INCONEL 601/625 BOLTS

About INCONEL 601/625 BOLTS

Inconel 625 and Inconel 601 are nickel-based superalloys used for high-performance fasteners and components in extreme environments. Inconel 625 excels in corrosion resistance and strength at high temperatures, while Inconel 601 is optimized for oxidation resistance and stability in thermal cycling.

Inconel 625 Specifications & Uses

• Material Grade: UNS N06625, EN 2.4856
• Key Properties:
• Tensile strength: ~830 MPa
• Yield strength: ~414 MPa
• Excellent resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking
• Stable up to 982C (1800F)
• Applications:
• Offshore oil & gas equipment (flanges, valves, bolts)
• Chemical processing plants (acid-resistant fasteners)
• Marine environments (seawater exposure)
• Aerospace exhaust systems and turbine components
• Standards: ASTM B446 (bars), ASTM B564 (forgings), ASTM B443 (plates), ASTM F468/F467 (bolts & nuts)

Inconel 601 Specifications & Uses

• Material Grade: UNS N06601, EN 2.4851
• Key Properties:
• Tensile strength: ~620 MPa
• Yield strength: ~240 MPa
• Outstanding oxidation resistance up to 1200C (2200F)
• Good mechanical strength and ductility even after long exposure to heat
• Resistant to seawater and high-temperature corrosion
• Applications:
• Power generation (boilers, gas turbines, heat exchangers)
• Aerospace engineering (engine parts, combustion chambers)
• Nuclear industry (reactor fasteners)
• Marine hardware requiring oxidation resistance
• Standards: ASTM B166 (bars), ASTM B167 (tubes), ASTM B168 (plates), ASTM B564 (forgings)

Comparison: Inconel 625 vs Inconel 601

Key Takeaway

• Choose Inconel 625 when corrosion resistance and strength are critical (marine, chemical, offshore).
• Choose Inconel 601 when oxidation resistance at very high temperatures is the priority (power plants, aerospace engines).