NeoNickel

Alloy C276

Alloy C276 is a versatile, corrosion-resistant nickel-molybdenum-chromium alloy engineered for use in aggressive chemical environments.

Characteristics of Alloy C276

Alloy C276, sometimes referred to as Hastelloy C276 or Inconel C276, is one of the most corrosion-resistant materials on the market. Its nickel-molybdenum-chromium base, enhanced with tungsten, provides reliable performance in both oxidising and reducing media.

Engineered for use where aggressive chemicals or high temperatures render other alloys unsuitable, C276 is particularly effective against pitting, crevice corrosion, and chloride-induced stress corrosion cracking. It offers excellent fabricability, making it a dependable solution for industries requiring durable and versatile materials.

  • Excellent resistance to strong oxidisers, acids and chlorides
  • Prevents pitting and crevice corrosion in challenging conditions
  • Outstanding resistance to stress corrosion cracking
  • Good thermal stability and weldability
  • Suitable for aggressive offshore and industrial environments
  • UNS Number: N10276
  • Werkstoff Number: 2.4819
  • ASTM: B564, B574, B575, B619, B622, B626, B366, B462, B775

Product availability

Coil
Flanges
Pipe (Seamless)
Pipe (Welded)
Pipe Fittings
Plate
Round Bar
Round Tube
Sheet
Welding Electrode
Welding Wire

Chemical analysis

%NiCrMoWCoCMnSiPSFeV
MinBalance14.515300000040
MaxBalance16.5174.52.50.0110.080.040.0370.35

Key Properties

  • Density: 8.89 g/cm³
  • Melting Range: 1325 - 1370°C
  • Hardness: 87 HRB
  • Specific Heat Capacity: 427 J/kg.°C
  • Electrical Resistivity: 1.229 µΩ.m
  • Poisson's Ratio: 0.307

These material properties make alloy C276 suitable for applications that demand strength and resistance in acidic or corrosive environments.

Mechanical & Physical Properties

Mechanical & Physical Properties21⁰C100⁰C200⁰C300⁰C400⁰C
Ultimate Tensile Strength for sheet ≤ 5 mm thick750-1000
Ultimate Tensile Strength for sheet 5 to ≤ 20 mm thick700-950
Ultimate Tensile Strength for bar ≤ 90 mm thick700-950
0.2% Yield Strength for sheet ≤ 50 mm thick280240220195
0.2% Yield Strength for sheet 5 to ≤ 20 mm thick255255200170
0.2% Yield Strength for bar ≤ 90 mm thick255225200170
Elongation, % for sheet ≤ 5 mm thick30
Elongation, % for sheet 5 to ≤ 20 mm thick25
Elongation, % for bar ≤ 90 mm thick35
Charpy Impact V-notch mean value / J 96 (56 when welded)
Charpy Impact V-notch indicidual value / J 67 (39 when welded)

Aqueos Corrosion Data

MediaCommon NameTemp °F (°C)Corrosion Rate (mpy)
80% C2H4O2Acetic AcidBoiling0.15
10% NH3BrAmmonium Bromide176 (80)Nil
10% NH3BrAmmonium BromideBoilingNil
10% FeCl3Ferric ChlorideBoiling2
88% CH2O2Formic AcidBoiling1
0.2% HClHydrochloric AcidBoiling0.60
1% HClHydrochloric AcidBoiling13.3
2% HClHydrochloric AcidBoiling43
5% HClHydrochloric Acid140 (60)10
20% HClHydrochloric Acid212 (100)154
3% HFHydrofluoric Acid176 (80)53
10% HFHydrofluoric Acid75 (24)2
10% HFHydrofluoric Acid176 (80)28
Concentrated HFHydrogen fluoride75 (24)24
Concentrated HFHydrogen fluoride176 (80)80
10% HBrHydrogen Bromide176 (80)<1
10% HBrHydrogen BromideBoiling<1
10% HNO3Nitric AcidBoiling15
65% HNO3Nitric AcidBoiling888
20% H3PO4Phosphoric AcidBoiling<1
60% H3PO4Phosphoric AcidBoiling1
85% H3PO4Phosphoric Acid212 (100)5
85% H3PO4Phosphoric AcidBoiling121
50% NaOHSodium HydroxideBoiling1
10% H2SO4Sulphuric AcidBoiling20
20% H2SO4Sulphuric Acid176 (80)3
40% H2SO4Sulphuric Acid176 (80)5
80% H2SO4Sulfphuric Acid176 (80)4

Applications of Alloy C276

Thanks to its outstanding corrosion and stress resistance, Alloy C276 is a trusted material in a wide range of sectors:

Chemical & Petrochemical Processing

  • Reactors and distillation columns
  • Scrubbers and absorbers
  • Heat exchangers

Energy & Power Generation

  • Flue gas desulphurisation units
  • Offshore platforms
  • Condensers and evaporators

Pharmaceutical & Food Processing

  • Vessels and piping exposed to sanitising agents

Marine & Environmental

  • Components exposed to seawater, acids and harsh cleaning chemicals

Benefits of Choosing Alloy C276

C276 is a go-to material for engineers and project managers requiring durability, corrosion resistance and reliability in hostile conditions.

  • Exceptional Chemical Resistance: Handles oxidising and reducing environments including HCl, H₂SO₄ and HNO₃
  • High Mechanical Integrity: Maintains strength across a wide temperature range
  • Stress Corrosion Crack Resistance: Suitable for marine and sour gas applications
  • Weld-Friendly: Requires no post-weld heat treatment
  • Proven Versatility: Performs in both structural and processing roles

Frequently Asked Questions

What is Alloy C276 used for?
Is Alloy C276 the same as Hastelloy or Inconel C276?
What is the chemical composition of Alloy C276?
What makes Alloy C276 corrosion resistant?
Is Alloy C276 suitable for seawater environments?
Can Alloy C276 be welded?

Why Choose NeoNickel for Alloy C276?

When sourcing critical alloys like Alloy C276 (also known as Inconel C276 or Hastelloy C276), reliability is everything. At NeoNickel, our materials are:

  • Supplied in certified forms that meet international standards including ASTM B575, B622, and B626
  • Backed by full traceability and material test reports (MTRs)
  • Available with fast lead times from stock held across European facilities
  • Supported by expert metallurgists and technical specialists to help you choose the right form for your application

Our proven track record in supplying high-performance alloys to the aerospace, chemical processing and offshore industries gives you confidence in both quality and delivery.

Proud members of the British Valve & Actuator AssociationProud members of the British Valve & Actuator Association