Hastelloy C22 Plate
A Hastelloy C22 Plate is a flat,heavy-duty industrial metal panel made from a high-performance nickel-chromium-molybdenum superalloy.It is renowned for its exceptional resistance to aggressive chemical environments,outperforming standard stainless steel and even Alloy C276 in oxidizing conditions.Engineered to withstand severe heat and corrosion,these plates serve as a reliable raw material for heavy fabrication.
Performance Characteristics
- Dual-Environment Defense:
Uniquely resists both aggressive oxidizing and reducing chemical streams,protecting equipment during unpredictable process “upsets”. - Weld Protection:
It resists the formation of grain-boundary precipitates in the weld heat-affected zone,allowing plates to be deployed safely in their as-welded condition. - Extreme Formability:
Despite being strong and prone to work-hardening,the plate remains highly ductile and can be successfully press-formed,deep-drawn,or punched. - Temperature Caps:
It maintains structural integrity up to a service limit of 1250°F (677°C),above which detrimental metallurgical phases can form.
Applications of Hastelloy C22 Plate
- Chemical Reactors
- Distillation Columns
- Agitators and Blenders
- Flue Gas Desulfurization
- Waste Incinerator Scrubbers
- Wastewater Treatment Liners
- Subsea Equipment Enclosures
- Marine Chemical Tankers
- Sour Gas Well Equipment
- Petroleum Heat Exchangers
- API Synthesis Vessels
- Clean-in-Place Systems
- Nuclear Fuel Reprocessing
- Pulp and Paper Bleach Plants
We offer Hastelloy C22 plates and sheets in 2.0, 3.0 and 4.0 thicknesses.We offer not only stainless steel plates and sheets but also plates made of Hastelloy,Incoloy,Inconel,Monel,and other alloys.Our products comply with ASTM A240,EN 10204,ISO 9001,PED 2014/68/EU,CE,and other standards.With over a decade of experience in manufacturing and import/export,we are your best wholesaler in China.
Chemical Composition of Hastelloy C22 Plate
The chemical composition of a Hastelloy C22 Plate is a precise,solid-solution strengthened combination of nickel,chromium,molybdenum,and tungsten.It features a strictly controlled ultra-low carbon threshold to prevent degradation during welding.
| Ni | Cr | Mo | Fe | W | Co | Mn | V | Si | P | S | C |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Balance | 20.0 – 22.5 | 12.5 – 14.5 | 2.0 – 6.0 | 2.5 – 3.5 | ≤ 2.50 | ≤ 0.50 | ≤ 0.35 | ≤ 0.08 | ≤ 0.02 | ≤ 0.02 | ≤ 0.015 |
Role of Key Elements in Plate Performance
This is the key differentiator from its predecessor,Alloy C276.The high chromium content allows the plate to develop a highly stable passive surface oxide layer,granting superior defense against strongly oxidizing acids like nitric acid,wet chlorine,and ferric chlorides.
These elements provide structural stability and exceptional defense against reducing environments.More importantly,they work together to halt localized chemical attacks,protecting the plate from pitting and crevice corrosion in severe chloride environments.
Keeping carbon to a strict minimum prevents the formation of carbide precipitates at the grain boundaries when the plate is heated.Because of this,fabricated plates can be put straight into service in their as-welded condition without requiring an expensive post-weld solution annealing heat treatment.
Hastelloy C22 Standards & Equivalent Designations
| Hastelloy C22 Alloy | |
|---|---|
| Standard / System | Equivalent Designation |
| UNS Number | UNS N06022 |
| DIN / German Werkstoff | W.Nr. 2.4602 |
| EN Chemical Name | NiCr21Mo14W |
| International Organization | ISO NW6022 |
| Chinese GB | NS3306 |
| JIS | JIS NW 6022 |
| AFNOR | NU-30M |
| Trade Names | Hastelloy C22, Alloy C22, Nickel Alloy C22 |
- Plate, Sheet, and Strip:ASTM B575 / ASME SB575
- Forgings & Flanges:ASTM B564 / ASME SB564
- Rod, Bar, and Wire:ASTM B574 / ASME SB574
- Seamless Pipe and Tube:ASTM B622 / ASME SB622
- Welded Pipe and Tube:ASTM B619 & B626 / ASME SB619 & SB626
- Welding Consumables:AWS A5.14 / AWS A5.11
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Mechanical Properties of Hastelloy C22 Plate
Hastelloy C22 Plates possess remarkable mechanical properties,balancing high structural strength with exceptional ductility and toughness. Because it is a nickel-base superalloy,it maintains these robust mechanical features across a vast temperature spectrum,ranging from sub-zero cryogenic environments up to an elevated service limit of 1250°F (677°C).
Room Temperature Mechanical Properties
| Mechanical Property | Tensile Strength | Yield Strength, 0.2% | Elongation | Hardness |
|---|---|---|---|---|
| Hastelloy C22 | ≥ 690 MPa (100 ksi) | ≥ 310 MPa (45 ksi) | ≥ 45% | ≤ 240 HBW (100 HRB) |
| Typical | ~760 – 800 MPa (~110 – 116 ksi) | ~350 – 407 MPa (~50 – 59 ksi) | ~55% – 62% |
High-Temp Mechanical Performance
As industrial processes heat up,Hastelloy C22 plates resist softening far better than standard stainless steels.It retains a massive portion of its structural load-bearing capacity even at high temperatures:
- At 600°F (316°C):
The typical yield strength sits around 290 MPa (42 ksi),while retaining an excellent elongation profile of roughly 62%. - At 1000°F (538°C):
The typical yield strength stays robust at 276 MPa (40 ksi). - Modulus Drop:
The stiffness safely degrades from 206 GPa at room temperature down to 174 GPa at 1112°F (600°C),preventing sudden brittle failures.
Critical Engineering Fabrication Behaviors
- Work Hardening Tendency:
Due to its nickel alloy DNA,the plate work-hardens rapidly during cold-working operations like press-forming or bending. Fabricators must account for higher power requirements and potential spring-back compared to carbon steel. - Exceptional Impact Strength:
It exhibits stellar fracture toughness.It does not experience a sharp ductile-to-brittle transition when exposed to freezing or deep cryogenic fluids,remaining highly shatter-resistant. - As-Welded Ductility:
Because the chemical matrix inhibits grain-boundary precipitation during welding, the heat-affected zone of a fabricated plate joint retains nearly the same elongation and tensile capability as the parent plate material.
Advantages of Hastelloy C22 Plate
Superior Dual-Environment Protection
Unlike standard alloys that excel in either oxidizing or reducing conditions,C22 plates handle both.They withstand severe oxidizing agents while remaining completely stable in heavy reducing acids.
Elimination of Post-Weld Heat Treatment
Thanks to a strictly controlled,ultra-low carbon chemistry,plates resist the formation of grain-boundary precipitates during welding.This saves on unnecessary expenses and time.
Maximum Localized Corrosion Resistance
By optimizing the precise synergy between Chromium, Molybdenum, and Tungsten,your plates offer an exceptionally high PREN.This chemistry provides unmatched resistance to localized pitting, crevice corrosion, and chloride-induced SCC.
Certified Strict Metallurgical Integrity
Our manufacturing chain utilizes advanced processing and precise solution annealing.This ensures your plates are completely free of detrimental intermetallic phases or micro-segregation.
FAQs About Hastelloy C22 Plate
No.Hastelloy C22 is a fully austenitic nickel-base alloy.It remains completely non-magnetic in both its annealed and heavily cold-worked states.
It is classified as moderate-to-difficult to machine.It work-hardens rapidly and has high shear strength.Machining requires heavy-duty rigid equipment,sharp tooling,slow speeds,and high feed rates.
The PREN for Hastelloy C22 is exceptionally high,typically sitting around 45 to 49.This confirms its extreme resistance to localized chloride pitting.
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