The alloy used to produce Hastelloy c276 Fasteners is a solid solution strengthened one. Solid solution strengthening is a technique that is often employed to steel grades in order to improve its tensile strength properties. Moreover, nickel in combination with chromium is used to increase the impact strength as well as the tensile strength of the alloys, while providing the Hastelloy c276 screws with good heat resisting properties. Not forgetting that nickel added in the alloy also ensures that the metal is able to resist reductive conditions.

Hastelloy c276 Fasteners

Chromium, when added in a sizeable amount is what makes the material resistant to oxidation by forming a passivated oxide layer. Just as nickel and chromium, molybdenum is also a major alloying component in the Hastelloy c276 threaded rod. Adding molybdenum to the alloy aids with resistance to both pitting as well as to crevice corrosion.

This is particularly noticed when the ASTM B574 UNS N10276 stud bolts have been exposed to environments containing chlorides and sulphur. This chemistry with the addition of a small amount of tungsten, in the Alloy C276 Bolts, results in the metal exhibiting excellent resistance to corrosion in an assortment of harsh environments. Applications of the Hastelloy c276 nuts include those industries where these fasteners can be utilized such as the power generation, petrochemical and chemical processing, pharmaceutical along with pulp and paper production as well as waste treatment to name a few.

Equivalent material of Hastelloy c276 Fasteners

Hastelloy Alloy C276 N10276 2.4819 NiMo16Cr15W NW 0276 ЭП760 ХН65МВУ

ASTM B574 UNS N10276 stud bolts Composition Standard

Ni C Mo Mn Si Fe P S Co Cr
Balance 0.01 max 15 – 17 1.0 max 0.08 max 4 – 7 0.04 max 0.03 max 2.5 max 14.5 – 16.5

Hastelloy c276 screws Mechanical Analysis

Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
8.89 g/cm3 1370 °C (2500 °F) Psi – 52,000 , MPa – 355 Psi – 1,15,000 , MPa – 790 40 %

Alloy C276 Bolts Specifications, sizes and dimensions

Material Hastelloy Alloy c276
Sizing Ranges M02 upto M152.4
Standards ASTM B574 / ASME SB574
Lengths 3 to 6 Millimetre
Most Used Types Hastelloy c276 Threaded Tod, Tie Rods, Double Ended Studs etc.
Threads: UNC, BSF, UNF, METRIC, or as per needs
In Form of: Round, Threading, Hex, Square as per Gauge.