01
Hastelloy C-22 Round Bar
We supply solid rounds from 6 to 340 mm for pump shafts, valve stems, and machined acid-plant components.
Request Availability →Hastelloy C‑22 Bar and Rod
High-chromium nickel alloy bar and rod for oxidizing and mixed-acid duty where standard C-family grades fall short.
High-Chromium Coverage
C-22 carries the highest chromium in the C-family, so your bar resists oxidizing acids and wet chlorine that defeat lower-chromium alloys.
Heat-Recorded Chemistry
We report chromium, molybdenum, and tungsten results per heat on the EN 10204 3.1 certificate, so you can verify the grade before fabrication.
Flexible Bar Supply
Round, hex, square, and forged sections are cut to order, with custom diameters and surface finishes reviewed against our mill route.
PRODUCT OVERVIEW
About Hastelloy C-22 Bar and Rod
Hastelloy C-22 bar and rod is supplied in UNS N06022 / W.Nr. 2.4602, a nickel-chromium-molybdenum-tungsten alloy containing approximately 20.0–22.5% chromium. Its balanced chromium, molybdenum, and tungsten content provides broad resistance to oxidizing acids, wet chlorine, and mixed oxidizing-chloride environments.
For oxidizing or variable process streams, we supply C-22 bar and rod in the solution-annealed condition to ASTM B574, available in round, hex, square, and forged forms and cut to your required lengths. EN 10204 3.1 certification can be supplied with heat number identification, with PMI verification available when required by your specification.
For strongly reducing acid service, Hastelloy C-276 Bar and Rod may be a more suitable alternative due to its lower chromium and higher molybdenum content.
PRODUCT FEATURES
Key Features of Hastelloy C-22 Bar and Rod
Southerly Alloy supplies Hastelloy C-22 (UNS N06022) bar and rod to ASTM B574 in solution-annealed, hot-finished, and cold-drawn conditions, with custom sizes, surface finishes, and EN 10204 3.1 mill test certificates. Its 20–22.5% chromium resists oxidizing acids, wet chlorine, and mixed oxidant-chloride media that defeat lower-chromium grades. Most of this bar serves FGD, chemical, pharmaceutical, and waste-treatment equipment facing variable or aggressive process streams.
Hastelloy C-22
Broad Oxidizing-Acid Resistance
Higher chromium lets C-22 resist nitric acid, ferric chloride, and cupric chloride where Hastelloy C-276 Bar and Rod shows weaker performance.
01
Mixed Oxidant-Chloride Resistance
Wet chlorine, hypochlorite, and chlorine dioxide are handled by the chromium-rich passive film that resists localized attack.
02
Reducing-Acid Coverage
Molybdenum and tungsten still cover hydrochloric, sulfuric, and phosphoric acid systems in the same bar.
03
Chloride Localized-Corrosion Resistance
Pitting and crevice attack in seawater and process chloride streams are resisted by the high pitting-resistance number.
04
Weld-Zone Immunity
Ultra-low carbon and silicon keep welded joints corrosion-resistant without post-weld heat treatment in the field.
05
Higher Minimum Strength
Annealed C-22 meets a 310 MPa yield minimum, above the C-276 floor, with 45% elongation for fabrication tolerance.
06
Solution-Annealed Stability
Water-quenched annealing after hot work restores full corrosion resistance before the bar is released.
07
Heat-Traceable Documentation
Lot-by-lot certificates record the heat number and the chromium, molybdenum, and tungsten results for your bar.
08
WHY CHOOSE US
Why Choose Hastelloy C-22
Southerly Alloy controls the C-22 melt from charge to certificate. The chromium-rich chemistry your oxidizing service needs is confirmed before the bar is cut. Our metallurgists review each enquiry and release the lot with full heat records.
01
Heat Chemistry Verified
Spectrometer checks on every heat confirm the 20% chromium floor before we release the bar.
02
Documented Sour-Service Option
Where the order calls for it, we assemble per-heat hardness and chemistry records for NACE MR0175 / ISO 15156 review.
03
Custom Lengths and Finishes
Diameters, cut lengths, and surface conditions are agreed with the drawing and the order quantity.
04
Single-Point Order Management
One coordinator handles your enquiry, production, inspection, and export documents from start to shipment.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
Each C-22 bar starts as a vacuum-refined heat where chromium and tungsten are held high to build the oxidant resistance. We solution-anneal and water-quench every lot, then finish to the ordered condition and file the test data against the heat number.
01
Charge Compounding
Nickel, chromium, molybdenum, tungsten, and iron are weighed into the UNS N06022 window before melting begins.
02
Vacuum Melting
The charge is refined under vacuum to keep carbon, silicon, and gas within the tight limits.
03
Forging and Rolling
We reduce ingots to bar section by forging and rolling, refining the cast grain at every pass.
04
Solution Annealing
Above 1100 °C the bar is held then water-quenched, dissolving precipitates that would harm corrosion resistance.
05
Cold Finishing
Ordered diameters and surfaces are reached by drawing, peeling, or centreless grinding the annealed bar.
06
Straightening and Cutting
Length cutting and straightening follow, and we set the turning allowance with the order.
07
Surface Conditioning
Pickling or grinding clears the scale, keeping the surface ready for acid and chloride service.
08
Final Verification
Before release we confirm chemistry, tensile, hardness, and size against the condition written on the order.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
Southerly Alloy produces C-22 bar in stock and order-specific diameters, fixing the solution-annealed condition before each cut. The figures below show the melting, annealing, and test capacity that back that promise, and sour-service work shares the same qualified route.
20,000+ m²
Factory Area
One site holds our melting, annealing, and finishing lines for C-22 bar.
50+
Production Machines
Hot working, solution annealing, drawing, and grinding are covered by this equipment.
600 Tons
Monthly Capacity
Across stock and order-specific diameters, this is our monthly nickel-alloy bar output.
30+
Technical Engineers
These metallurgists review your oxidizing and chloride service specifications with you.
NACE MR0175
Sour-Service Scope
Engineers can specify this bar for H2S duty because it meets NACE MR0175 / ISO 15156, and we keep per-heat hardness and chemistry records for the release documents.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
No C-22 bar leaves the works until we prove the ordered ASTM B574 requirements on the heat. First we check chromium, molybdenum, and tungsten by spectrometer against the N06022 window. Intergranular and hardness results are added where your order specification requires them.
01
Material Verification
Spectrometer analysis confirms chromium, molybdenum, and tungsten against the ASTM B574 limits for UNS N06022.
02
Mechanical Testing
Tensile, yield, and hardness are recorded for the condition actually shipped, not a generic value.
03
Surface and Dimensional Checks
Diameter, straightness, and surface condition are verified to the ordered B574 tolerance, and PMI is added where the specification calls for it.
04
Heat-Linked Documentation
Each certificate names its heat number, so your incoming inspection can trace any bar back to its test results.
PRODUCT FORMS
Available Product Forms
Round bar and rod carry most C-22 enquiries, while hex, square, flat, and forged sections cover oxidizing and mixed-acid plant work. We price every form for its own condition, tolerance, and finish, and we set the machining allowance with the order.
02
Hastelloy C-22 Round Rod
Drawn smaller stock is held to tight straightness for fasteners and instrument fittings.
Request Availability →
03
Hastelloy C-22 Bright Bar
A bright cold-drawn finish gives tight diameter control for automatic lathes and CNC turning.
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04
Hastelloy C-22 Cold-Drawn Bar
The as-drawn condition raises yield, and we stress-relieve it where straightness is critical.
Request Availability →
05
Hastelloy C-22 Hex Bar
Across-flats hex sections are cut for bolting and multi-flat valve components.
Request Availability →
06
Hastelloy C-22 Square Bar
Square sections are cut to your width and length for supports and fabricated frames.
Request Availability →
07
Hastelloy C-22 Flat Bar
Rolled rectangular sections meet specified thickness and width for scrubber and duct hardware.
Request Availability →
08
Hastelloy C-22 Forged Bar
Larger diameters and shaped sections are forged for heavy valve bodies needing a controlled wrought structure.
Request Availability →
APPLICATIONS
Engineered For Demanding Industries
Engineers specify C-22 bar where one alloy must survive oxidizing acids and chloride attack in the same stream. Most of this bar goes to FGD, chemical, pharmaceutical, and waste-treatment plants. Tell us the medium, concentration, and temperature when you request a quote.
Discuss Your Application →
01
Nitric and Mixed-Acid Plants
Reactor internals and agitator shafts are cut for nitric, sulfuric, and mixed-acid process lines.
02
Wet Chlorine and Hypochlorite
Hardware for wet chlorine, chlorine dioxide, and hypochlorite bleach service is supplied from stock and order.
03
Flue Gas Desulfurization Systems
FGD absorber shafts, dampers, and duct supports are built for sulfurous and chloride condensate duty.
04
Pharmaceutical and Fluorochemical Reactors
Shafts and baffle supports are provided where product purity depends on low metallic pickup.
05
Waste Incineration and Treatment
Aggressive combustion gases and acidic wastewater streams are met with corrosion-resistant bar hardware.
06
Chloride-Bearing Process Streams
For pitting-prone exchangers, we cut tubesheet, baffle, and support parts for seawater-cooled service.
07
Pulp and Paper Bleaching
Bleach-plant digester fittings, ClO₂ hardware, and blow-line parts are supplied for chlorine service.
08
Sour Oil and Gas Production
Valve, tree, and wellhead bars are supplied for H2S duty inside the NACE hardness envelope.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
The limits below follow ASTM B574 for UNS N06022 bar and rod, with nickel as the balance of the melt. Chromium sits at 20.0–22.5% — about six points above C-276 — to drive oxidizing-media resistance, while molybdenum and tungsten cover reducing acids and localized attack, and ultra-low carbon protects the weld zones. Therefore, the mill test certificate governs final acceptance.
| Element | Content |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 20.0–22.5% |
| Molybdenum (Mo) | 12.5–14.5% |
| Tungsten (W) | 2.5–3.5% |
| Iron (Fe) | 2.0–6.0% |
| Cobalt (Co) | 2.5% max. |
| Manganese (Mn) | 0.50% max. |
| Vanadium (V) | 0.35% max. |
| Silicon (Si) | 0.08% max. |
| Carbon (C) | 0.015% max. |
| Phosphorus (P) | 0.020% max. |
| Sulfur (S) | 0.020% max. |
Mechanical Properties
Values below separate the ASTM B574 minimums from results typically measured on solution-annealed bar. The standard sets one condition for rod and bar; therefore, we agree cold-drawn or high-strength requirements at quotation. Confirm the ordered condition with your enquiry.
| Condition | Tensile Strength | Yield Strength (0.2%) | Elongation | Hardness |
|---|---|---|---|---|
| Annealed — ASTM B574 minimum | ≥100 ksi (690 MPa) | ≥45 ksi (310 MPa) | ≥45% | ≤241 HB |
| Annealed bar — typical values | 116 ksi (800 MPa) | 53.7 ksi (370 MPa) | 62% | Approx. 100 HRB |
C-22 is not age-hardenable, so any strength above the annealed minimum comes from cold work. Cold-drawn bar is quoted to its as-drawn condition when higher yield is needed.
Physical Properties
Typical room-temperature values below support design work rather than acceptance testing. Because C-22 stays practically non-magnetic across its working range, it suits instrument and magnetically sensitive assemblies.
| Property | Value |
|---|---|
| Density | Approx. 8.69 g/cm³ |
| Melting range | Approx. 1357–1399 °C |
| Modulus of elasticity | Approx. 206 GPa |
| Thermal conductivity at 20 °C | Approx. 10.1 W/m·K |
| Specific heat at 20 °C | Approx. 414 J/kg·K |
| Electrical resistivity at 20 °C | Approx. 1.14 µΩ·m |
| Thermal expansion, 20–100 °C | Approx. 12.4 µm/m·K |
| Magnetic behaviour | Practically non-magnetic at ambient temperature |
Standards
C-22 bar is supplied to ASTM B574; the full specification is published by ASTM International. For sour-service projects, the alloy is listed in NACE / AMPP MR0175 and ISO 15156 as a corrosion-resistant alloy with a 35 HRC hardness ceiling. The designations below are cross-reference identifiers rather than separate approvals.
| Standard / Designation | Scope |
|---|---|
| ASTM B574 | Nickel-chromium-molybdenum-tungsten alloy rod and bar — UNS N06022 |
| ASME SB574 | ASME edition for rod and bar |
| ASTM B564 / ASME SB564 | Nickel alloy forgings — UNS N06022 |
| ASTM B575 / ASME SB575 | Plate, sheet, and strip in the same grade |
| ASTM B622 / ASME SB622 | Seamless pipe and tube in the same grade |
| ASTM B366 / ASME SB366 | Factory-made wrought fittings — UNS N06022 |
| AMS 5759 | Aerospace specification for C-22 bar and forgings |
| ISO 6208 | Nickel-alloy bar and rod — international standard |
| NACE MR0175 / ISO 15156 | Sour service in oil and gas production |
| UNS N06022 | Material designation for Hastelloy C-22 |
| W.Nr. 2.4602 / NiCr21Mo14W | European designation for Alloy C-22 |
| DIN 17744 / VdTÜV 479 | German material data and pressure-vessel sheet |
Dimensions
Ranges below reflect normally produced sections; exact availability depends on condition, finish, and quantity, confirmed at quotation. However, we assess non-standard diameters and lengths against the mill route before we return a quotation.
| Product Form | Typical Supply | Length |
|---|---|---|
| Round Bar | 6–340 mm dia. | Cut to length or random |
| Round Rod | 3–50 mm dia. | Cut to length |
| Bright Bar | 6–150 mm dia. | Cut to length or random |
| Square Bar | 10–150 mm | Cut to length or random |
| Hex Bar | 10–150 mm A/F | Cut to length or random |
| Flat Bar | 3–100 mm thick × 10–300 mm wide | Cut to length |
| Forged Bar | 100–340 mm dia. or forged section | Cut to length |
| Precision-Ground Rod | 3–100 mm dia., tight tolerance | Cut to length |
Surface Finishes
We choose each finish for the next operation, whether machining allowance, acid-service exposure, or a painted assembly. Availability depends on diameter, condition, and order quantity. Therefore, we agree each finish with the order rather than assume it from stock.
| Surface Condition | Typical Use |
|---|---|
| Solution annealed and pickled | Standard delivery for acid and seawater service |
| Hot-worked (as-rolled or forged) | Parts that will be machined to size |
| Cold drawn | Close diameter control with a brighter surface |
| Peeled | Uniform diameter with a machined skin for further turning |
| Centreless ground | Tight diameter and straightness for shafting |
| Polished | Reduced roughness for product-contact and visible parts |
| Rough turned | Machining allowance held on large or forged bar |
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
HOW TO START
Start Your Order in 6 Simple Steps
A single coordinator moves your C-22 order from enquiry to shipment. We lock the solution-anneal route before cutting the bar, so our metallurgists review oxidizing or sour duty at the start.
1
Describe the Service
Tell us the corrosive medium, its concentration, temperature, and the diameter, length, and quantity you need.
2
Agree the Condition
We then confirm the annealed, hot-finished, or cold-drawn state with your machining plan.
3
Review the Quotation
One reply returns the price, lead time, and the document list for your order.
4
Approve the Specification
You confirm dimensions, inspection level, and delivery terms in writing before cutting begins.
5
Make and Verify
We melt, solution-anneal, and test the bar to the condition written on the order.
6
Dispatch the Lot
The bar leaves with its certificates and export paperwork, and we close out the delivery terms.
What Our Clients Say
Feedback from buyers and engineers who source nickel alloy materials from Southerly Alloy.
★★★★★
“The C-22 rod for our mixed-acid reactor arrived with chromium and molybdenum on the certificate, which matched our welding procedure.”
★★★★★
“We ordered solution-annealed C-22 bar for an FGD retrofit; the per-heat hardness record passed incoming inspection on the first try.”
★★★★★
“One trial bar confirmed the ground finish and straightness before we placed the full scrubber-shaft order.”
CERTIFICATIONS & QUALITY DOCUMENTATION
Certifications & Quality Documentation
Our production and inspection processes are certified to international standards, and every delivery ships with EN 10204 3.1 mill test certificates.
ISO 9001:2015
Quality Management System
PED 2014/68/EU
Pressure Equipment Directive
ASTM / ASME
Material Standards Compliance
EN 10204 3.1
Mill Test Certificates
FAQ
Frequently Asked Questions
Which ASTM specification covers Hastelloy C-22 bar and rod?
ASTM B574 / ASME SB574.
Is Hastelloy C-22 bar resistant to nitric acid?
Yes. Its 20% chromium resists nitric and mixed-acid streams within the applicable temperature limits.
Is Hastelloy C-22 bar approved for sour service?
Yes. We supply it to NACE MR0175 / ISO 15156 with per-heat hardness records within the limits.
Which sizes of Hastelloy C-22 bar can you supply?
Round bar 6–340 mm, rod from 3 mm, and hex, square, or flat sections to 150 mm.
Can you supply custom Hastelloy C-22 bar and rod?
Yes. Peeling, grinding, and cut-to-length cover diameters outside our stock range.
What is your MOQ for Hastelloy C-22 bar?
One bar for most stock diameters.
What are your trade terms for Hastelloy C-22 bar?
We mainly quote on FOB terms; EXW and CIF are also available.
How is the price of Hastelloy C-22 bar calculated?
Mainly on weight; we fix the nickel, chromium, and molybdenum share in the quotation.
What is the lead time for Hastelloy C-22 bar?
7-15 days for stock sizes; about 25 days for made-to-order annealed bar.
Do you provide EN 10204 3.1 or 3.2 certificates?
Yes. 3.1 comes with every heat; we arrange 3.2 and third-party witness on request.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Send the medium, concentration, and dimensions, and we quote stock or custom C-22 bar with price, lead time, and documents. We lock the anneal and inspection level before production, so the approved bar is the bar that ships.
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