Hastelloy B2 Socket Head Cap Screws

A Socket Head Cap Screw (often called an Allen head screw) is a type of cylindrical threaded fastener with an internal hexagonal drive (socket) that allows it to be driven by an Allen wrench or key. This design is highly favored for applications requiring high clamping forces and minimal external clearance around the head. When machined from Hastelloy B2 (UNS N10665), these cap screws gain phenomenal resistance to severe reducing environments, particularly non-oxidizing acids like hydrochloric acid (HCl) and sulfuric acid across a wide range of concentrations and temperatures. Zeron Fastners is a reliable manufacturer and supplier of these specialized nickel alloy cap screws, ensuring small, high-stress, and corrosion-critical assemblies remain secure and impervious to chemical attack in the most demanding industrial settings.

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Hastelloy B2 Socket Head Cap Screws

Hastelloy B2 Chemical Composition

Element Composition (%)
Nickel (Ni) Balance
Molybdenum (Mo) 26.0 to 30.0
Iron (Fe) 2.0 max
Chromium (Cr) 1.0 max
Cobalt (Co) 1.0 max
Carbon (C) 0.02 max

Hastelloy B2 Mechanical Properties

Property Value (Minimum)
Tensile Strength, min 690 MPa (100,000 psi)
Yield Strength (0.2% Offset), min 350 MPa (51,000 psi)
Elongation, min 40%
Hardness (Rockwell B) 90 max
Density 9.24 g/cm3 (0.334 lb/in3)

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