approx.)	Export Price (Approx.)
Hastelloy C22 Sheet (< 3 mm)	INR 2,800 – 3,200 per kg*	USD 34 – 38 per kg*
Hastelloy C22 Plate (3–12 mm)	INR 3,000 – 3,500 per kg*	USD 36 – 42 per kg*
Hastelloy C22 Coil / Strip	INR 2,600 – 3,000 per kg*	USD 31 – 36 per kg*
Hastelloy C22 Foil (< 0.15 mm)	On request	On request — call +91 9987685906

* Indicative only; actual price varies by thickness, quantity, finish, and current nickel price. Prices updated monthly.

Get a Mill-Direct Price for Hastelloy C22 — Free Quote in 2 Hours

Call / WhatsApp: +91 9987685906 | Email: sales@jadealloys.com Thickness (mm) | Quantity (kg) | Delivery Timeline — include these in your enquiry for fastest response.

Hastelloy C22 Shim Sheets
Hastelloy C22 Circles / Blanks
C22 Hastelloy Plain Sheets (2B / 2D finish)
C22 Hastelloy Alloy Foils (below 0.15 mm)
UNS N06022 Polished Plates (No.4, 8K Mirror)
Werkstoff Nr. 2.4602 Perforated Sheets
ASTM B575 C22 Hastelloy Sheet — Cut to Size
Hastelloy C22 Sheet No.4 Finish
Alloy C22 Cold Rolled Plates

ASTM B575 Type C22 Plate 2B Finish
C22 Hastelloy Plate Mill Finish (No.1)
Hastelloy C22 Hot Rolled Plates (HR)
Alloy C22 No.8 (Mirror) Finish Plates
C22 Hastelloy Laser Cutting Sheet
ASTM B575 Alloy C22 Coils & Slitting Coils
Hastelloy Alloy C22 Strips
Hastelloy C22 Chequered Plates
Hastelloy C22 Rings (Flange Blanks)
DIN 2.4602 Brushed Finish Sheets
Hastelloy C22 Cold Rolled Coil & Strip

Available Stock — Hastelloy C22 Sheets & Plates (ASTM B575 / UNS N06022)

Quality Assurance & Testing

Every Hastelloy C22 sheet and plate from Jade Alloys is tested to the following standards before dispatch. Non-conforming material is returned at our cost. All material supplied with EN 10204 3.1 MTC as standard.

Positive Material Identification (PMI)
Intergranular Corrosion Test (IGC — ASTM A262 Practice E)
Chemical / Spectro Analysis
Mechanical Testing (Tensile, Yield, Elongation, Hardness)
Ultrasonic Testing (UT)
Radiographic Testing (RT)
Dye Penetrant Testing (DPT)
Hydrostatic / Pneumatic Testing
Pitting Resistance Test
Macro / Micro Analysis
Hydrogen-Induced Cracking (HIC — NACE TM0284)
Sulfide Stress Corrosion Cracking (SSC — NACE TM0177)

Certifications Available

EN 10204 3.1 MTC	Standard — supplied with every order. Fully traceable to mill heat and cast number.
EN 10204 3.2 (Third-Party)	Available on request. Add 5–7 working days for witnessed inspection.
ISO 9001:2015	All processes managed under a certified QMS.
Third-Party Agencies	Bureau Veritas, Lloyd’s Register, TÜV, SGS accepted.

ISO 9001:2015 Certified — View our quality certificate

Hastelloy C22 Sheets & Plates — Industries & Applications

Chemical engineers and procurement teams select Hastelloy C22 (UNS N06022) when process chemistry, particularly mixed oxidizing and reducing acids combined with chloride ions, eliminates 316L stainless and even Hastelloy C276 as viable materials.

Chemical Processing	Reactor linings, scrubbers, and heat exchangers in nitric acid, hydrochloric acid, and mixed-acid service. Handles wet chlorine and oxidizing media where C276 is insufficient.
Flue Gas Desulfurization (FGD)	Scrubber bodies, ducts, and dampers in coal-fired power plant FGD systems where high chloride concentrations demand tungsten-bearing alloys.
Pharmaceutical & Biotech	Reactor and vessel linings for nitric acid cleaning cycles at elevated temperatures. ASTM B575 Grade C22 is widely specified in pharma GMP documents.
Oil & Gas / Sour Service	Downhole components, wellhead equipment, and sour gas handling systems where hydrogen sulfide and chlorides co-exist.
Marine & Offshore	Seawater handling systems, desalination equipment, and offshore heat exchangers. Superior chloride pitting resistance over all 300-series stainless grades.
Waste Incineration	Municipal solid waste and spent solvent incineration systems. Resists complex acid-chloride flue gas mixtures at high temperatures.
Power Generation	Condensers, heat exchangers, and scrubber systems where boiler feed water or cooling water has aggressive chemistry.
Food Processing & Biotech	Vessels and heat exchangers requiring high-purity alloys resistant to CIP (clean-in-place) acids and oxidising disinfectants.

Hastelloy C22 Equivalent Grades — International Standards

ASTM / ASME	Werkstoff Nr.	EN Designation	JIS	BS*	Trade Name	Also Known As
UNS N06022 (ASTM B575)	2.4602 (DIN / EN)	NiCr21Mo14W	NW 6022	NA48	Hastelloy® C22 (Haynes International)	Alloy C22, C-22, Nicrofer 5621 hMoW (VDM)

Serving Chemical, Pharma & O&G Industries Globally

Get a spec-compliant Hastelloy C22 quote from Jade Alloys — Call +91 9987685906

WELDING & FABRICATION

Hastelloy C22 is readily weldable by all conventional processes. The low carbon content (0.010% max) eliminates grain-boundary carbide precipitation meaning NO post-weld heat treatment (PWHT) is required, and the material can be put directly into service in the as-welded condition.

Welding Process / Parameter	Details
GTAW (TIG)	Preferred for precision welds, thin sheets, and high-purity applications.
GMAW (MIG)	Suitable for automated welding of medium and heavy plates.
SMAW (Stick)	General-purpose; well-suited for field welding and repair.
SAW (Submerged Arc)	For heavy plates (>12 mm) and high-deposition applications.
Plasma Welding	Suitable for precision overlay and thin-section work.
Filler Metal	ERNiCrMo-10 (AWS A5.14) — matching C22 filler.
Welding Electrode	AWS A5.11 ENiCrMo-10
Post-Weld Heat Treatment	NOT REQUIRED. Carbon is controlled to 0.010% max, preventing grain-boundary carbide precipitation in the weld HAZ. Hastelloy C22 can be placed directly into service in the as-welded condition. Welding procedures are qualified per ASME Section IX.
ASME Qualification	Welding procedures qualified per ASME Section IX.
Sensitisation Range	Avoid prolonged exposure in the 600–1,100 °C range.

Fabrication Services Available

Waterjet Cutting
Laser Cutting
Plasma Cutting
Oxy-Propane Flame Cutting
Shearing
Bending
Polishing
Slitting
Circle Cutting
Edge Deburring & Grinding

HASTELLOY C22 vs C276 — GRADE SELECTION GUIDE

Both C22 (UNS N06022) and C276 (UNS N10276) are nickel-chromium-molybdenum alloys covered under ASTM B575, but they differ meaningfully in composition and application envelope. Use this table to select the correct grade for your process.

Property / Environment	Hastelloy C22 (N06022)	Hastelloy C276 (N10276)
Tungsten content	Yes — 2.50–3.50%	None
Chromium content	20–22.5% (higher)	14.5–16.5%
Molybdenum content	12.5–14.5%	15–17%
Oxidizing acid resistance	Superior	Good
Reducing acid resistance	Good	Superior
Mixed-acid environments	Superior	Good
Wet chlorine / chloride pitting	Superior	Good
Crevice corrosion resistance	Superior	Good
Stress corrosion cracking (SCC)	Superior	Good
Seawater / brine applications	Superior	Good
Strongly reducing HCl service	Good	Superior
Weldability	Excellent (no PWHT)	Excellent (no PWHT)
ASTM Standard	B575	B575

Recommendation

If your process involves oxidizing acids, mixed acids, wet chlorine, or chloride-rich media (seawater, FGD, pharma CIP), choose Hastelloy C22. If your primary challenge is strongly reducing conditions (concentrated HCl, sulfuric acid), Hastelloy C276 is preferred. Contact our technical team with your process chemistry for a definitive recommendation.

Get a Competitive Price for Hastelloy C22 Sheets & Plates

Jade Alloys offers mill-direct pricing with EN 10204 3.1 MTC and 3-day dispatch. Call: +91 9987685906 | WhatsApp: 919987685906 | Contact Us

PACKING, DELIVERY & EXPORT DOCUMENTATION

Packing

All Hastelloy C22 sheets and plates are packed in wooden boxes or metal pallets with moisture-proof VCI polythene wrapping to prevent surface contamination and transit damage. Export packing is available for sea, air, and road freight.

Dispatch Lead Time: Ready stock dispatched within 3 working days from our Mumbai warehouse. Non-standard sizes and EN 10204 3.2 certification add 5–7 working days.

Export Documentation Provided

EN 10204 3.1 / 3.2 Mill Test Certificates
Fumigation Certificate
Packing List & Commercial Invoice
Bill of Lading / Airway Bill
HS Code: 75062000

Countries We Export Hastelloy C22 Sheets & Plates

Jade Alloys is a Hastelloy C22 exporter to 50+ countries. As a Mumbai-based stockist with full export documentation capability, we serve buyers across:

FREQUENTLY ASKED QUESTIONS

What is Hastelloy C22?

Hastelloy C22 is a nickel-chromium-molybdenum-tungsten alloy (UNS N06022, Werkstoff Nr. 2.4602) per ASTM B575. It contains 20–22.5% chromium, 12.5–14.5% molybdenum, and 2.5–3.5% tungsten. The tungsten addition distinguishes it from C276 and provides superior resistance to oxidizing acids, wet chlorine, mixed-acid environments, and chloride-induced pitting and crevice corrosion.

How does Hastelloy C22 differ from stainless steel?

Standard stainless steels such as 304 and 316L fail rapidly in oxidizing acids above dilute concentrations, wet chlorine, mixed-acid media, and seawater pitting environments. Hastelloy C22 contains approximately 58% nickel, 22% chromium, 14% molybdenum, and 3% tungsten, providing 10–100× longer service life in aggressive chemical processing environments.

Which is better — Hastelloy C22 or C276?

It depends on the corrosive media. C22 is superior in oxidizing acid service, mixed-acid environments, wet chlorine, and chloride-induced pitting due to its tungsten content. C276 is preferred for strongly reducing conditions such as concentrated hydrochloric acid and pure sulfuric acid. For FGD systems, seawater service, pharmaceutical acid cleaning, and chlorinated process streams, C22 is generally the stronger choice.

What is the maximum service temperature for Hastelloy C22 plates?

Hastelloy C22 is rated for continuous service up to 677°C (1250°F) and intermittent service up to 1093°C (2000°F).

Can Hastelloy C22 sheets be welded without post-weld heat treatment?

Yes. The carbon content is controlled to 0.010% maximum, which prevents sensitisation in the weld heat-affected zone. Hastelloy C22 can therefore be used in the as-welded condition without PWHT, per ASTM B575 Annex A. Welding procedures are qualified per ASME Section IX using ERNiCrMo-10 filler metal.

What is the price of Hastelloy C22 sheet per kg in India?

Indicative pricing for Hastelloy C22 sheets below 3 mm is approximately INR 2,800–3,200 per kg. Plates from 3–12 mm are approximately INR 3,000–3,500 per kg, while coil and strip products are approximately INR 2,600–3,000 per kg. Actual pricing depends on thickness, quantity, finish, and prevailing LME nickel rates.

What is the HS Code for Hastelloy C22 plates?

The HS Code for Hastelloy C22 sheets and plates (nickel alloy sheets and plates) is 75062000. This code is commonly used for customs clearance and export documentation.

Do you supply Hastelloy C22 with EN 10204 3.2 certification?

Yes. Standard supply includes EN 10204 3.1 Mill Test Certificates. EN 10204 3.2 certification with third-party witnessing is available upon request and typically requires an additional 5–7 working days.

Is Hastelloy C22 suitable for seawater and marine applications?

Yes. Hastelloy C22's high chromium, molybdenum, and tungsten content provides excellent resistance to seawater, brine, and chloride-induced pitting and crevice corrosion. It is widely used in desalination plants, offshore heat exchangers, and seawater handling systems.

What is the minimum order quantity for Hastelloy C22 sheets?

There is no fixed minimum order quantity. Hastelloy C22 sheets and plates can be supplied as cut-to-size pieces for maintenance and R&D requirements as well as large-volume orders for plant construction projects.

What welding processes are recommended for Hastelloy C22 plates?

Hastelloy C22 can be welded using GTAW (TIG) for thin sheets and high-purity applications, GMAW (MIG) for automated plate welding, SMAW (Stick) for field repairs, SAW for heavy plates above 12 mm, and plasma welding for overlays and thin sections. The recommended filler metal is ERNiCrMo-10 (AWS A5.14). No post-weld heat treatment is required because the alloy's low carbon content prevents sensitisation in the heat-affected zone.

Hastelloy C22 Plates