VDM® Alloy C-276

Steelun Steel Standards of VDM® Alloy C-276:

UNS N10276

Equivalent standards of VDM® Alloy C-276:

DIN EN 2.4819 – NiMo16Cr15W,ISO NiMo16Cr15Fe6W4
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Steelun Description of VDM® Alloy C-276:

VDM® Alloy C-276 is a nickel-chrome-molybdenum alloy with tungsten. It is characterized by: Extraordinary resistance across a wide range of corrosive, watery media, in particular oxidizing and reducing acids, particularly high resistance against chloride-induced crevice, pitting and stress corrosion.

Chemical composition of VDM® Alloy C-276:

Element Weight %
Ni 51.0 — 63.0
Mo 15.0 — 17.0
Cr 15.0 — 16.5
Fe 4.0 — 7.0
W 3.0 — 4.5
Co 2.5
Mn 1.0
V 0.3
Si 0.08
P 0.02
S 0.01
Cu 0.01
C 0.01

Steelun Properties of VDM® Alloy C-276:



General information

Density [ ρ ] 8.90 g/cm³


Relative magnetic permeability [ μrel ] 1.00 [-]



Impact strength, Charpy notched [ Ivnot ] 1200 kJ/m²





Melting point [ Tm ] 1325—1370 °C



All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.

Technological properties of VDM® Alloy C-276:

Application areas
VDM® Alloy C-276 has a broad field of application in the chemicals and petrochemicals industry, for components in organic processes containing chlorides, and for catalytic systems. The material can be used especially in cases where hot, contaminated mineral acids, solutions or organic acids (such as formic acid and acetic acid) and seawater occur. Examples of fields of application: Paper and pulp industry, e.g. for digestion and bleaching tanks, washers, agitators and wet ventilators in flue gas desulfurization systems, equipment and components for acid gas applications, reactors for acetic acid production, sulfuric acid coolers, methylene diphenyl isocyanate (MDI), manufacturing and processing of contaminated phosphoric acid.
Corrosion properties
VDM® Alloy C-276 can be used in many chemical processes with both oxidizing as well as reducing media. The high chrome and molybdenum concentrations make the alloy resistant to chloride ion attacks. The tungsten content further increases this resistance. VDM® Alloy C-276 is one of the few materials that are resistant against chlorine gas, hypochlorite and chlorine dioxide solutions. The alloy is characterized by excellent resistance against concentrated solutions of oxidizing salts (such as iron III and copper chloride).
VDM® Alloy C-276 should be machined in the heat-treated condition. For reasons of the considerably increased tendency to work hardening in comparison to austenitic stainless steels, a low cut speed at a feed level that is not too high should be selected and the cutting tool should be engaged at all times. An adequate depth of cut is important in order to cut below the previously formed strain-hardened zone. Optimum heat dissipation through the use of large quantities of suitable, preferably aqueous, lubricants has considerable influence on a stable machining process.
VDM® Alloy C-276 has a cubic, face-centered microstructure. In the temperature range of 600 to 1100 °C, intermetallic phases can form during longer exposure times or when cooling is too slow. In addition, carbides can dissipate on the grain boundaries, which reduce resistance against intercrystalline corrosion.

Steelun Applications of VDM® Alloy C-276:

Extraction & Processing of Petroleum & Natural Gas,Equipment for Chemical Industry,Equipment for Paper Industry,Transformers & Reactors,Industrial Machinery

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