Superalloy fasteners engineered for seawater immersion, splash zone exposure, and offshore platform service. Monel K-500, Inconel 625, and Hastelloy C-276 for the most aggressive marine environments.
Marine fasteners must resist the relentless attack of seawater: pitting, crevice corrosion, chloride stress corrosion cracking, cavitation, and biofouling-related under-deposit attack. Monel K-500 bolts are the marine industry reference material, age-hardenable nickel-copper with three times the yield strength of Monel 400, non-magnetic, and essentially immune to flowing seawater corrosion. Inconel 625 handles the hottest marine environments with a PREN exceeding 50. Hastelloy C-276 provides unmatched resistance in stagnant and polluted seawater with hypochlorite dosing. Inconel 718 delivers structural strength where load dominates, with controlled hardness for subsea service.
UNS N05500 · Alloy K500
Marine · Pumps & Shafts · Downhole Tools · Springs
UNS N06625 · GH3625
Marine · Chemical Processing · Nuclear · Aerospace Ducting
UNS N10276 · Alloy C-276
Chemical Processing · FGD Scrubbers · Pulp & Paper · Waste Treatment
UNS N07718 · GH4169
Jet Engines · Gas Turbines · Nuclear · Subsea
Monel K-500 bolts for seawater pump and valve fasteners, propeller shaft couplings, and hull-mounted equipment. Non-magnetic for sensitive instrumentation. Resists cavitation and high-velocity erosion.
Offshore platform and riser flange bolting in Inconel 625 and Inconel 718. Splash zone hardware with PREN > 50 seawater corrosion resistance. NACE MR0175 compliant for topsides and subsea joints.
Sonar, navigation, and magnetic survey equipment fasteners in non-magnetic Monel K-500. Submarine seawater system bolting with full material certification and controlled hardness.
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