HASTELLOY C276 - Alloy Steel Supplier

Hastelloy C276 UNS N10276

Hastelloy C276 is a versatile nickel-molybdenum-chromium alloy with an addition of iron and tungsten. The density of Hastelloy C276 is approximately 0.321 pounds per cubic inch (lb/in³). This value may vary slightly depending on the specific composition and manufacturing process, but 0.321 lb/in³ is a widely accepted standard. Renowned for its exceptional corrosion resistance in severe environments, this alloy is ideal for chemical processing, pollution control, and marine applications.

Specifications

Property	Value/Specification
Alloy Type	Nickel-Molybdenum (Ni-Mo) Alloy
Density	~8.89 g/cm³ (at 20°C)
Melting Point	~1315°C (2400°F)
Heat Treatment	Solution annealed at 1065–1149°C (1950–2100°F)
Tensile Strength	700–1,000 MPa (varies with form and temperature)
Yield Strength	340 MPa (sheet)
Yield Strength	325 MPa (forging/bar)
Elongation	40% (minimum, varies with form)
Hardness (Rockwell B)	85–95 HRB

Characteristics

Excellent Weldability

The first nickel-chromium-molybdenum alloy designed to alleviate welding concerns, with extremely low carbon and silicon content.

Outstanding Corrosion Resistance

Highly resistant to oxidizing and non-oxidizing acids.
Exceptional resistance to pitting and crevice corrosion, particularly in the presence of chlorides and halides.
Resistant to wet chloride gas, hypochlorite, and chlorine dioxide
Excellent resistance to strong solutions of oxidizing salts such as ferric and cupric chlorides.

Superior Stress Corrosion Resistance

Provides outstanding resistance to stress corrosion cracking (SCC) in chloride-bearing solutions, ideal for environments where austenitic stainless steels fail.

Sulfide Stress Cracking Resistance

High resistance to sulfide stress cracking in sour, oilfield environments.

Ductility & Formability

Ductile, easy to form, and weld, making it ideal for diverse industrial applications.

No Grain Boundary Precipitation

Not prone to grain boundary precipitation in the as-welded condition, suitable for many chemical process industries (CPI).

Standards

ASTM B574

——Billet, Rod & Bar——

ASTM B575

——Sheet, Plate & Strip——

ASTM B619

——Welded Pipe & Tube——

ASTM B622

——Seamless Pipe & Tube——

DIN

——17744 No. 2.4819 NiMo16Cr15W——

A5.14 ERNiCrMo-4

——Welding Wire——

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Data Sheet

Chemical Composition

Element	Composition (Weight %)
Nickel (Ni)	57.0–63.0% (Balance)
Molybdenum (Mo)	15.0–17.0%
Chromium (Cr)	14.5–16.5%
Iron (Fe)	4.0–7.0%
Tungsten (W)	Up to 4.0%
Cobalt (Co)	Up to 2.5%
Manganese (Mn)	Up to 1.0%
Vanadium (V)	Up to 0.35%
Silicon (Si)	Up to 0.08%
Carbon (C)	Up to 0.01%
Copper (Cu)	Up to 0.5%
Phosphorus (P)	Up to 0.04%
Sulfur (S)	Up to 0.03%

Physical Properties

Property	Metric	Imperial
Density	8.89 g/cm³	0.321 lb/in³
Melting Point	1370–1418°C	2500–2585°F
Electrical Resistivity	1.37 μohm·m (at 20°C)	53.8 μohm·in (at RT)
Thermal Conductivity	11.2 W/m·°C (at RT)	78 Btu·in/h·ft²·°F (at RT)
Specific Heat	373 J/kg·°C (at RT)	0.089 Btu/lb·°F (at RT)
Modulus of Elasticity	216 GPa (at RT)	31.4 x 10⁶ psi (at RT)

Corrosion Resistance

Wide Chemical Resistance

Outstanding protection against hot mineral acids, ferric and cupric chlorides, and organic/inorganic chlorides.

Chloride Ion Protection

High molybdenum, chromium, and tungsten content resist pitting and crevice corrosion.

Chlorine Compound Durability

Resistant to moist chlorine gas, hypochlorite, and chlorine dioxide solutions.

Versatile in Oxidizing and Reducing Media

Performs exceptionally in diverse chemical environments.

Marine Suitability

Excels in sea water and brine solutions.

Oxidizing Salts

Withstands concentrated ferric and copper chlorides.

Mechanical Properties(Room Temperature)

Property	Metric	Imperial
Tensile Strength	750–1,050 MPa	108,000–152,000 psi
Yield Strength (0.2%)	290–500 MPa	42,000–73,000 psi
Elongation (in 50 mm)	30–60%	30–60%
Hardness	Up to 195 HB	Up to 195 HB
Elastic Modulus	205 GPa	29,700 ksi

By Product Form

Product Form	Tensile Strength (ksi)	Yield Strength (ksi)	Elongation (%)
Bar	110.0	52.6	62
Plate	107.4	50.3	67
Sheet	115.5	54.6	60
Tube & Pipe	105.4	45.4	70

Mechanical Properties(Elevated Temperature)

Property	Metric	Imperial
Tensile Strength (@538°C)	601 MPa	87,200 psi
Yield Strength (0.2%) (@427°C)	204 MPa	29,700 psi
Elongation (in 50 mm)	Slightly higher than at RT	Slightly higher than at RT
Elastic Modulus	Lower than 205 GPa at RT	Lower than 29,700 ksi at RT

Welding and Fabrication

Welding

High Weldability: HASTELLOY® C-276 is highly weldable using common techniques like TIG (GTAW), MIG (GMAW), and Stick Welding (SMAW).
Matching Filler Metals: Matching filler metals (solid wires and coated electrodes) are available to ensure optimal weld quality.
Welding Guidelines: Standard guidelines should be followed for each welding process to maintain the alloy’s corrosion resistance and mechanical properties.

Fabrication and Forming

Mill Annealed Condition: Supplied in the Mill Annealed (MA) condition to optimize corrosion resistance and ductility.
Solution Annealing:

Temperature: 1121°C (2050°F).

Cooling: Water quenchingis recommended for thicker structures; rapid air cooling is feasible for thinner structures (<10 mm).

Hold Time: 10 to 30 minutes, depending on thickness.

Hot Working:

Processes: Can be hot forged, hot rolled, hot upset, hot extruded, and hot formed.

Temperature Range:

Start: 1232°C (2250°F).

Finish: 954°C (1750°F).

Moderate reductions and frequent reheating are advised for the best results.

Cold Working:

Characteristics: More energy is required compared to austenitic stainless steels due to higher stiffness and readiness to work harden.

Multi-Stage Forming: May require several stages of cold work with intermediate annealing.

Re-Annealing: Necessary after 7% or more outer fiber elongationto restore optimum properties.

Applications

Customized Package

Oil-coated paper wraps our plates, providing protection against corrosion.
Plates are placed on wooden pallets and strapped to secure them, preventing shifting during transportation.

Thick woven plastic bags are used to bundle several bars and rods together.
Each bundle is carefully packed, with the weight not exceeding 1500 KG for safe handling.

Tubes and pipes are packed in air cushion film to shield them from dirt and scratches.
For extra protection, they are placed in wooden cases to prevent damage during transit.

Logistics

At AlloyXpert, sea transportation is the most commonly used method for the majority of our orders and is considered the default shipping mode. Therefore, our quotations are typically based on FOB, CFR, or CIF terms. For customers with urgent requirements, we also offer air transportation as an expedited shipping option. Please feel free to reach out for customized solutions based on your delivery needs.

Related Products

ASTM B574

ASTM B575

Hastelloy B3

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