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Location: HOME > PRODUCTS > High-quality alloy > Corrosion-resistant Alloy > Hastelloy C-22(UNS N06022) Ni-Cr-Mo-W Super Corrosion-resistant Alloy

Hastelloy C-22(UNS N06022) Ni-Cr-Mo-W Super Corrosion-resistant Alloy

Hastelloy C-22 is a Ni-Cr-Mo-W super corrosion-resistant alloy (solution-strengthened type). It is an upgraded version of the C-series all-around corrosion-resistant material. In oxidizing/reducing mixed acid, chloride ion-containing, and high-temperature corrosive environments, its comprehensive corrosion resistance is superior to C-276. It has extremely strong resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking, making it the preferred material for harsh chemical, marine, environmental, and nuclear power applications.

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Name	Corrosion-resistant Alloys
Thickness	Common thickness	0.5–6 mm (for stamping, bending, household appliances / automotive parts)
	Medium-thick specification	6–20 mm (for steel structures, mechanical bases)
	Thick specification	20–100 mm (for heavy-duty frames, pressure vessels)
Tolerance	±0.02–±0.10 mm (varies with thickness)
Width	1000、1219、1250、1500、1800、2000
Length	plate/sheet:2000、2500、3000、6000、12000mm	Coil:Single roll weight: 8 to 25 tons
Material Standards	AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, SAE, etc.
Delivery Condition	AR / As Rolled ，TMCP / Thermo-Mechanical Controlled Process ，N / Normalized，NR / Normalized Rolled ，CR / Controlled Rolling
Surface treatment	Pickling and passivation, sandblasting, polishing (including mechanical polishing and chemical polishing, achieving a surface finish of Ra≤0.8μm), annealing.
Delivery status	Solution-treated and aged (ST) state, cold-rolled/hot-rolled state
Delivery Time	within 5-10 days(Special specifications will take 15 to 20 days)

Hastelloy C-22 is a Ni-Cr-Mo-W super corrosion-resistant alloy (solution-strengthened type), an upgraded version of the C-series all-around corrosion-resistant material. In oxidizing/reducing mixed acids, chloride-containing environments, and high-temperature corrosive environments, its overall corrosion resistance is superior to C-276. It exhibits extremely strong resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking, making it the preferred material for harsh chemical, marine, environmental, and nuclear power applications.

Common Applications: Chemical & Petrochemical: Mixed acid reactors, heat exchangers, absorption towers, PTA equipment, acetic acid/sulfuric acid units

Flue Gas Desulfurization (FGD): Scrubbers, spray pipes, demisters, high-sulfur flue gas treatment components

Marine Engineering: Seawater desalination, deep-sea oil and gas pipelines, offshore platforms, salt spray corrosion-resistant structural components

Pharmaceutical/Food: FDA/ASME BPE compliant, high-sanitary-grade reactors, pipelines

Energy & Environmental Protection: Waste incineration, nuclear fuel regeneration, acid washing equipment, high-temperature and high-pressure corrosion-resistant containers

Oil & Gas Extraction: Acidic gas fields (H₂S + CO₂ + Cl⁻) downhole tools, wellheads, valves

United States UNS/ASTM	China GB	Germany W.Nr./DIN	United Kingdom BS	France AFNOR	Japan JIS
N06022	NS3308	2.4602	NiCr21Mo14W	NA46	NW6022
Hastelloy C-22	00Cr22Ni60Mo13W3	NiCr21Mo14W	NiCr21Mo14W	NA46	NW6022

Chemical composition (mass fraction, %)

Element

Content

Margin

20.0~22.5

12.5~14.5

2.5~3.5

2.0~6.0

≤2.5

≤0.015

≤0.5

≤0.08

≤0.02

≤0.025

≤0.35

Mechanical properties (inspection standards)

Tensile strength Rm	Yield strength Rp0.2	Elongation A5	Hardness HB	Density	Melting point range
≥690 MPa	≥275 MPa	≥40%	210~260	8.69~8.9 g/cm³	1325-1370℃

Advantages：

Top-tier corrosion resistance: Superior to C-276 across the board, resistant to oxidizing/reducing/mixed acids, wet chlorine, hypochlorite, and chlorine-containing solutions.

Strong resistance to localized corrosion: Far superior to stainless steel and most nickel-based alloys in resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC).

Ultra-low carbon design: No tendency for intergranular corrosion after welding; typically requires no post-weld heat treatment.

Wide temperature adaptability: Stable at ≤1000℃ for long periods, short-term resistance up to 1150℃, excellent low-temperature toughness.

Good machinability and weldability: Excellent cold and hot working and welding performance; high ease of forming and manufacturing.

Disadvantages：

High price: High Ni/Cr/Mo/W content, resulting in high raw material costs.

Difficult to process: Severe work hardening, high viscosity; requires specialized tools and processes for cutting.

Moderate high-temperature strength: Creep strength is lower than precipitation-strengthened high-temperature alloys such as Inconel 718.

Sensitive to stress: Corrosion may still occur at localized stress concentration points; optimized structural design is required.

Hot Selling Products/Standards:

Plate/Strip: ASTM B575, ASME SB-575, AMS 5536

Bars/Forgings: ASTM B574, B564

Seamless Pipe: ASTM B622, B619

Welded Pipe: ASTM B626

Fittings/Flanges: ASTM B366, ASME B16.9/B16.5

Documentation and Certification

Material Certificate: Mill Test Certificate (MTC), conforming to GB/ASTM/EN standards

Test Report: Chemical composition, mechanical properties, non-destructive testing (UT/MT/PT)

Packaging and Transportation

Rust Prevention: Passivation / Pickling / Rust-preventive oil + moisture-proof paper

Crater: Solid wood pallet / iron box, moisture-proof, impact-resistant

Transportation: Suitable for sea/air freight, marked with moisture-proof, shock-proof, high-end alloy

Payment Methods

Flexible payment terms available: T/T and L/C. For new clients, 30% advance payment for production, balance against copy of B/L. L/C is acceptable for large & regular orders to secure both parties.

Previous:Hastelloy C-276 (UNS N10276) Ni-Mo-Cr Super Austenitic Corrosion-Resistant Alloy

Next:Incoloy 800/800H Fe-Ni-Cr Heat-resistant and corrosion-resistant alloy

Warehousing Management

Before each batch of steel leaves the factory, a complete process inspection is strictly carried out. From chemical composition, mechanical properties to dimensional tolerance and surface quality, each item is carefully checked to ensure compliance with national standards and export regulations. At the same time, the quantity, packaging and rust prevention treatment are also verified. An original factory warranty certificate is attached, guaranteeing the quality. Before shipment, inspection photos are provided. Any non-compliant items will not be released, and the quality is fully controllable throughout the process. This ensures your overseas purchasing is safe and worry-free.

All items are visually inspected before delivery. No cracks, deformation, rust, scratches or cutting marks are allowed; edges must be smooth. Only visually sound products will be shipped.

Thickness, width, length, wall thickness, outer diameter have been measured. Straightness, curvature, torsion, diagonal tolerance all meet the corresponding tolerance requirements.

Quality inspection includes: mechanical property tests (yield strength, tensile strength), elongation rate, impact energy, hardness testing, chemical composition testing, process performance testing, etc.

Inspection according to packaging requirements: secure binding, moisture-proof film, rust-proof paper, export fumigation/fumigation-free wooden crates, shipping marks, gross weight, net weight, etc.

We will provide full reception services to support the customers' on-site inspection of the goods.

Hot Rolling Production Line

Cold rolling precision processing

Cold drawing/cold rolling line

Hot Rolling Production Line

Hot rolling production line (producing hot-rolled coils/medium-thick plates, thickness 2–60mm)

Cold rolling precision processing

(Producing ultra-thin / high-precision / shiny panels, with thickness ranging from 0.1 to 3mm, for high-end products)
Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Warehousing Management

A ten-thousand-ton standardized warehouse with grid-based zoning and system positioning enables rapid material retrieval and reduces the time spent searching for materials.

Inbound inspection: Verify the physical items against the inbound form, inspect the appearance, dimensions, and labels. Once confirmed to be correct, the materials are entered into the ERP system and processed for storage.

Logistics and Global Delivery: Self-operated fleet + contracted logistics partners; expedited service available for urgent orders.

International Shipping: Supports FOB, CIF, DDP, and other trade terms, covering 100+ countries and regions.

Process: Booking → Trucking → Customs Declaration → Loading onto Ship/Aircraft → Bill of Lading Issuance → Document Delivery → Destination Port Customs Clearance (Optional) → Last-Mile Delivery.

Provides door-to-door one-stop logistics with full tracking to ensure safe and timely arrival of goods.

After-Sales Service and Traceability: Delivery receipts, logistics information, and quality inspection documents are sent to customers within 24 hours of shipment.

Established a full product lifecycle traceability system, allowing tracking of production, quality inspection, warehousing, and transportation records.

Follow-up inspection within 72 hours of arrival; rapid response and handling of quality issues; assistance in resolving customs clearance issues for foreign trade orders.

Packaging Method