What types of corrosion is C276 alloy most resistant to?

It performs particularly well in the following environments: Wet chlorine, hypochlorite, and chlorine dioxide solutions; Sulfuric, hydrochloric, and hydrofluoric acids (especially at low to medium concentrations, in the presence of impurities, and at high temperatures); Phosphoric acid (at various concentrations and temperatures, including wet process acids with high impurities); Organic acids such as acetic and formic acids; Environments containing chlorides (such as seawater and brines) offer excellent resistance to pitting and crevice corrosion.

what is the difference between hastelloy c22 and c276?

Hastelloy C22 is an upgraded version of C276. Chemical Composition (Key Difference): C22 has a higher chromium (Cr) content (20-22.5%) and a slightly higher molybdenum (Mo) content (12.5-14.5%). C276 has a lower Cr content (14.5-16.5%) and a Mo content of 15-17%. Corrosion Resistance: C22 significantly outperforms C276 in pitting and crevice corrosion resistance in oxidizing media (such as hot Fe⁺, Cu⁺⁺ brines, and hypochlorites) and in the welded state. C22 also has a wider operating temperature range. Weldability : C22 offers improved weldability, exhibits less corrosion degradation in the heat-affected zone after welding, and is less prone to the precipitation of harmful phases.

Hastelloy C276 Suppliers

Gnee provides high quality Hastelloy C276 products including plates, coils, tubes, bars, etc. All products meet ASTM B575, B622, B574 standards and have a complete quality assurance system and complete certification. Factory price, free samples available.

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UNS N10276

High Temperature Alloys

DIN 2.4819

Hastelloy C276 Products

High Quality Material

Plates | Bars | Tubes | Fittings

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500 Tons in Stock

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Hastelloy C-276 Material Manufacturer

Gnee’s Hastelloy C-276 offers excellent mechanical properties, corrosion resistance, and reliable production and processing. We ensure precision manufacturing, strict quality control, and provide cutting, welding, and third-party testing services.

We maintain an extensive inventory of Hastelloy products, including C276 bar, plate, tube, and various grades. Conforming to ASTM and ASME standards, we offer a wide range of sizes and specifications to meet your specific needs, from small R&D projects to large project orders. Request a quote!

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Rich Grades & Shapes	Hastelloy Plate & Pipe & Tube & Sheet & Bar & Coil & Fitting In Stock Hastelloy C-276 & Hastelloy B & Hastelloy B-2 & Hastelloy B-3 & Hastelloy C-22 & Hastelloy C-4, etc.
Supply Ability	Up to 800 tons per month

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we have various Shapes of Hastelloy C276 in large stock

Gnee is a leading manufacturer and global supplier of high-performance materials, specializing in a wide range of Nickel Alloy products, including Hastelloy C276 Bar. With over a decade of industry experience, we have established a strong presence in key international markets, including Europe, North America, the Middle East, and Southeast Asia.

Hastelloy C276 Plate
Hastelloy C276 Pipe
Hastelloy C276 Bar
Hastelloy C276 Tube
Hastelloy C276 Wire
Hastelloy C276 Flange
Hastelloy C276 Coil
Hastelloy C276 Fittings

Description

Hastelloy C-276 is a nickel-molybdenum-chromium alloy renowned for its exceptional resistance to a wide range of severe corrosive environments. This alloy is particularly effective in resisting pitting, stress corrosion cracking, and crevice corrosion in both oxidizing and reducing conditions, making it a versatile choice for industries such as chemical processing, power generation, and marine engineering.

With a molybdenum content of approximately 16% and chromium at around 15.5%, Hastelloy C-276 outperforms many stainless steels and other nickel alloys, particularly in handling aggressive chemicals like hydrochloric acid, sulfuric acid, and chlorine gas. Its ability to withstand temperatures up to 1038°C (1900°F) further extends its application in high-temperature environments, including heat exchangers, reactors, and flue gas scrubbers.

Compared to similar alloys like Hastelloy C-22, C-276 demonstrates enhanced weldability, reducing the risk of localized corrosion at weld joints, which is a critical factor in complex fabrication processes.

Hastelloy C-276 Product Parameters

Parameter	Specification
Material Name	Hastelloy C-276
Standard	ASTM B575, ASTM B622, ASTM B619, ASTM B366
Forms	Plate, Sheet, Pipe, Tube, Bar, Wire, Fittings, Flange
Density	8.89 g/cm³
Melting Point	1325–1370 °C
Tensile Strength	≥690 MPa
Yield Strength	≥283 MPa
Elongation	≥40%
Manufacturing Process	Cold Rolled, Hot Rolled, Forged, Seamless, Welded
Corrosion Resistance	Excellent in oxidizing and reducing environments
Applications	Chemical processing, marine, pollution control

What ASTM standards of Inconel Tube can Gnee produce?

Standard	Description
ASTM B575	Specification for nickel-molybdenum-chromium alloys in plate, sheet, and strip forms.
ASTM B622	Specification for seamless nickel-molybdenum-chromium alloy pipe and tube.
ASTM B619	Specification for welded nickel-molybdenum-chromium alloy pipe.
ASTM B626	Specification for welded nickel-molybdenum-chromium alloy tube.
ASME SB575	ASME standard corresponding to ASTM B575, applied in pressure vessel construction.
ASME SB622	ASME standard corresponding to ASTM B622 for pressure systems.
UNS N10276	Unified Numbering System (UNS) designation for Hastelloy C-276.
EN 2.4819	European standard for nickel-molybdenum-chromium alloy.
DIN 17750, 17751	German standards for nickel alloy materials in sheets, plates, tubes.

Alloy UNS N10276 Equivalent grades

UNS N10276
DIN 2.4819
EN NiMo16Cr15W
JIS NW0276
BS NA 34

Hastelloy C-276 Resistance to Pitting and Crevice Corrosion

HASTELLOY C-276 alloy offers excellent resistance to pitting and crevice corrosion, which are common problems for austenitic stainless steels. To evaluate this resistance, Critical Pitting Temperatures (CPT) and Critical Crevice Temperatures (CCT) are typically measured in acidified 6 wt.% ferric chloride, following ASTM Standard G 48. These temperatures indicate the lowest points at which pitting and crevice corrosion begin to occur within 72 hours of exposure. For comparison, the CPT and CCT values of 316L, 254SMO, 625, and Hastelloy C-276 alloys are provided below.

Alloy	Critical Pitting Temperature in Acidified 6% FeCl3		Critical Crevice Temperature in Acidified 6% FeCl3
Alloy	°F	°C	°F	°C
316L	59	15	32	0
254SMO	140	60	86	30
625	212	100	104	40
Hastelloy C-276	302	150	131	55

Other chloride-bearing environments, notably Green Death (11.5% H2SO4 + 1.2% HCl + 1% FeCl3 + 1% CuCl2) and Yellow Death (4% NaCl + 0.1% Fe2(SO4)3 + 0.021M HCl), have been used to compare the resistance of various alloys to pitting and crevice attack (using tests of 24 hours duration). In Green Death, the lowest temperature at which pitting has been observed in alloy C-276 alloy is the boiling point. In Yellow Death, Hastelloy C-276 alloy has not exhibited pitting, even at the maximum test temperature (150°C). The Critical Crevice Temperature of alloy C-276 alloy in Yellow Death is 60°C.

Hastelloy C-276 Resistance to Stress Corrosion Cracking

One of the key features of nickel alloys is their strong resistance to chloride-induced stress corrosion cracking. To evaluate material resistance to this severe form of corrosion, the ASTM Standard G 36 method, using boiling 45% magnesium chloride and stressed U-bend samples, is commonly employed. The results show that nickel alloys C-276 and 625 demonstrate significantly higher resistance compared to austenitic stainless steels. Testing was halted after 1,008 hours (six weeks).

Alloy	Time to Cracking
316L	2 h
254SMO	24 h
625	No Cracking in 1,008 h
C-276	No Cracking in 1,008 h

Features and Advantages

Exceptional Corrosion Resistance: Resists oxidizing and reducing agents, ideal for handling harsh chemicals like ferric and cupric chlorides.
High Weldability: Maintains corrosion resistance in welded joints, minimizing risk in complex assemblies.
Wide Temperature Tolerance: Performs reliably in both cryogenic and high-temperature environments up to 1000°C.
Pitting and Crevice Corrosion Resistance: Excellent protection against localized corrosion in aggressive solutions, such as seawater.
Versatility: Suitable for use in chemical processing, marine environments, and pollution control systems due to its robust properties.
Longevity in Harsh Conditions: Reduces maintenance costs with prolonged service life under extreme operational demands.

Parameter Information

Hastelloy C-276 Chemical Composition

Element	Composition (%)
Nickel (Ni)	57.0 min
Molybdenum (Mo)	15.0 – 17.0
Chromium (Cr)	14.5 – 16.5
Iron (Fe)	4.0 – 7.0
Tungsten (W)	3.0 – 4.5
Cobalt (Co)	2.5 max
Manganese (Mn)	1.0 max
Vanadium (V)	0.35 max
Silicon (Si)	0.08 max
Carbon (C)	0.01 max
Phosphorus (P)	0.04 max
Sulfur (S)	0.03 max

Hastelloy C-276 Tensile Strength and Elongation

Property	Value
Yield Strength (0.2% Offset)	≥ 35 ksi (240 MPa)
Ultimate Tensile Strength	85-95 ksi (590-655 MPa)
Elongation in 2 inches	≥ 30%
Hardness (Rockwell B)	85-95
Modulus of Elasticity	210 GPa (30,500 ksi)

Hastelloy C-276 Physical Properties

Property	Value
Density	8.89 g/cm³
Melting Point	1330-1380°C (2426-2520°F)
Electrical Resistivity	0.00083 ohm-cm
Thermal Conductivity	12.0 W/m·K (at 25°C)
Specific Heat Capacity	0.44 J/g·K

Hastelloy C-276 Hardness

Form	Hardness, HRBW	Typical ASTM Grain Size
Sheet	88	3.5 – 6
Plate	88	45296
Bar	86	45296

All samples tested in solution-annealed condition.
HRBW = Hardness Rockwell “B”, Tungsten Indentor.

Size Specifications

Specification Of Hastelloy C276 Sheet/Plate

Dimension Type	Specification Range	Remarks
Thickness	0.5 mm ~ 100 mm	Can be customized.
Width	1000 mm ~ 2000 mm
Length	2000 mm ~ 6000 mm
Surface Finish	Mill Finish, 2B Finish, BA (Bright Annealed) Finish, 8K Mirror Finish, Hairline Finish, Satin Finish

Specification Of Hastelloy C276 Coil / Strip

Dimension Type	Specification Range	Remarks (Common Sizes or Requirements)
Thickness	0.03 mm ~ 2.0 mm	–
Width	20 mm ~ 610 mm	–
Coil I.D.	–	Can be customized
Surface Finish	Mill Finish, 2B Finish, BA Finish	Can be customized
Other	–	Coils can be subsequently processed by leveling (cut-to-length) or slitting.

Specification Of Hastelloy C276 Tube/Pipe

Dimension Type	Specification Range
Outer Diameter (O.D.)	6 mm ~ 530 mm
Wall Thickness	0.5 mm ~ 50 mm
Length	1 m ~ 12 m
Tube/Pipe Type	Seamless Tube (ASTM B622), Welded Tube (ASTM B619/B626)
Standards	ASTM B622 (Seamless), ASTM B619 / B626 (Welded)

Specifications Of Hastelloy C276 Bar / Rod

Dimension Type	Specification Range	Remarks (Product Form or Common Sizes)
Diameter	6 mm ~ 500 mm	Can be customized
Length	0.5 m ~ 30 m
Product Form	Hot Rolled/Forged, Centerless Ground or Turned & Polished
Other Forms	Round Billets, Ring Blanks, Hollow Bars, Forged Rings

Specification Of Hastelloy C276 Fittings

Nominal Pipe Size, NPS	Outside Diameter, OD	Wall Thickness, SCH 40S	Wall Thickness, SCH 80S
1/2″	21.34 mm	2.77 mm	3.73 mm
3/4″	26.67 mm	2.87 mm	3.91 mm
1″	33.40 mm	3.38 mm	4.55 mm
2″	60.33 mm	3.91 mm	5.54 mm
4″	114.30 mm	6.02 mm	8.56 mm
6″	168.28 mm	7.11 mm	10.97 mm
8″	219.08 mm	8.18 mm (SCH 40)	12.70 mm (SCH 80)
10″	273.05 mm	9.27 mm (SCH 40)	15.09 mm (SCH 80)

(Due to space limitations, only some sizes are shown.)

what is hastelloy c276 used for？

After decades of verification, Gnee has a mature production process, and Hastelloy C276 has been supplied to the following industries around the world

Hastelloy C276 plate/sheet

Chemical/Petrochemical Industry
Environmental Protection/Desulfurization Industry
Pharmaceutical/Food Industry
Marine Engineering

Hastelloy c276 pipe/tube

Strong acid/alkali transport pipes
Heat exchanger/boiler heat exchanger tubes
Nuclear energy/new energy sectors
Pharmaceutical/food transport
Oil and gas pipelines

hastelloy c276 coil

Core components of heat exchangers/coolers
Tank/container linings
Electronics/semiconductor industries
Aerospace

Hastelloy c276 bar/rod

Chemical equipment connectors
Core components for valves and pumps
High-temperature & harsh-environment structural parts
Specialty tools and molds

Other Hastelloy Alloy products

Gnee Alloys-nickel alloy Rich Grades For Sale

In addition to Hastelloy C276, we can also provide the following grades of nickel-based alloys

Inconel Alloy Grades
Hastelloy Alloy Grades
Monel Alloy Grades
Incoloy Alloy Grades
Pure Nickel Grades

Inconel 690 (UNS N06690, EN 2.4642)
Inconel 725 (UNS N07725, EN 2.4959)
Inconel X-750 (UNS N07750, EN 2.4669)

Inconel 617 (UNS N06617, EN 2.4663)
Inconel 693 (UNS N06693)
Inconel 738 (UNS N07738)

Hastelloy B (UNS N10001, EN 2.4617)
Hastelloy B-2 (UNS N10665, EN 2.4617)
Hastelloy B-3 (UNS N10675, EN 2.4600)

Hastelloy G-30 (UNS N06030, EN 2.4603)
Hastelloy G-35 (UNS N06035)
Hastelloy X (UNS N06002, EN 2.4665)

Monel 400 (UNS N04400, EN 2.4360)
Monel 401 (UNS N04401)
Monel 404 (UNS N04404)

Monel R-405 (UNS N04405)
Monel K-500 (UNS N05500, EN 2.4375)

Incoloy 825 (UNS N08825, EN 2.4858)
Incoloy 925 (UNS N09925)
Incoloy 926 (UNS N08926, EN 1.4529)

Incoloy 330 (UNS N08330, EN 1.4886)
Incoloy 25-6Mo (UNS N08926, EN 1.4529)

FAQ

Below are some frequently asked questions about Hastelloy C276. If you have any other questions, please feel free to contact us.

It performs particularly well in the following environments:

Wet chlorine, hypochlorite, and chlorine dioxide solutions;
Sulfuric, hydrochloric, and hydrofluoric acids (especially at low to medium concentrations, in the presence of impurities, and at high temperatures);
Phosphoric acid (at various concentrations and temperatures, including wet process acids with high impurities);
Organic acids such as acetic and formic acids;
Environments containing chlorides (such as seawater and brines) offer excellent resistance to pitting and crevice corrosion.

C276 has excellent weldability. Recommended welding methods:

Welding methods: Shielded Tungsten Inert Gas Welding (GTAW/TIG), Metal Inert Gas Welding (GMAW/MIG), and Stick Metal Arc Welding (SMAW).

Filler Material: Typically, ERNiCrMo-4 welding wire or ENiCrMo-4 welding rod, matched to the base metal composition, is used.

Key Points: Maintain low heat input and ensure adequate inert gas shielding (with back shielding gas if necessary) to prevent oxidation in the weld area and sensitization of the heat-affected zone.

The typical final heat treatment is solution annealing, which involves heating to around 1121°C followed by a rapid water quench. This dissolves any precipitated phases (such as μ phase) and restores the alloy to its most corrosion-resistant state. Stress relief heat treatment is strictly prohibited, as it may cause the precipitation of detrimental phases at grain boundaries, which in turn reduces corrosion resistance.

Normally nonmagnetic (non-magnetic).

Hastelloy C276 is an austenitic nickel-based alloy. Its crystal structure makes it completely nonmagnetic in the annealed (softened) state.

Exception: After cold working (e.g., bending, cutting), the surface or processed areas may become slightly magnetic, but the magnetism is very weak.

Hastelloy C22 is an upgraded version of C276.

Chemical Composition (Key Difference): C22 has a higher chromium (Cr) content (20-22.5%) and a slightly higher molybdenum (Mo) content (12.5-14.5%). C276 has a lower Cr content (14.5-16.5%) and a Mo content of 15-17%.
Corrosion Resistance: C22 significantly outperforms C276 in pitting and crevice corrosion resistance in oxidizing media (such as hot Fe⁺, Cu⁺⁺ brines, and hypochlorites) and in the welded state. C22 also has a wider operating temperature range.
Weldability: C22 offers improved weldability, exhibits less corrosion degradation in the heat-affected zone after welding, and is less prone to the precipitation of harmful phases.

Custom orders are welcome

Gnee, a trusted China-based nickel alloy manufacturer since 2008, delivers precision-engineered nickel alloy pipe solutions tailored to your industrial requirements. We offer fully customizable specifications including diameters (6mm to 2000mm), wall thickness (0.5mm to 50mm), and lengths (up to 18m), working with premium materials like Inconel®, Hastelloy®, and Monel®.

Our in-house metallurgists utilize advanced hot extrusion and cold drawing techniques to meet ASTM/ASME/DIN standards, complete with EN 10204 3.1 certification and full traceability. Partner with us for seamless customization from prototype to bulk production with 30-60 day lead times.

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Why Choose Gnee?

Rich Inventory

Nickel Alloy Inventory

Gnee maintains a rich inventory of high-performance nickel alloys, including Inconel, Incoloy, Hastelloy, Monel, and Stainless Steel Alloy grades. Our extensive stock ensures that we can meet the immediate needs of our customers, offering a wide range of sizes, forms, and specifications, from plates and bars to tubes and fittings. With quick access to critical materials, we minimize lead times and provide fast, reliable solutions

Inconel Alloy
Monel Alloy
Hastelloy Alloy
Nickel
Nimonic Alloy
Stainless Steel Alloy

Secure Packaging

Our export packaging complies with international standards for shipping and handling, ensuring the safe delivery of nickel alloys to various countries.

Common packaging methods

Pallet packaging: Plates and sheets are usually placed on pallets for added stability
Bundle packaging: Rods and tubes are often bundled together and secured with steel straps or high-strength straps
Crate packaging: Wooden crates offer good protection and stability
Foam protection packaging: Small accessories are often individually wrapped with foam
Reel packaging: Wire is usually rolled into a round reel and wrapped with anti-corrosion material

In addition, if you have special requirements for packaging methods, we provide customized services to meet your personalized needs. Whether it is additional protection measures or special packaging materials, we can adjust according to your specific requirements. Our goal is to ensure that your goods arrive at their destination safely and intact.

Special customized packaging

Size customization: Design special brackets or reinforcement materials for extra-long steel and special-shaped steel.
Environmentally friendly packaging: Use degradable or recyclable packaging materials to meet customers’ green environmental protection requirements.
Brand logo: Provide customers with packaging with company logos or special marks to facilitate brand identification and logistics management.
Special protection: Such as adding shock-proof cushions or built-in pressure-resistant brackets for packaging of precision steel or high value-added products.

export to 70+ countries

Gnee steel products have been exported to many countries and regions, including:

Asia: Such as Japan, India, South Korea, Singapore, Malaysia, Thailand
Middle East: Such as United Arab Emirates, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain
Africa: Such as South Africa, Egypt, Nigeria, Kenya, Algeria, Morocco
America: Such as Canada, Mexico, Brazil, Argentina, Chile
Europe: Such as Germany, United Kingdom, France, Italy, Spain, Russia, Poland

No matter where the customer is located, Gnee can respond quickly with a complete logistics network.

Testing Services

We ensure the quality and performance of our nickel alloy products through the following testing services:

Chemical Composition Analysis
Mechanical Properties Testing
Hardness Testing
Non-Destructive Testing (NDT)
Dimensional Inspection
Visual Surface Inspection
Corrosion Resistance Evaluation
Test Report

Processing Services

We understand that every project has unique requirements. To support our customers, we offer a range of practical and efficient processing services for nickel alloy products, including:

Cutting Services: such as laser cutting, plasma cutting or water jet cutting, etc.
Sheet Metal Processing: such as stamping, bending, shearing
Welding Services: such as TIG welding, MIG welding, electron beam welding, etc.
Surface Treatment: such as polishing, electroplating, sandblasting, etc.
Heat Treatment: including annealing, quenching, tempering, etc.
Customized Processing: According to the specific needs of customers, we provide customized nickel alloy processing services, including customization in shape, size, thickness, etc.