Alloy C276

The most universally corrosion resistant material available today, look no further than C276

A solution-annealed nickel-molybdenum-chromium alloy with the addition of tungsten, C276 exhibits excellent corrosion resistance in a wide range of severe environments.

Inventory

Product form	Size range from	Size range to
Alloy C276 coil	0.5 mm	3.05 mm
Alloy C276 sheet & plate	0.63 mm	76.2 mm
Alloy C276 round tubing	0.25 in	1 in
Alloy C276 round bar	3.175 mm	280 mm
Alloy C276 pipe fittings	0.5 in	24 in
Alloy C276 pipe	0.5 in	24 in
Alloy C276 flanges	0.5 in	24 in

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Coil
Pipe
Pipe Fittings
Flanges
Welding Consumables
Sheet & Plate
Round Bar

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Chemical Analysis

%	Ni	Cr	Mo	W	Co	C	Mn	Si	P	S	Fe	V
Min	Balance	14.5	15	3	0	0	0	0	0	0	4	0
Max	Balance	16.5	17	4.5	2.5	0.01	1	0.08	0.04	0.03	7	0.35

Applications

Ideal for use within the Pharmaceutical industry

Alloy C276 can be used in a variety of applications including:

Pressure Vessels
Reactors
Mixers and Agitators
Scrubbers
Dampers
Heat Exchangers
Venturis
Evaporators
Solvent Recovery Plants
Pumps and Valves

About Alloy C276

Alloy C276, with a high nickel contents, is immune to chloride-induced stress corrosion cracking. The high molybdenum and chromium contents allow the alloy to perform in oxidising, non-oxidising and mixed acids media, whilst exhibiting outstanding resistance to pitting and crevice corrosion attack. The addition of tungsten inhibits the development of pits. Finally, C276 is suitable for off-shore applications where hydrogen-sulphide(H2S) stress corrosion cracking resistance is essential.

In aggressive or corrosive environments when other alloys have failed, many companies have then turned to C276 alloy – one of the most corrosion resistant alloys on the market.

Industries where C276 is utilised are petrochemical and chemical processing, power generation, pharmaceutical, pulp and paper production and waste treatment to name a few.

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

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Mechanical & Physical Properties
Aqueos Corrosion Data

Mechanical & Physical Properties	21⁰C	100⁰C	200⁰C	300⁰C	400⁰C
Ultimate Tensile Strength for sheet ≤ 5 mm thick	750-1000
Ultimate Tensile Strength for sheet 5 to ≤ 20 mm thick	700-950
Ultimate Tensile Strength for bar ≤ 90 mm thick	700-950
0.2% Yield Strength for sheet ≤ 50 mm thick		280	240	220	195
0.2% Yield Strength for sheet 5 to ≤ 20 mm thick		255	255	200	170
0.2% Yield Strength for bar ≤ 90 mm thick		255	225	200	170
Elongation, % for sheet ≤ 5 mm thick	30
Elongation, % for sheet 5 to ≤ 20 mm thick	25
Elongation, % for bar ≤ 90 mm thick	35
Charpy Impact V-notch mean value / J	96 (56 when welded)
Charpy Impact V-notch indicidual value / J	67 (39 when welded)

Media	Common Name	Temp °F (°C)	Corrosion Rate (mpy)
80% C2H4O2	Acetic Acid	Boiling	0.15
10% NH3Br	Ammonium Bromide	176 (80)	Nil
10% NH3Br	Ammonium Bromide	Boiling	Nil
10% FeCl3	Ferric Chloride	Boiling	2
88% CH2O2	Formic Acid	Boiling	1
0.2% HCl	Hydrochloric Acid	Boiling	0.60
1% HCl	Hydrochloric Acid	Boiling	13.3
2% HCl	Hydrochloric Acid	Boiling	43
5% HCl	Hydrochloric Acid	140 (60)	10
20% HCl	Hydrochloric Acid	212 (100)	154
3% HF	Hydrofluoric Acid	176 (80)	53
10% HF	Hydrofluoric Acid	75 (24)	2
10% HF	Hydrofluoric Acid	176 (80)	28
Concentrated HF	Hydrogen fluoride	75 (24)	24
Concentrated HF	Hydrogen fluoride	176 (80)	80
10% HBr	Hydrogen Bromide	176 (80)	<1
10% HBr	Hydrogen Bromide	Boiling	<1
10% HNO3	Nitric Acid	Boiling	15
65% HNO3	Nitric Acid	Boiling	888
20% H3PO4	Phosphoric Acid	Boiling	<1
60% H3PO4	Phosphoric Acid	Boiling	1
85% H3PO4	Phosphoric Acid	212 (100)	5
85% H3PO4	Phosphoric Acid	Boiling	121
50% NaOH	Sodium Hydroxide	Boiling	1
10% H2SO4	Sulphuric Acid	Boiling	20
20% H2SO4	Sulphuric Acid	176 (80)	3
40% H2SO4	Sulphuric Acid	176 (80)	5
80% H2SO4	Sulfphuric Acid	176 (80)	4

Mechanical & Physical Properties

Mechanical & Physical Properties	21⁰C	100⁰C	200⁰C	300⁰C	400⁰C
Ultimate Tensile Strength for sheet ≤ 5 mm thick	750-1000
Ultimate Tensile Strength for sheet 5 to ≤ 20 mm thick	700-950
Ultimate Tensile Strength for bar ≤ 90 mm thick	700-950
0.2% Yield Strength for sheet ≤ 50 mm thick		280	240	220	195
0.2% Yield Strength for sheet 5 to ≤ 20 mm thick		255	255	200	170
0.2% Yield Strength for bar ≤ 90 mm thick		255	225	200	170
Elongation, % for sheet ≤ 5 mm thick	30
Elongation, % for sheet 5 to ≤ 20 mm thick	25
Elongation, % for bar ≤ 90 mm thick	35
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

Media	Common Name	Temp °F (°C)	Corrosion Rate (mpy)
80% C2H4O2	Acetic Acid	Boiling	0.15
10% NH3Br	Ammonium Bromide	176 (80)	Nil
10% NH3Br	Ammonium Bromide	Boiling	Nil
10% FeCl3	Ferric Chloride	Boiling	2
88% CH2O2	Formic Acid	Boiling	1
0.2% HCl	Hydrochloric Acid	Boiling	0.60
1% HCl	Hydrochloric Acid	Boiling	13.3
2% HCl	Hydrochloric Acid	Boiling	43
5% HCl	Hydrochloric Acid	140 (60)	10
20% HCl	Hydrochloric Acid	212 (100)	154
3% HF	Hydrofluoric Acid	176 (80)	53
10% HF	Hydrofluoric Acid	75 (24)	2
10% HF	Hydrofluoric Acid	176 (80)	28
Concentrated HF	Hydrogen fluoride	75 (24)	24
Concentrated HF	Hydrogen fluoride	176 (80)	80
10% HBr	Hydrogen Bromide	176 (80)	<1
10% HBr	Hydrogen Bromide	Boiling	<1
10% HNO3	Nitric Acid	Boiling	15
65% HNO3	Nitric Acid	Boiling	888
20% H3PO4	Phosphoric Acid	Boiling	<1
60% H3PO4	Phosphoric Acid	Boiling	1
85% H3PO4	Phosphoric Acid	212 (100)	5
85% H3PO4	Phosphoric Acid	Boiling	121
50% NaOH	Sodium Hydroxide	Boiling	1
10% H2SO4	Sulphuric Acid	Boiling	20
20% H2SO4	Sulphuric Acid	176 (80)	3
40% H2SO4	Sulphuric Acid	176 (80)	5
80% H2SO4	Sulfphuric Acid	176 (80)	4

Specifications

UNS Number:: N10276
Werkstoff Number:: 2.4819
Standards:: ASTM B564, B574, B575, B619, B622, B626, B366, B462, B775

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